Filter out negative values

2014 5 20
2 个回答
回答已采纳
更新时间：2014 5 21
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0 个投票

I have the following iterations running But how can I filter out the negative answer and the allow the program just to run on positive values
a=20000:5000:90000
for ct1=1:1:length(a)
b=300:20:460
for ct2=1:1:length(b)
c=150:10:300
for ct3=1:1:length(c)
d=0.5:0.1:0.8
for ct4=1:1:length(d)
e=2000:1000:2300
for ct5=1:1:length(e)
x(ct1,ct2,ct3,ct4,ct5)=a(ct1)+ b(ct2)- (c(ct3))^2 + d(ct4)+ e(ct5)
end
end
end
end
end

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 采纳的回答

Matt J
Matt J 2014-5-20
编辑：Matt J 2014-5-20

0 个投票

After x is generated,
x(x<0)=something;

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Arjun
Arjun 2014-5-20
ok let say the next function is y = x +32; but I wan only the positive value of x to go in the calculation.....each time the iteration above gives negative value of x it won't be used in order to calculate y.
Matt J
Matt J 2014-5-20
After the loops are done,
y(x>=0)=x(x>=0)+32;
Arjun
Arjun 2014-5-21
编辑：Arjun 2014-5-21
thanx alot fren....=)

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更多回答（1 个）

Mahdi
Mahdi 2014-5-20

1 个投票

You can try using the subplus function.
For example, you would use
x(ct1,ct2,ct3,ct4,ct5)=subplus(a(ct1)+ b(ct2)- (c(ct3))^2 + d(ct4)+ e(ct5))

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Arjun
Arjun 2014-5-20
ok let say the next function is y = x +32; but I wan only the positive value of x to go in the calculation.....each time the iteration above gives negative value of x it won't be used in order to calculate y.
Sean de Wolski
Sean de Wolski 2014-5-21
Learn something new every day.

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