'Array indices should be positive' error

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Vinisha Venugopal 2019-3-12

评论： Star Strider 2020-2-17

Let's say I'm taking an array of values from an Excel file,

maybe the first column in the excel file and I wanna find the standard deviation for it.

So the code is gonna be

col=a(:,1);

std=std(col);

It gives an output for the first run, but when I run it second time, it gives an error saying,"Array indices should be positive". Why?

Kindly help.

Thanks,

Vinisha.

Star Strider 2019-3-12

This is the reason:

std=std(col);

You ‘overshadowed’ the std function by naming your variable ‘std’.

Do this and the problem will go away:

StDev = std(col);

You will have to change that variable in the rest of your code, however the MATLAB Editor should make that easy.

Timmy Watt 2020-2-17

This solved my problem too, thank you!

Star Strider 2020-2-17

My pleasure!

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