Matlab Wind Vector Plot

Plot Quiver Vectors Corresponding to Latitude and Longitude. You use datetick() to add dates to a plot axis in MATLAB. If no output arguments are specified, a plot of the imaginary part vs. Matlab and Mathematica Projects for $10 - $30. Introduction to Matlab Plotting Sample script: plotExample. The 2nd is a plot of the v wind field. Is it possible in Matlab to plot windspeed and wind direction in a time series for historical analysis of wind direction. Complex Numbers and Plotting in Matlab When plotting in Matlab, whether it be in two or three dimensions, a number of issues involving complex numbers will arise. This produces a vector sv, whose elements are squares of the elements of vector v. See the descriptions and go to the topic of your interest. Matlab is a software package that makes it easier for you to enter matrices and vectors, and manipulate them. Defining a Vector¶. The particles trace the flow along a particular stream line. Use Plotly with MATLAB ® to share your figures with non-MATLAB ® users, to create web-based MATLAB ® dashboards, as the visualization toolbox in MATLAB ® web applications, or just for publication quality vector image export. 0 with NetCDF installed. If the input vector contains complex numbers, MATLAB plots the real part of each element (on the horizontal axis) versus the imaginary part (on the vertical axis). Understanding of the global behavior of this system has improved markedly in the recent past from coordinated observations with a constellation of satellite and ground. A Matlab-like interface in the form of a set of functions allows easy creation of objects (e. The plane of streamlines indicates the flow of air from the west to the east (the x -direction) beginning at x = 80 (which is close to the minimum value of the x coordinates). For plotting, it is easier in my opinion to not use meshgrid if you want to scale the arrows. This MATLAB function plots the vector Y or plots each column in matrix Y as a separate curve and stacks the curves. m Data Visualization. My goal is to sometime code most of this in JAVA so that anyone can run it on the WWW, w/o having to understand MATLAB code that was written for a one-time-use. The doc is now mutually contradictory while the behaviour sucks! Clearly if you explicitly choose a grouped or stacked bar chart, by passing the flag, then orientation of matrix Y matters, and each row of Y is a group. I don't know what indis will be, that's why my only option is to use indis in the plotting syntax. Problems for Matlab Fundamentals Tom Huber, Gustavus Adolphus College Envision It Workshop, February 1, 1997. Thus knowing the MATLAB RGB triples for the colors can be useful. This can be useful for a variety of things but when I first learned about it, I was a bit confused by how the axes seem to be flipped sometimes when you do this. A vector in MATLAB is defined as an array which has only one dimension with a size greater than one. You do not type the symbol ˛. » plot (x,y) % Plot vector y versus vector x. If you take the square root of a negative number, the result is a complex number. Is it possible in Matlab to plot windspeed and wind direction in a time series for historical analysis of wind direction. a) Note that y[n]and x[n]are not the same length. I want to reproduce this plot in Blender. To plot our sine wave, simply type. SVG is usable by LaTeX. Bauhaus, Art Deco, Brutalist, MATLAB, ggplot? Matlab has made a mark on the scientific visualization world. Plot aesthetics The color, point marker, and line style can be changed on a plot by adding a third parameter (in single quotes) to the plot command. An example of putting multiple curves on a plot Here are the MATLAB commands to create a symbol plot with the data generated by adding noise to a known function. To get updates about upcoming videos, do subscribe our channel. It can also display information graphically. Plotting multiple data sets together helps correlate the trends between the two. You have a vector field $(E_X, E_Z)$ and you can simply normalize it like in the code below:. Community Forums. Starting with a 2D matrix I was able to plot it with the first column as the X axis and generate individual sub plots of the remanining columns. FFT of Signals in MATLAB Robert Francis. The main program is such that after plotting several plots on the Weibull distribution, it calls another matlab program to produce a wind rose. Streamline Plots in MATLAB ®. Find a format option that would result in the command 1/2+1/3 evaluating to 5/6. Students and professionals alike depend on the MATLAB computer software program from MathWorks to input, analyze, plot and share numerical data. If you try to plot the few lines of code I previously have plotted, my problem is that I finally want to have for example Marker 'o' for three points (each of them have a different color). To plot network parameters from a circuit ( rfckt ) or data ( rfdata ) object on a Smith chart, use the smith function. Visualizing Vector Fields. It started out as a matrix programming language where linear algebra programming was simple. In order to use this data, it must somehow be digitized. It is very common to superimpose vector plots on other graphs such as quiver plots. Learn more about matlab, matrix, plotting The problem is that you try to plot the vector using 2D line plot so your script. To plot phase trajectories (asked in the exercises below) use any computer software capable of plotting vector fields or isoclines (for instance MatLab or Mathematica). The syntax for. This table classifies and illustrates the common graphics functions. Si el número de filas de la matriz equivale a la longitud del vector, la función plot traza cada columna de matriz en comparación con el vector. Often data is found presented in reports and references as functional X-Y type scatter or line plots. If the input vector contains complex numbers, MATLAB plots the real part of each element (on the x-axis) versus the imaginary part (on the y-axis). Matlab has its standard axis with zero in the 3 o'clock position and the axis run anit clock wise. You need to take the following steps to calculate the magnitude of a vector − Take the product of the vector with itself, using array multiplication (. plot は座標軸の ColorOrder プロパティと LineStyleOrder プロパティに基づく色とライン スタイルを使用します。plot は最初のライン スタイルで色を順番に使用します。次に、以降のライン スタイルのそれぞれについて再び色を順番に使用します。. The positive v vector points up, and the negative v vector points down. how can I plot these based on different time interval. Introduction to Matlab Plotting Sample script: plotExample. How to make a streamline plot in MATLAB ®. Plotting functions is very easy in Matlab. After reading the " getting started " section, you can use the tutorial below for this. I have 2 nc file which contains hourly data of wind magnitude i. VectorPlot3D omits any vectors for which the v i etc. You need to take the following steps to calculate the magnitude of a vector − Take the product of the vector with itself, using array multiplication (. Basic Plot. Thus knowing the MATLAB RGB triples for the colors can be useful. The xlabel and ylabel commands generate labels along x-axis and y-axis. If X or Y is a matrix, then the vector is plotted versus the rows or columns of the matrix, whichever line up. Each column was its own plot with the 1st column as the X axis. Contours on the slice planes to improve the visibility of slice-plane coloring. In Matlab you must define the vector bb needed in filter( ). Types of MATLAB Plots. Plot Digitizer is a Java program used to digitize scanned plots of functional data. The wind data set contains the arrays u , v , and w that specify the vector components and the arrays x , y , and z that specify the coordinates. What is the length of the filtered signal, and why is it that length? b) Plot the first 50 samples of both waveforms x[n] and y[n] on the same figure, using subplot. Bauhaus, Art Deco, Brutalist, MATLAB, ggplot? Matlab has made a mark on the scientific visualization world. Basic Plot. The plot command is used to generate plots in matlab. Types of MATLAB Plots. This example plots the velocity vector cones for vector volume data representing the motion of air through a rectangular region of space. Students and professionals alike depend on the MATLAB computer software program from MathWorks to input, analyze, plot and share numerical data. write the type of code used. dll' submission on the MATLAB Central File Exchange to do this on a Windows platform. I need some help plotting vectors in either Maple or MATLAB. The particles trace the flow along a particular stream line. plotting wind direction V/S time in months Learn more about wind plot, timeseries, wind direction plot MATLAB Answers. gsn_csm_vector_scalar_map is the plot interface that draws either vector quantities on a scalar field, or colors those quantities by the scalar field. Plot quiver vectors in a direction corresponding to +5 degrees latitude and +3 degrees longitude. quiver(x,y,u,v) plots vectors as arrows at the coordinates specified in each corresponding pair of elements in x and y. How to make a streamline plot in MATLAB ®. * Challenge: Plot functions x (blue squares and line), x^2 (red circles and line) and x^1/2 (green diamonds and line) between (0,2) on the same plot. Create a script file and type the following code − x = [0:5:100]; y = x; plot(x, y) When you run the file, MATLAB displays the following plot − Let us take one more example to plot the function y = x 2. How to Create Wind Vector Plots with Panoply: How to Create Wind Vector Plots with Panoply: No labels Overview. FFT of Signals in MATLAB Robert Francis. ” In my opinion this is a kludge. The last argument to ezplot3 gives the minimum and maximum values of the parameter for the plot. Which one to use ?. This code was designed to run on Matlab 6. Use help and preferences to find and modify keyboard shortcuts if needed. Generating Matrices. 25 and put in in the function. A technique for removing them from your vector is shown here. Dear all, I would like to plot the wind speed and direction in windrose. [FX,FY,FZ,…] is numerical gradient of matrix F. Plotting vectors individually will, of course, slow down the routine as the vector plotting will need to be placed in some kind of for loop, but it can be done. If Matlab finds several solutions it returns a vector of solutions. t = [1 2 3]). The goal of data visualization should not be to make pretty pictures, but rather to deliver comprehension of the phenomena behind the data into the mind of the beholder as simply, efficiently, and accurately as possible, without introducing any new false understandings. Those are your decisions, but you have to have one set of direction data and one set of velocity data to use any function I’m aware of (including nine). An example of putting multiple curves on a plot Here are the MATLAB commands to create a symbol plot with the data generated by adding noise to a known function. Using Matlab For Geological Applications Written by George Hilley With modifications and additions by Ramon Arrowsmith An Introduction to Matlab 1. Plot eigen Vector e1 & e2 in matlab?. How can I plot divergent wind vectors using the "divergence" function in Matlab? After using this function with U and V as input fields, I get a scalar matrix. It can also display information graphically. do not evaluate to real numbers. Since you have the data [code ]x[/code] and [code ]y[/code], just simply call [code ][m,i] = max(y)[/code] and you will get the maximum [code ]m[/code] and the respective index [code ]i[/code]. Matlab to Python conversion¶. There are several operations you can perform with vectors which don't make a lot of sense with other arrays such as matrices. I want to plot a histogram showing the relative frequency (or the absolute frequency) of occurrence of wind speeds below 4 knots for every 30 degree arc. The first is a plot of the u wind magnitude, plotted as a scalar field using contours. Matlab supports two in-built functions to compute and plot histograms: hist – introduced before R2006a histogram – introduced in R2014b. The interface follows a language that is designed to look a lot like the notation use in linear algebra. A stream particle animation is useful for visualizing the flow direction and speed of a vector field. I want to plot a histogram showing the relative frequency (or the absolute frequency) of occurrence of wind speeds below 4 knots for every 30 degree arc. A collaborative effort to organize Matlab tools for the Oceanographic Community. Hi everyone, I'm new in matlab and I'm struggling quite a lot. MATLAB: Workshop 15 - Linear Regression in MATLAB page 5 where coeff is a variable that will capture the coefficients for the best fit equation, xdat is the x-data vector, ydat is the y-data vector, and N is the degree of the polynomial line (or curve) that you want to fit the data to. If you use symbols, they are plotted at the start points of the vectors, i. Content Tools. Here is an example of a plot of a sine wave. The first argument is the vector of x-coordinates and the second is the vector of y-coordinates. div = divergence(X,Y,Z,U,V,W) computes the divergence of a 3-D vector field having vector components U, V, W. To terminate a running Matlab command. 25 and put in in the function. The quiver3 function automatically scales the vectors to prevent overlapping based on the distance between them. MATLAB Tutorial - Function Plotting Basics - Plot multiple lines Learn MATLAB in simple and easy steps starting from basic to advanced concepts with examples. The m-files are not turn-key programs and are not supported by their creator or by USGS. 0 with NetCDF installed. Find MATLAB expressions for the following , , and. Understanding of the global behavior of this system has improved markedly in the recent past from coordinated observations with a constellation of satellite and ground. Contours on the slice planes to improve the visibility of slice-plane coloring. The doc is now mutually contradictory while the behaviour sucks! Clearly if you explicitly choose a grouped or stacked bar chart, by passing the flag, then orientation of matrix Y matters, and each row of Y is a group. The fourth is a plot of the streamlines (lines parellel to the wind flow). There are several operations you can perform with vectors which don't make a lot of sense with other arrays such as matrices. Hi, I think you misunderstood my question. Matlab supports two in-built functions to compute and plot histograms: hist – introduced before R2006a histogram – introduced in R2014b. I don't know what indis will be, that's why my only option is to use indis in the plotting syntax. net - A Resource for the Technical Computing Community A Resource for the Technical Computing Community. In fluid mechanics, the contours are a scalar quantity such as pressure or temperature;thevectorsarehorizontalvelocity. How to Create Wind Vector Plots with Panoply: How to Create Wind Vector Plots with Panoply: No labels Overview. the attachment is an example. MATLAB functions can be used to create various types of plots including rectilinear, log-log, semilog, polar plots and others. If it is not, you will need to remove them. The quiver3 function automatically scales the vectors to prevent overlapping based on the distance between them. The best way to learn what Matlab can do is to work through some examples at the computer. I have directions and windspeed as my first and second column, and using wind_rose. I don’t know how you want to deal with hourly wind velocity and incomplete direction data every three hours. plot vectors head to tail. Plot Digitizer is a Java program used to digitize scanned plots of functional data. The xlabel and ylabel commands generate labels along x-axis and y-axis. For example, you can compare sets of data, track changes in data over time, or show data distribution. There are several operations you can perform with vectors which don't make a lot of sense with other arrays such as matrices. How to make a histogram in MATLAB ®. For example, if I make a wind rose for a site based on data over 10 years, and then want to demonstrate how a particular event compares, I would like to have an line out from the center in that direction with something (length/color/weight/?) to. 14159 On to your question: use the command quiver to plot vectors. In MATLAB, a polynomial is represented by a vector. Many programming errors are caused by using a row vector where a column vector is required, and vice versa. •Syntax To plot the example vectors above in a new figure:. If it is not, you will need to remove them. plotmatrix(X) is the same as plotmatrix(X,X) except that the subaxes along the diagonal are replaced with histogram plots of the data in the corresponding column of X. gsn_csm_vector_scalar_map is the plot interface that draws either vector quantities on a scalar field, or colors those quantities by the scalar field. This example shows how to use stream lines, slice planes, and contour lines in one graph. It supports fast vector graphics rendering for interactive data analysis (read: fast live updating plots) and custom plot construction. Often data is found presented in reports and references as functional X-Y type scatter or line plots. The plot is coming OK, but as there are many vectors the figure looks a bit clumsy. Create the translation and rotation vectors from the simulated state. MATLAB Programming. A Matlab-like interface in the form of a set of functions allows easy creation of objects (e. From the table above, we can define the default colors to work with them or can put in the RGB triplet (as a vector) directly into the plot command. (Not working with R2017b and later versions ). The interface follows a language that is designed to look a lot like the notation use in linear algebra. See the descriptions and go to the topic of your interest. For example, plot two lines and a scatter plot. You can also plot the fixed-wing trajectory using plotTransforms. There are many ways of representing the data on a plot, including using individual markers to represent unique data points or connecting each data point with a line. ^Open MathWorks Technical Support Web Page type List file ver Display version information for MATLAB, Simulink, and toolboxes version Get MATLAB version number web Point Help browser or Web browser at file or Web site what diary List MATLAB-specific files in current directory. Those are your decisions, but you have to have one set of direction data and one set of velocity data to use any function I’m aware of (including nine). I have x, y, u and v datas. Usually RGB colors have values from 0 to 255. Create vectors: >> x=1:10; creates the 1x10 row vector of the first 10 integers and assigned it to the variable. The following sections provide a brief introduction to some basic concepts for programming in Matlab Version 5, that is installed in the laboratory. Matlab is a software package that makes it easier for you to enter matrices and vectors, and manipulate them. So you have a vector field which you want to plot with the added bonus of visualizing vector lengths? Matlab's quiver3 command might be a good starting point for that. These MAT-files include chirp, gong, laughter, splat, train, and handel. , u component and Wind direction i. Define fallout wind vector plot. Does anyone know what can be wrong? My data are imported as an array, the data are sorted from the smallest to the biggest values. The fourth is a plot of the streamlines (lines parellel to the wind flow). The length of the vector must equal one of the matrix dimensions. actually my problem is that i hv 2 signals with same time nd i m doing cross correlation using xcorr()function. Plot quiver vectors in a direction corresponding to +5 degrees latitude and +3 degrees longitude. Try to enter the following lines of code into your Matlab Command Window. ncl: Wind barbs colored by a scalar field. Hi everyone, I'm new in matlab and I'm struggling quite a lot. Stream Line Plots of Vector Data Wind Mapping Data. X-axis log scale. I want to plot my vector field, need help using quiver function. I have directions and windspeed as my first and second column, and using wind_rose. MATLAB is a programming language developed by MathWorks. If it is not, you will need to remove them. There already exist many excellent tutorials developed by many universities for their coursework. The first is a plot of the u wind magnitude, plotted as a scalar field using contours. 14159 On to your question: use the command quiver to plot vectors. plots produced by this code. If you try to plot the few lines of code I previously have plotted, my problem is that I finally want to have for example Marker 'o' for three points (each of them have a different color). How can I plot vectors in spherical coordinates using matlab? I have theta, phi and r component of a field but i don't know how to make vector plots of them showing their special variation. Matlab is a tool for doing numerical computations with matrices and vectors. After these ' in-a-nutshell ' lessons, you'll be almost ready to do your own Matlab programs!. It is based on the original 2D implementation of Xu and Prince. This MATLAB function plots the vector Y or plots each column in matrix Y as a separate curve and stacks the curves. Definition of fallout wind vector plot in the Definitions. In Matlab, pi is preassigned the value 3. The coupling between the solar wind and the magnetosphere is mediated and controlled by the magnetic field in the solar wind through the process of magnetic reconnection. This example plots the velocity vector cones for vector volume data representing the motion of air through a rectangular region of space. gsn_csm_vector_scalar_map is the plot interface that draws either vector quantities on a scalar field, or colors those quantities by the scalar field. part c - prepare a wind vector plot using the manual method There may be instances when there is no plotting scale available to the NBCC for the preparation of a wind vector plot. feather(U,V) displays the vectors specified by U and V, where U contains the x components as relative coordinates, and V contains the y components as relative coordinates. The plot is coming OK, but as there are many vectors the figure looks a bit clumsy. This table classifies and illustrates the common graphics functions. docx), PDF File (. Plotting wind direction is a straight forward attempt in MATLAB. a) Note that y[n]and x[n]are not the same length. For example, the subaxes along the diagonal in the i th column is replaced by histogram(X(:,i)). But the addition of it is not easy because it's not right to add it as a costant because the wind is not a costant but I think that is a vector field. You can also plot the fixed-wing trajectory using plotTransforms. Audio Processing in Matlab Matlab is widely used environment for signal processing and analysis. For a partial list of Matlab tutorials out on the web, click here. Usually RGB colors have values from 0 to 255. (Not working with R2017b and later versions ). The technique would work for other data you want to remove also. DJF), please enter year of the LAST month. A vector function represents a curve in space. Using the plot function this is simple; however my graph diverges to 0 due to the 0 elements in my energy-vector. To plot network parameters from a circuit ( rfckt ) or data ( rfdata ) object on a Smith chart, use the smith function. here frequency w is in radian/sec not f (in HZ) so w will give you the no. Si el número de filas de la matriz equivale a la longitud del vector, la función plot traza cada columna de matriz en comparación con el vector. The MATLAB M-file used to create this plot is experr. Wind Mapping Data. This example plots the velocity vector cones for vector volume data representing the motion of air through a rectangular region of space. Since you have the data [code ]x[/code] and [code ]y[/code], just simply call [code ][m,i] = max(y)[/code] and you will get the maximum [code ]m[/code] and the respective index [code ]i[/code]. Usually RGB colors have values from 0 to 255. It supports fast vector graphics rendering for interactive data analysis (read: fast live updating plots) and custom plot construction. Next message: [ncl-talk] WRF: vertical cross-section vector plot for wind profile Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Hi Tabish, Let me make my small contribution to the group, rather than always waiting for a help from ncl-talk support folks, who can be overwhelmed with help requests. From the table above, we can define the default colors to work with them or can put in the RGB triplet (as a vector) directly into the plot command. This produces a vector sv, whose elements are squares of the elements of vector v. function dydt = TimeDiff (t, y, C) % Differential equation for time-based polynomial derivative % t is time % y is the state vector % C contains any required constants % dydt must be a column vector dydt = polyval (C, t);. gsn_csm_vector_scalar_map is the plot interface that draws either vector quantities on a scalar field, or colors those quantities by the scalar field. To compute a bootstrap statistic of the mean of our vector x by using 500 new realisations, we call m = bootstrp(500, 'mean', x); To show the variation of the mean across all bootstrap realisations, we plot the histogram. In MATLAB, the discrete sound signal is represented by a vector and the frequency is measured in Hertz. The quiver3 function automatically scales the vectors to prevent overlapping based on the distance between them. fallout wind vector plot listed as FWVP. For the rose as this plots they would need to be adjusted to be at the 12 o'clock and running clock wise. A quiver plot displays velocity vectors as arrows with components (u,v) at the points (x,y). Calculate the wind chill factor when the temperature is 50F and the wind speed is 20mph. 14159 On to your question: use the command quiver to plot vectors. The syntax for. 0 (R14), you can use the 'MultiSelect' parameter with UIGETFILE to allow the selection of multiple files. For plotting, it is easier in my opinion to not use meshgrid if you want to scale the arrows. The particles trace the flow along a particular stream line. How to Make 3D Plots Using MATLAB. The third is a plot of the wind speed. Using the plot function this is simple; however my graph diverges to 0 due to the 0 elements in my energy-vector. I tried to draw the wind arrows of u & v winds using the grads. Use the stem function to make a discrete-time signal plot, but label. how can I plot these based on different time interval. Actually, I already "compute out my wind vectors" in my case study by using Python. MATLAB is a programming language developed by MathWorks. If it is not, you will need to remove them. The third argument of the plot command is a one, two or three character string of the form 'cs', where 'c' is a single character indicating the color and 's' is a one or two character string indicating the type of symbol or line. ncl: Wind barbs colored by a scalar field. How to make a streamline plot in MATLAB ®. Matlab or Matplotlib will save infinite resolution vector graphics SVG format, viewable in web browsers. In my opinion we can see as a first approximation, the wind as a force that acts only in the x,y directions. A stream particle animation is useful for visualizing the flow direction and speed of a vector field. How can I to plot wind vectors from a netcdf file?. It can also display information graphically. I have x, y, u and v datas. The plot command can also be used with just one input vector. Calculate the wind chill factor when the temperature is 50F and the wind speed is 20mph. Wind vector plotting coloured based on magnitude Writing date-time information to obstore file using "datetime" python module Zero padding, Array indexing, Counting and Contour Plot in Python. Ta = y(:,1) ; T = y(:,2) ; X = y(:,3) where, Ta, T and X are column vector To plot Ta and T along the volume of the reactor, we will use MATLAB plot function. Learn more about wind vector plot, plot. MATLAB is Vector/Matrix-Oriented Much of the power of MATLAB comes from the fact that it can operate simultaneously on all the elements in a vector or matrix (unlike C, which operates only on individual elements at a time). X-axis log scale. Plotting vectors individually will, of course, slow down the routine as the vector plotting will need to be placed in some kind of for loop, but it can be done. I also need the result to be a vector so I can plot all the values. This produces a vector sv, whose elements are squares of the elements of vector v. I have the following plot and a file of the data which creates that plot. This example shows how to use stream lines, slice planes, and contour lines in one graph. I have roughly 10 or 11 points at which I want to plot the tangent, normal, and binormal vectors. If the input vector contains complex numbers, MATLAB plots the real part of each element (on the horizontal axis) versus the imaginary part (on the vertical axis). To plot vector functions or parametric equations, you follow the same idea as in plotting 2D functions, setting up your domain for t. Basic Plot. Welcome to Matlab in Chemical Engineering at CMU Current post (107 and counting) Last post for a while July 20, 2013. The last debugging tips in is to add possible code inside the comments I. Create the translation and rotation vectors from the simulated state. Matlab is a program that has been developed for the general solution of mathematical equations, data processing, and data display. Stream Line Plots of Vector Data Wind Mapping Data. In black-and-white, the most common “combo” is vector-plot-on-contour-plot as exemplified by Fig. Use the streamtube function to indicate flow in the wind data set. m which I got from Matlab fileexchange Thanks S. Wind Chill Calculation. I want to plot a histogram showing the relative frequency (or the absolute frequency) of occurrence of wind speeds below 4 knots for every 30 degree arc. Plot over an image background in MATLAB T his is a short tutorial that documents how to make a MATLAB plot on top of an image background. If S is a row or column vector, then each entry in S specifies the area for the corresponding marker. This is in case of 2D. It is based on the original 2D implementation of Xu and Prince. The fourth is a plot of the streamlines (lines parellel to the wind flow). I don’t know how you want to deal with hourly wind velocity and incomplete direction data every three hours. S — Marker area 36 (default) | scalar | vector | [] If S is a scalar, then scatter3 plots all markers with the specified area. I am trying to do vector plot using quiver command in MATLAB. I have a parametric space curve and I am trying to plot the tangent, normal, and bi-normal unit vectors at several points along the curve. Usually RGB colors have values from 0 to 255. If you take the square root of a negative number, the result is a complex number. MATLAB is Vector/Matrix-Oriented Much of the power of MATLAB comes from the fact that it can operate simultaneously on all the elements in a vector or matrix (unlike C, which operates only on individual elements at a time). Which one to use ?.