Extracting specific numbers from a vector

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Darren Robinson
Darren Robinson 2016-8-19
编辑： Azzi Abdelmalek 2016-8-19
How can I extract a specific number from a vector, saving the new vector minus the extracted number as a new variable, and saving the counted extracted number as a new variable?
eg. Extracting '-20' from the following.
A = [2 4 6 5 6 5 4 3 -20 4 6 7 -20 3 4 5 6 1 -20];
A1 = [2 4 6 5 6 5 4 3 4 6 7 3 4 5 6 1];
A2 = 3

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回答（2 个）

Walter Roberson
Walter Roberson 2016-8-19
A1 = A(A ~= -20);
A2 = length(A) - length(A1);
Azzi Abdelmalek
Azzi Abdelmalek 2016-8-19
编辑：Azzi Abdelmalek 2016-8-19
idx=ismember(A,-20)
A1=A(~idx)
A2=sum(idx)

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