Regression with some part of the array

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Nathalie
Nathalie 2014-5-9
回答： Jakob Sørensen 2014-5-9
Suppose I have x vector=[ 1 5 6 7 8 3 2 ] and corresponding y vector [2 9 4 6 4 5 6].
How to run regression for y on x for x>3.
Thanks.

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Jakob Sørensen
Jakob Sørensen 2014-5-9
x = [ 1 5 6 7 8 3 2 ];
y = [ 2 9 4 6 4 5 6 ];
idx = find(x > 3); % Returns the indexes where x is larger than 3
plotregression(x(idx), y(idx)); % Only uses the indexes of the vectors, where x were larger than 3
Replace with other regression methods, depending on what you need.

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