MATLAB: Normalized data -1 to 1

-1 to 1normalization

how to normalized data for the scale -1 to 1?

Best Answer

dmin = min(data(:));
dmax = max(data(:));
scaled_data = (data - dmin)./(dmax - dmin) * 2 - 1;

or more simply,

scaled_data = mat2gray(data) * 2 - 1;

Multiply by 2 and subtract 1 is a very convenient mapping from [0 1] to [-1 1]

Related Solutions

MATLAB: -1 and 1 matrix

Method One:

>> N = 5;
>> 2*mod(ndgrid(1:N,1:N),2)-1
ans =
   1     1     1     1     1
  -1    -1    -1    -1    -1
   1     1     1     1     1
  -1    -1    -1    -1    -1
   1     1     1     1     1

Method Two:

>> 2*(ones(N,1)*mod(1:N,2)).'-1
ans =
   1     1     1     1     1
  -1    -1    -1    -1    -1
   1     1     1     1     1
  -1    -1    -1    -1    -1
   1     1     1     1     1

Method Three:

>> repmat(2*mod(1:N,2).'-1,1,N)
ans =
   1     1     1     1     1
  -1    -1    -1    -1    -1
   1     1     1     1     1
  -1    -1    -1    -1    -1
   1     1     1     1     1

MATLAB: Data normalization in neural network

Solve the equation for data!

Hope this helps.

Thank you for formally accepting my answer

Greg

Best Answer

Related Solutions

MATLAB: -1 and 1 matrix

MATLAB: Data normalization in neural network

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