Selecting numbers ending in a specific digit from a matrix

Question

Taylor Lovell 2021-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/1607780-selecting-numbers-ending-in-a-specific-digit-from-a-matrix

评论： Stephen23 2021-12-10

Hello,

I am trying to write a code that will select numbers from a file that end specifically in the numbers 4 or 9. The numbers are randomly generated and there are 10,000 numbers so the code needs to be able to be applied to the entire file

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Stephen23 2021-12-10

https://web.archive.org/web/20211210060504/https://www.mathworks.com/matlabcentral/answers/1607780-selecting-numbers-ending-in-a-specific-digit-from-a-matrix

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Answer 1

Chunru 2021-12-10

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https://ww2.mathworks.cn/matlabcentral/answers/1607780-selecting-numbers-ending-in-a-specific-digit-from-a-matrix#answer_852035

编辑：Chunru 2021-12-10

在 MATLAB Online 中打开

% Assume the numbers are integers
x = randi([-2000,2000], 100, 1);
% The number end with 4 or 9
x1 = mod(abs(x), 10);
idx = x1==4 | x1==9;
x(idx)
ans = 18×1
          39
         989
        -779
        1909
       -1874
       -1794
        1479
        1194
        1704
        -369