How do I only display the rows for when column 1 is > 0 when I have 4 columns with corresponding data to the first column

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Christopher Wolfe 2021-9-12

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https://ww2.mathworks.cn/matlabcentral/answers/1451594-how-do-i-only-display-the-rows-for-when-column-1-is-0-when-i-have-4-columns-with-corresponding-dat

评论： Walter Roberson 2021-9-12

-0.00502163330810033 -0.00535602354270113 -0.00175905055456396 -0.00195122013126169

0.0191518806112861 0.0232968219264112 0.0157208477869482 0.0189597476631202

In this instance I only want to be showing the bottom row. To put it into context there's 1278 rows, basically just want to filter out all of the rows where the number in column 1 is a negative

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Christopher Wolfe 2021-9-12

The returns were for these figures above were denoted as The returns are denoted in this line rets = log(price(2:end,:)./price(1:end-1,:));

Walter Roberson 2021-9-12

How does this differ from your other question ?

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Answer 1

Chunru 2021-9-12

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https://ww2.mathworks.cn/matlabcentral/answers/1451594-how-do-i-only-display-the-rows-for-when-column-1-is-0-when-i-have-4-columns-with-corresponding-dat#answer_785724

在 MATLAB Online 中打开

a = [-0.00502163330810033	-0.00535602354270113	-0.00175905055456396	-0.00195122013126169
      0.0191518806112861	0.0232968219264112	0.0157208477869482	0.0189597476631202];
b = a(a(:,1)>0, :)      % this list the a where 1st column>0
b = 1×4
    0.0192    0.0233    0.0157    0.0190