how to find correlation coefficient ?

hello, I have a mat file, which has two columns. file attached.

I want to find a correlation coefficient between these two columns.and p-value also. and also want Plot the Pearson's linear correlation coefficients between these two.

[Muhammad Usman Saleem]

its is a binary file.

Answer 1

[Muhammad Usman Saleem]

Try from them

http://stackoverflow.com/questions/14342938/correlation-between-two-vectors

http://www.mathworks.com/help/matlab/ref/corrcoef.html

http://www.mathworks.com/help/images/ref/corr2.html

http://www.mathworks.com/help/matlab/data_analysis/linear-correlation.html

https://www.quora.com/How-do-I-get-one-correlation-coefficient-or-r-value-in-MatLab

[pruth]

 A= a(:,2);
>> B = a(:,3); 
>> [R,P] = corrcoef(A,B)

R =

   NaN   NaN
   NaN   NaN

P =

   NaN   NaN
   NaN   NaN

[pruth]

why I m getting nan values?

[Muhammad Usman Saleem]

because you have not define a variable before

See this

a=[1 2 3;4 5 6] % creating a matrix

a =

       1     2     3
       4     5     6

A= a(:,2); % means all rows with second column of a matrix
B = a(:,3); % means all rows with third column of matrix
[R,P] = corrcoef(A,B) %cross correlation 

R =  % 1 showing good correl

       1     1  
       1     1

P =   %depends upon your data set NaN means no corr   

       1   NaN  
     NaN     1

hope this will be fine.

[pruth]

thanks man...