CODEWITHSUNDEEP
matlab
Tammara Brown
Tammara Brown

Reputation: 17

How to limit the amount of error bars Matlab

I have over 1 thousand data points on a graph. I would like to plot some error bars every 100 or so points data points.

x = 1:1500:1100;
y = [1:1200];
err = ?
plot(x.y);
hold on;
errorbar(x,y,err);

What value do I need for 'err' so I would only get 10 error bars?

Upvotes: 0

Views: 340

Answers (1)

HansHirse
HansHirse

Reputation: 18905

As David pointed out in his comment, your code is no proper MATLAB code. Nevertheless, I presume you have sufficient MATLAB understanding: Basically you need to set up separate x and y values for your errorbar as well as the actual errors err, which should be plotted. Then, you can use the proper errorbar command.

Let's have a look at this small example:

x = -5:0.1:5;
y = sin(x);

xErr = linspace(-5, 5, 11);       % Specify x locations for errorbar plot
yErr = sin(xErr);                 % The y values at these x locations
err = rand(1, 11);                % The actual errors, here: some random values

plot(x, y, 'r');                  % Plot
hold on;
errorbar(xErr, yErr, err, 'o');   % Actual errorbar plot at specific x locations
hold off;

You'll get an output like this:

Output

Disclaimer: I made this with Octave 5.1.0, but the syntax should be identical to MATLAB. If not, please report any errors.

Hope that helps!

Upvotes: 2

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