What is wrong with this?

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mar vouz 2016-1-5

评论： mar vouz 2016-1-5

Hey I wrote:

X=linspace (0,1,8) 
Y=A (13:20,2)

(I had "A" form my last program)

P=polyfit (X,Y,7)

And it says error using polyfit X and Y vectors must be the same size! But they are same sized!!!I don't know what's wrong with it!

the cyclist 2016-1-5

They have the same number of elements, but they are not the same shape. You need to transpose one of them.

the cyclist 2016-1-5

P=polyfit(X,Y.',7)

FYI, you could have found this by trying

docsearch transpose

which will turn up (among other things) this documentation page.

mar vouz 2016-1-5

Thank you very much for your help!!

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