How to reduce precision of data greator than zero only? (Matlab R2019a)

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taimour sadiq
taimour sadiq 2021-3-16
评论： taimour sadiq 2021-3-16
Hello... Lets suppose i have a data stored in a variable
A = [1.23323 45.24343 0.1 0.001 455.34543 0.0001 ]
i want to shrink pricision of data only greator than zero... i tryed
A(A>0) - str2double(compose('%.2f',A(A>0)))
so the result should be
A = [1.23 45.24 0.1 0.001 455.34 0.0001] %% <<<< Desired Results
but its not woking, it applying %.2f on whole data....and giving >>>
A = [1.23 45.24 0.10 0.00 455.34 0.00]
Kindly Guide. Thanks

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采纳的回答

Walter Roberson
Walter Roberson 2021-3-16
Ran in:
format long g
A = [1.23323 -45.24343 0.1 0.001 455.34543 -0.0001 ]
A = 1×6
1.23323 -45.24343 0.1 0.001 455.34543 -0.0001
mask = A>0;
A(mask) = round(A(mask),2);
A
A = 1×6
1.23 -45.24343 0.1 0 455.35 -0.0001
  1 个评论
Walter Roberson
Walter Roberson 2021-3-16
Ran in:
It is possible that what you really want is
format long g
A = [1.23323 -45.24343 0.1 0.001 455.34543 -0.0001 ]
A = 1×6
1.23323 -45.24343 0.1 0.001 455.34543 -0.0001
mask = abs(A)>0.01;
A(mask) = round(A(mask),2);
A
A = 1×6
1.23 -45.24 0.1 0.001 455.35 -0.0001

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