How Can I randomly select 10% of my array values and replace it with N/A or zero

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Med Future 2022-2-26

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评论： KSSV 2022-2-26

采纳的回答： KSSV

datasetvalue.mat

Hello Everyone, I hope you are doing well.

I have the dataset 250x1000 attached below. i want to randomly select 10% of element from may array and replace it with N/A or zero. How can i do that in matlab

Any help appreciated :)

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KSSV 2022-2-26

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编辑：KSSV 2022-2-26

在 MATLAB Online 中打开

Let A be your 250x1000 array.

N = numel(A) ; % total number of elements 
idx = randsample(N,round(10/100*N)) ;  % select 10% of indices randomly 
A(idx) = 0;   % replace with 0 

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KSSV 2022-2-26

在 MATLAB Online 中打开

It is straight forward, use NaN instead of zeros. Simple.

A(idx) = NaN ; % replace with NaN

KSSV 2022-2-26

Read doc, runt he function and you can see the difference.

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MATLAB Language Fundamentals Matrices and Arrays Creating and Concatenating Matrices

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