How to find correlation coefficient between measured data and mathematically retrieved data without corr2.

2 次查看（过去 30 天）

显示更早的评论

Anjali Sharma 2017-12-18

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373478-how-to-find-correlation-coefficient-between-measured-data-and-mathematically-retrieved-data-without

评论： ANKUR KUMAR 2017-12-19

采纳的回答： ANKUR KUMAR

I dont have image processing toolbox with my license. I m interested to find correlation coeff between two matrices.

采纳的回答

ANKUR KUMAR 2017-12-18

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/373478-how-to-find-correlation-coefficient-between-measured-data-and-mathematically-retrieved-data-without#answer_296727

编辑：ANKUR KUMAR 2017-12-19

在 MATLAB Online 中打开

First method: Use corrcoef to find the correlation coefficient which yields a 2*2 matrix. eg.

A=corrcoef(randi(35,9,9),randi(25,9,9));

result is A=

    1.0000    0.0441
    0.0441    1.0000

So, you can use A(1,2) or A(2,1).

Second method: If you find the correlation, then you can use corr2(A,B), where A and B must be of equal dimension. It gives the required answer.

If you want the spatial correlation, then you can have to find correlation at every grid using the same function corr2 or you can interpolate into finer grids to get the spatial correlation.

Yes I too guess corrcoef will do the job. Just to cross-check can you please confirm that the correlation coefficient is same for the matrices you have taken in your example when used with corr2 (I could have done this but i can't!) Thanks in advance.

ANKUR KUMAR 2017-12-19