xlabel and ylabel errors

I have the following code:

x = linspace(-2*pi,2*pi,100);
y1 = sin(x);
y2 = cos(x);
figure
plot(x,y1,x,y2)
xlabel('-2\pi < x < 2\pi') 
ylabel('Sine and Cosine Values') 

when I run it brings the following error

Index exceeds the number of array elements. Index must not exceed 3.

Error in mfano (line 8)
ylabel('Sine and Cosine Values')

[Paul Bower]

Hi Winfrida, Just FYI ... I ran your code on version R2024b and it works fine.

Answer 1

[Star Strider]

This is instructive:

when I run it brings the following error

Index exceeds the number of array elements. Index must not exceed 3.

Error in mfano (line 8)

ylabel('Sine and Cosine Values')

Check to see if you have a variable named ‘ylabel’.

To do that, run this from a script or your Command Window —

which ylabel -all

/MATLAB/toolbox/matlab/graphics/graphics/axis/ylabel.m
/MATLAB/toolbox/matlab/graphics/graphics/specgraph/+matlab/+graphics/+chart/Chart.p                 % matlab.graphics.chart.Chart method
/MATLAB/toolbox/shared/controllib/graphics/+controllib/+chart/BodePlot.m                            % controllib.chart.BodePlot method
/MATLAB/toolbox/shared/controllib/graphics/+controllib/+chart/+internal/+foundation/AbstractPlot.m  % controllib.chart.internal.foundation.InputOutputPlot method

You should only get results similar to these. If the first entry is:

ylabel is a variable.

you have identified the problem. The solution is to re-name the variable.

.

[winfrida mwigilwa]

Thank you so much now is working.

[Star Strider]

As always, my pleasure!

[Walter Roberson]

It is somewhat common to code, for example

ylabel = ('Sine and Cosine Values')

which creates a variable named ylabel instead of calling the function named ylabel