After the > prompt enter lookfor complex.Įxample 2: By using hold on and hold off, you can plot several functions on the same axes using a number of plot commands.
![plot matlab plot matlab](http://info.ee.surrey.ac.uk/Teaching/Courses/matlab/plotting/plot1W.gif)
Suppose you were interested in commands involving the use of complex numbers. For example, to get help on many graphics related commands, click on Plotting and Data Visualization.Īnother help option is the lookfor facility. help print a menu of print options for your FigureĪlternatively, if you do not know the precise name of a MATLAB command for which you need help, you can click on the Help button at the top of the MATAB Command Window, then click on “MATLAB Help” followed by “MATLAB Functions Listed by Category” and then on a topic of interest.Enter each of the following after the > prompt and carefully read the information until you understand precisely what each of the lines in the previous (or next) M-file is accomplishing.
![plot matlab plot matlab](https://i.stack.imgur.com/1VaXT.png)
To get assistance with the MATLAB commands featured above and in the next example, you can use the help facility. Change the above M-file to the following (this is important!):Īxis() % specifies the axes limits But the empty space at the right end of the graphs is annoying, and how can we label the output so that each graph can be identified? There are many facilities provided by MATLAB to assist you in producing attractive, meaningful graphs.
#Plot matlab code
You notice that we found the three y-arrays in a single line of code and they were plotted in different colours. Here t is measured in seconds and y1, y2, 圓 are measured in cm. You will need three dots in the expression to generate the array y.Įxercise 2: Plot the graph of y = sin9x + sin10.5x + sin12x for −π ≤ x ≤ π using 601 points.Įxample 1: Suppose you want to plot the oscillations y1 = cost, y2 = cos3t and their sum 圓 = y1 + y2, for 0 ≤ t ≤ 4π, on the same axes. Similarly, the second array contains the y-coordinates.Įxercise 1: Plot the graph of y = xex/ x 2 − π 2 for −3 ≤ x ≤ 2 using a step-size of 0.02. Note: Students often get this wrong by forgetting that the first array always contains the x-coordinates, not the two coordinates of the first point. For example, to plot a straight line from the point (1,7) to the point (3,-5) you need the command plot(,). Please note that you only need two points to plot a single straight line. In general, most graphs can be satisfactorily plotted using arrays of, say, 101 to 201 points, although erratic or wildly fluctuating functions would require many more points. Ĭlearly this attempt is unacceptable because we have not used sufficient points! Change the 11 to 201 and execute the code again. Type in the following as an attempt to graph y = sinx for 0 ≤ x ≤ 2π. If a Figure window already exists, another plot command clears the current Figure window by default (unless instructed not to do so) and draws a new plot. , (x(n), y(n)), and then graphs the data by connecting the points with straight lines. If x =, then the MATLAB command plot(x,y) opens a graphics window, called a Figure window, scales the axes to fit the data, plots the points (x(1), y(1)), (x(2), y(2)). In Sections 6 and 8 you will see there are two other commands to create graphs, namely fplot which uses function M-files and ezplot which is inside the Symbolic Math Toolbox.
#Plot matlab full
The full assignment is asking us to generate a plot with our programming language of choice, save it, and then have the LaTeX code actually recall the file and then insert into a pdf.In this section we will use MATLAB ’s plot command to produce graphs. Once I get the code to run in Matlab, I get a weird looking ellipse and it doesn't look "pretty" like the one my professors gave us as reference which I have attached. The function that we were asked to plot is the following: 1 = x^(2)/9 - y^(2)/4 Furthermore it doesn't look anything like the example we were given for reference.
![plot matlab plot matlab](https://www.mathworks.com/help/examples/stats/win64/PlotDataGroupedbyCategoryExample_01.png)
My Matlab is a little rusty, and I don't think that I quite got the code right. We have a new assignment which is to generate a graph of a given function (in Matlab), save it and then recall it in LaTeX code as though we're making a publication. In addition to my R programming course, I am also taking an intro to LaTeX course.