Multiplying Vector by Constant that Depends on Vector Elements

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Kyle
Kyle 2011-11-2
Given a vector containing values 1 through 1000, I would like to multiply the vector elements by constant C1 if they range from 1-100, by constant C2 if they range from 100-200, etc...
Is there a simpler way to do this than iterating through the vector?
for i = 1:size(vector,2);
if vector(i) < 100
C = C1;
else if vector(i) < 200
C = C2;
end
result(i) = vector(i) * C;
end

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采纳的回答

Jan
Jan 2011-11-2
Mult = ones(size(vector));
Mult(vector < 200) = C2; % The largest limit at first!
Mult(vector < 100) = C1;
result = vector .* Mult;
  2 个评论
Jan
Jan 2011-11-3
There have been some other good solutions which perform the distribution to the different intervals automatically. Unfortunately they have been deleted.
The 2nd output of HISTC could be useful also.
Andrei Bobrov
Andrei Bobrov 2011-11-3
vector=randi([1 100],38,1);
[~,b] = histc(vector,0:100:1000);
C = randi(125,10,1);
result = C(b).*vector;

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