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How do i create a matrix of size 1 row and 1501 column, with values [1 -1 1 -1 1 -1.... etc

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ken thompson
ken thompson 2012-5-1
(countinuously 1 then -1 repeating.
thanks Dan

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回答（3 个）

Bjorn Gustavsson
Bjorn Gustavsson 2012-5-1
v = (-1).^(0:n);
HTH
Wayne King
Wayne King 2012-5-1
One way:
x = ones(1,1501);
x(2:2:end) = -1*x(2:2:end);
Another way
y = repmat([1 -1],1,751);
y(end) = [];
Daniel Shub
Daniel Shub 2012-5-1
[repmat([1,-1], 1, floor(1501/2)), 1]

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