normalization cell array [1 -1]

Dear all,

I have cell array called features got one row and four colunms,

features{1} = [-9 2 NaN 4 5 10];

features{2} = [2 -8.3 4 5 10];

features{3} = [8 NaN 10];

features{4} = [8 -4 9 9 2 1 3 10];

i would do normalization between 1 -1 based on this equation below, but this equation works with matrix not cell

features(:,1:end-1)=(features(:,1:end-1)-min(min(features(:,1:end-1))))/...

(max(max(features(:,1:end-1)))-min(min(features(:,1:end-1))));

i need a help how do normalization by ignoring last part of each cell which number 10 and NaN. and normolize it for the rest of numbers in cell.

thanks in advance.

Answer 1

[Nicolas B.]

oh I see that you are mixing cell arrays and arrays. With your feature structure, to access the -9 of your first line, you need to do:

features{1}(1)

So, with your structure, if you want to continue that way, you should use this code:

% the normalisation function for 1 array
fnom = @(v) [(v(1:end-1) - min(v(1:end-1)))/(max(v(1:end-1))-min(v(1:end-1))), v(end)];

% apply your function on features cell array
features = cellfun(fnom, features, 'UniformOutput', false)

[haitham qutaiba]

thank you so much Nicolas,