I need help with Probability function.

2013 4 24
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Hey guys, I need to generate a function called "produce" that will return either "peach", "panana", or "papaya" based on their probabilities of 0.20, 0.35, and 0.45 respectively. This is what I have:
function x = produce
A = 1e5;
B = rand;
C = ceil(A*B)
if (1 <= C <= 20000)
C = 'peach';
elseif ( 20001 <= C <= 55000)
C = 'panana';
elseif (55001 <= C <= 100000)
C = 'papaya';
end
x = C
For some reason, it only generates a return of "peach" no matter what the number is. It won't return panana or papaya when it's in their number range. Please help if you can. Thanks!

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Wayne King
Wayne King 2013-4-24
编辑：Wayne King 2013-4-24

1 个投票

You can't specify inequalities in a computer language like you write them down on a piece on a paper.
if (C >=1 && C <= 20000)
function x = produce
A = 1e5;
B = rand;
C = ceil(A*B)
if (C>=1 && C<= 20000)
C = 'peach';
elseif (C>= 20001 && C<= 55000)
C = 'panana';
elseif (C >= 55001)
C = 'papaya';
end
x = C
I would also suggest that you don't assign C which is originally a number a string, why not just assign x directly?
if (C>=1 && C<= 20000)
x = 'peach';
and so on?

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