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My program isn't plotting anything

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Samuel Garcia
Samuel Garcia on 23 Feb 2020
Closed: MATLAB Answer Bot on 20 Aug 2021
I made a program meant to plot two arrays in an elipse like graph, but nothing is showing up when i call the plot function. I made sure the function is outside of my loops like so, yet nothing is showing up, what am I doing wrong?
for i=1:360

Answers (2)

Cameron B
Cameron B on 23 Feb 2020
I’m assuming your variables a and b are actual values. If not, it will obviously give an error that a and b are undefined. I think you have the visibility of your figure turned off. Also I would rename your variable from i to ii in order to avoid confusion with the built in identity of i=sqrt(-1). Try this:
close all
for ii=1:360
x1(ii)=a; %a should be some number
y1(ii)=b; %b should be some number

Walter Roberson
Walter Roberson on 23 Feb 2020
All of your x are the same, and all of your y are the same. You are drawing a line from a point to itself over and over again. That would create at most one dot on the screen. You could add '-*' as a plot option to make the one point more obvious.


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