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[Octave-bug-tracker] [bug #39689] mod function is not correct
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From: |
Rik |
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Subject: |
[Octave-bug-tracker] [bug #39689] mod function is not correct |
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Date: |
Sun, 04 Aug 2013 14:11:40 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:22.0) Gecko/20100101 Firefox/22.0 |
Update of bug #39689 (project octave):
Status: None => Invalid
Open/Closed: Open => Closed
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Follow-up Comment #1:
This is not a bug, just an issue with how integers are represented in floating
point format. See the bitmax() function for the largest integer that can be
represented in an IEEE double. It is 2^53-1 or ~9e15. Your number is bigger
than that and so it can't be represented correctly as an integer. However,
this is what the integer class is for.
Try
bitmax
ans = 9.0072e+15
x = uint64 (1e16);
mod (x, 17)
ans = 1
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Reply to this item at:
<http://savannah.gnu.org/bugs/?39689>
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