How can i decease one variable by 0.1; for increment of other variable by 0.5..?

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Darshan Joshi
Darshan Joshi 2017-2-19
评论： Matt J 2017-2-19
Say I have two variables(x&y). now for the increment of 0.5 in X; variable Y should decrease by 0.1. I have written this with IF condition. but it's lengthy. the code is as follow:
**************************************************
if temp >= 40
Iref=.9*AH;
end
if temp >= 40.5
Iref=.8*AH;
end
if temp >= 41
Iref=.8*AH;
end
if temp >= 41.5
Iref=.7*AH;
end
if temp >= 42
Iref=.6*AH;
end
if temp >= 42.5
Iref=.5*AH;
end
if temp >= 43
Iref=.4*AH;
end
if temp >= 43.5
Iref=.3*AH;
end
if temp >= 44
Iref=.2*AH;
end
if temp >= 44.5
Iref=.1*AH;
end
*******************************************************
please suggest some other short way to do this.

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回答（1 个）

Matt J
Matt J 2017-2-19
编辑：Matt J 2017-2-19
Iref=( (-0.1/0.5)*(temp-40)+0.9) *AH;
Iref=ceil( Iref/(0.1*AH) )*0.1*AH;
  2 个评论
Darshan Joshi
Darshan Joshi 2017-2-19
it decreases constantly like a line. I want the decrement in iref after every 0.5 increment in temp. I need output like this(output of the code written in question) :
Matt J
Matt J 2017-2-19
I've added a second line to discretize the output. Your plot however, does not match your code if AH is constant. Your code gives piecewise constant output whereas your plot is piecewise linear.

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