Matlab Legend Function dose not work at all

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Zachery
Zachery 2024-4-3，17:31
回答： Voss 2024-4-3，18:26
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

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采纳的回答

Star Strider
Star Strider 2024-4-3，18:10
编辑：Star Strider 2024-4-3，18:13
Ran in:
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.
.
EDIT — Corrected typographical errors.
.

更多回答（1 个）

Voss
Voss 2024-4-3，18:26
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.

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