Need help with FOR loop with 3 indexes

2011 4 13
3 个回答
6 次查看（30 天）

0 个投票

I need help with FOR loop with three indexes (i, j, k). Each index varies from 0 to 100 in 10 increments. However these 3 indexes need to add to 100 therefore ignoring any combinations which do not add to 100. There are 66 combinations which add to 100. Basically I just want to loop through all these 66 combinations.
For example i = 0, j = 10, k = 90 i = 0, j = 20, k = 80 i = 0, j = 30, k = 70 and so on.
Any suggestions would be greatly appreciated.

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回答（3 个）

Andrei Bobrov
Andrei Bobrov 2011-4-13

3 个投票

is the same, without loop
[k2,i2,j2] = meshgrid(0:10:100);
s2 = [i2(:) j2(:) k2(:)];
a2 = s2(sum(s2,2)==100,:);
Jan
Jan 2011-4-13

1 个投票

Another loop version - but I've voted the MESHGRID approach of abobroff.
a = [];
for i = 0:10:100
for j = 0:10:100
k = 100 - i - j;
if k >= 0
a = [a; i, j ,k];
else
break;
end
end
end
Paulo Silva
Paulo Silva 2011-4-13

0 个投票

a=[];
for i=0:10:100
for j=0:10:100
for k=0:10:100
s=i+j+k;
if s==100
a=[a; i j k];
end
end
end
end
The code gives you the variable a that contains the values of i j k that satisfy your condition.

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