truncating a long for loop
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i wrote a program and it includes a for loop, on running this program matlab says the "for loop is too long, truncating to..."
what does this mean and how does it affect my program?
回答（1 个）
Jos (10584)
2012-11-30
编辑：Jos (10584)
2012-11-30
Similar to this?
N = Inf ;
for k=1:N,
if k > 10, break ; end
end
which will get you a warning: Warning: FOR loop index is too large. Truncating to 9223372036854775807.
So, check your N!
2 个评论
Here truncating mean, that the FOR loop cannot "carry" such a large index vector. This is a problem of the internal representation of numbers.
Imagine the processing of a loop iteration takes 1e-3 seconds (a fair assumption). How long will it take to perform 2^41 iterations?
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