Matlab Legend Function dose not work at all

I am simply trying to make legends on a graph with multiple traces on a single graph which should be easy with the 'legend' function.

x = linspace(0,pi);

y1 = cos(x);

plot(x,y1)

hold on

y2 = cos(2*x);

plot(x,y2)

legend('legend1','legend2')

When I run the code above I get error message "Index in position 1 exceeds array bounds (must not exceed 1)." on the line for the legend I am using version MatlabR2021a if that helps

Answer 1

[Star Strider]

There are no errors when I run your code —

x = linspace(0,pi);
y1 = cos(x);
plot(x,y1)
hold on 
y2 = cos(2*x);
plot(x,y2)
legend('legend1','legend2')

If the problem is only with the legend call, check to see if you have a variable or function called ‘legend’ somehwere in your workspace or on your MATLAB search path —

which legend -all

/MATLAB/toolbox/matlab/scribe/legend.m

The result should be only what is shown here. If there are any other entries, that points to the problem. The soution is to re-name your variable to something different, and that makes sense in the context of your code.

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EDIT — Corrected typographical errors.

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Answer 2

[Voss]

You have a variable called legend in your workspace interfering with you calling the legend function.

Run

clear legend

to clear that variable and then run your code again.