how can i solve this error: "index exceeds matrix dimensions"

Zernik Moments

i am trying the code from file exchange but getting is error: Index exceeds matrix dimensions. Error in Zernikmoment

    Product = p(x,y).*Rad.*exp(-1i*m*Theta);

Error in Zernikmain

     [mom, amplitude, angle] = Zernikmoment(BW2,4,0);

help me solving this error

[dpb]

We can't tell from only that and you don't even say which FEX code.

The first expression p might be an array but x,y are while not illegal, somewhat unusual variable names for array indices; sure it isn't a missing function?

In the second, it's pretty clear that Zernikmoment(BW2,4,0) is being interpreted as an array reference instead of a function which would tend to indicate you either haven downloaded the full submission or got it installed in a location on the Matlab path so all the m-files are being found the submission needs.

[Walter Roberson]

They included a link to the FEX code.

[dpb]

Ah...it had scrolled off the screen...

Answer 1

[Walter Roberson]

The submission includes Zernik_main but not Zernikmain (the file name in your message), and the Zernik_main does not include that line. We can conclude that your Zernikmain is not the same as the code they posted with a similar file name.

Zernikmoment assumes that it is being passed a square 2D matrix, p, and your code is violating that assumption so it is getting an index out of range.