how to solve undefined function error when using corr2?

I have a set of values (x,y) and (x,y1). My x value is same.I need to find 2D correlation coefficient between them.I used corr2.It's showing "Undefined function 'corr2' for input arguments of type 'double'."Plz help

Answer 1

[Walter Roberson]

corr2() is part of the Image Processing Toolkit. You do not have that installed, or you do not have it licensed (or for some strange reason it is not in your MATLAB path.)

[smriti sebastian]

how to check if it's installed or not?

[Walter Roberson]

Try

which -all corr2
ver

The first of those is to see whether there is a corr2 file on the path; if there is not, then either the software is not installed or the installation is corrupt or you have done something strange to the MATLAB path. If the file is there but there is no license, then there will be a note such as "(no license")

The "ver" will include a line for the image processing toolkit if it is installed, even if there is no license for it.

[smriti sebastian]

'which -all corr2' O/P is 'corr2' not found. It means not installed?