Question

I try to normalize the data for each row of Matrix A into deciles.

Matrix A looks like:

[.01 .02 .03 .04 .05;
 1 2 3 4 5;
 1000 2000 3000 4000 5000];

how to normalize the first row into deciles, then the second row…till the last row? without using ‘for/while’?

The output would be like:

[2 3 6 8 10;
 2 3 6 8 10;
 2 3 6 8 10];

Look for a script. Thanks!

Answer 1

This should produce something similar to what you are asking for (using tiedrank from the Statistics toolbox):

f = @(x,i) tiedrank(x)*10/numel(x);
bsxfun(f,x',ones(1,3))'

be careful with the rounding and breaks though, you would likely need to adjust the last line in general.

Also: see https://stackoverflow.com/questions/9296568/matlab-normalize-data-into-deciles