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Is there any way to normalize any matrix values to be between (-1) and (1)?

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Sarah A
Sarah A 2019-1-12
评论： Walter Roberson 2019-1-13
Hello,
Is there any way to normalize any matrix values to be exactly between (-1) and (1)? I attached the matrix.
regards,

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采纳的回答

Image Analyst
Image Analyst 2019-1-12
You can use mat2gray(), which normalizes data from 0-1 then just scale and subtract 1 to get into the range -1 to +1:
M = 2*mat2gray(M)-1;
A nice single-line solution.
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Walter Roberson
Walter Roberson 2019-1-13
They would display as -1.0000 and 1.0000 especially with short format in effect, but if you take 1-max(M(:)) and min(M(:))+1 then you will see non-zero residues.

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更多回答（2 个）

madhan ravi
madhan ravi 2019-1-12
编辑：madhan ravi 2019-1-12
a=-1;
b=1;
N=100; % number of points
A=(b-a).*rand(N,1)+a; % creates numbers inbetween -1 and 1
https://www.mathworks.com/matlabcentral/answers/196798-how-to-normalize-values-in-a-matrix-to-be-between-0-and-1#answer_174487
Steven Lord
Steven Lord 2019-1-12
Use the normalize function with the 'range' method if you're using release R2018a or later.

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