Display only positive values
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Hello. I am trying to display only the positive values of a vector by using the find function to find where the negative values are first and then displaying only the positive values. I have tried using i = find(vector<0) but I don't know how to only delete the negative values using the find function to display only the positive values. Thanks.
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Star Strider
2019-9-28
Yolu can simply use logical indexing for this, find is not absolutely necessary.
However, if you want to use find, assign its output to a variable:
idx = find(vector>0);
PosVals = vector(idx);
Testing for the negative values and then eliminating them requires an extra step:
idx = find(vector<0);
posidx = setdiff((1:numel(vector)), idx);
PosVals = vector(posidx)
Experiment to get different results.
2 个评论
Kat
2019-9-28
Star Strider
2019-9-28
Yes. Just test for positive values and return those indices. If you want to test for negative velues, use logical indexing and the logical negation (~) operator:
Lneg = vector < 0; % Logical Vector Of Elements < 0
Lpos = ~Lneg; % Logical Vector Of Elements >= 0
Then use find with those if you want to.
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