ERROR message when running code
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The following command only plots the first subplot and gives the ERROR message:
Error in subplot (line 8)
subplot(3,1,1);
and this is the code below:
clear all
clc
x = 0 : pi/150 : 2*pi;
y1 = sin(x);
y2 = sin(x-0.25);
y3 = sin(x-0.5);
subplot(3,1,1);
plot(x, y1, 'r')
subplot(3,1,2);
plot(x, y2, 'g')
subplot(3,1,3);
plot(x, y3, 'b')
grid off
xlabel('Time (sec)');
ylabel('Amp (v)');
title('Signal xt');
legend('y1', 'y2', 'y3');
2 commentaires
Adam Danz
le 16 Avr 2019
The code works fine for me, without error. The only problem I see is the legend() does not specify object handles and therefore only shows one of the three lines.
Please copy-paste the entire error message and tell us what version of matlab you're running. Run 'ver' (without quotes).
Réponse acceptée
Star Strider
le 16 Avr 2019
Modifié(e) : Star Strider
le 19 Avr 2019
Your code plots all three variables. Note that they only differ by phase, so the easiest way to detect the difference is where they begin at ‘x=0’.
The error is not an error. It is a Warning, because you are plotting one variable and the legend specifies three variables. You either need to use a separate legend call in every subplot, or instead use the title function with each subplot.
EDIT —
‘Attempt to execute SCRIPT subplot as a function:’
You have a script that you named ‘subplot’. This is called ‘overshadowing’ a MATLAB function. Please do not do that!
The solution is to re-name your script to something that does not have the same name as a MATLAB function. For example rename it to ‘mySubplot.m’ or something similar that makes sense in the context of your code.
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