Find The Relationship between Data Set

Right now I have 10 data set, with total around 800 times measurement (so I would have matrix with dimension 800x10), I want to know the relationship between each column of my dataset.

Is there any matlab toolbox that I can use to handle this problem?

Thank you for your time before.

[jonas]

Statistics

see e.g. corr() function

[Arygianni Valentino]

that is what I looking for. Thank you very much for your respon.

Answer 1

[Pawel Jastrzebski]

Look into the following fucntions:

• plotmatrix
• Corrcoef

It should help you quickly assess visually whether the values in your matrix are correlated with each other. This way you can determine that:

i.e. column 1 and 5 are correlated but 1 and 4 aren't. Then carry out more elaborate data analysis on the identified sets of data.

Corrcoeff will help you quantify your findings (it will give you a level of correlation)

Consider the following example:

% memory preallocation
data     = zeros(30,4);

% data generation
noise     = 1-2*rand(30,1);
data(:,1) = 1:30;
data(:,1) = data(:,1) + noise;
data(:,2) = sin(1:30);
data(:,3) = 1 - cos(1:30);
noise     = 1-2*rand(30,1);
data(:,4) = sqrt(data(:,1));

% matrix plotting
plotmatrix(data)
cVal = corrcoef(data)

The output is:

And

cVal =

      1.0000   -0.1413    0.0376    0.9774
     -0.1413    1.0000   -0.0167   -0.1641
      0.0376   -0.0167    1.0000    0.0397
      0.9774   -0.1641    0.0397    1.0000

Conclusion:

Seems like data from column 1 and 4 are correlated.