Calculate the correlation coefficient between the first and the second measurement and the correlation coefficient between the first and the third measurement.

 I need to help in finding the correlation  coefficient between the first and the second measurement and the correlation  coefficient between the first and the third measurement. Please view the attached matlab file. 
Thanks for your help!

Answer 1

[Nicole Peltier]

The function corr tests correlations between pairs of variables. You can actually test the correlations between several pairs of variables in one line of code if they are stored as columns in a matrix.

C = corr([M_sensor, M_sensor2, M_sensor3]);

Then C(1,2) will be the correlation between M_sensor and M_sensor2, C(1,3) will be the correlation between M_sensor1 and M_sensor3, and C(2,3) will be the correlation between M_sensor2 and M_sensor3.

Since these three variables all came from data_all, you will get the same results by using:

C = corr(data_all(:, 1:3));

I'd recommend checking out the documentation for corr so that you can see what types of correlation tests it can perform.

Hope this helps!

[Sarah Can]

Thank you Nicole Peltier! I appreciate your help