How to extract only first few values of step function and perform arithmetic operations on those values?

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pooja
pooja 2015-1-4
回答： Sarah 2015-1-4
yr(i1,:) = step(tf1) - error part
for i2 = 1:N
yy(i1,i2) = yr(i1,i2)
end
j(i1,1:N) = (y0(1,:) - yy(i1,:)).^2 - error part
J(i1) = sum(j(i1))
Result of yr is a huge set of 1128 columns of values out of which i only want the first 10 or so and then how to subtact the corresponding of the set from another set and square the obtained results.

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回答（1 个）

Sarah
Sarah 2015-1-4
From what I understand of your question, you need only the first 10 columns of yr. If this is so, then I would run my loop only 10 times and store the values of the columns in another vector. Then I can perform whatever operations I need with it.
for i=1:10 vector(:,i)=yr(:,i) end

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