how can I fill a matrix with randomly -0.01 and 0.01

Question

Simon Blum 2017-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/331558-how-can-i-fill-a-matrix-with-randomly-0-01-and-0-01

评论： Simon Blum 2017-3-23

采纳的回答： Stephen23

I want to fill a matrix with only two diffrent numbers e.g. 0.01 and -0.01.

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Answer 1

Stephen23 2017-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/331558-how-can-i-fill-a-matrix-with-randomly-0-01-and-0-01#answer_260046

编辑：Stephen23 2017-3-23

在 MATLAB Online 中打开

>> V = [0.01,-0.01];
>> V(randi(numel(V),5,5))
ans =
  -0.010000   0.010000  -0.010000   0.010000   0.010000
  -0.010000   0.010000   0.010000   0.010000  -0.010000
  -0.010000  -0.010000   0.010000   0.010000  -0.010000
   0.010000  -0.010000  -0.010000  -0.010000  -0.010000
  -0.010000   0.010000  -0.010000   0.010000  -0.010000

Although you could calculate the values from randi, this method using indexing has the advantage that the values are not calculated but are exactly those values that you define in V.