"uniques" giving duplicates... Matlab adding a tiny sum?

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Doron
Doron 2012-2-23
编辑： Matt J 2013-10-22
When I look for the unique values of P in column 1, i get a duplicated 0.975...
Somewhere along the line, Matlab probably decided to add a 1 x 10^-28 to some of the cells or something!
I want the 0.975's to be the same, so that on a graph & legend, I no longer get duplicated lines.
:-)
Cause?
Solution?
Doron
>> PU = unique(P(:,1))
PU = ... 0.7000 0.8000 0.9000 0.9250 0.9500 0.9750 0.9750 1.0000

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Walter Roberson
Walter Roberson 2012-2-23
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Sean de Wolski
Sean de Wolski 2012-2-23
We should sell floating point awareness tin foil hats.
Walter Roberson
Walter Roberson 2012-2-23
In some of my earlier incarnations, I had to assume that there might be compiler bugs in the floating point calculations. Not that such bugs were at all *common*, but you wouldn't want to bet someone's safety on the assumption that there were no invisible glitches.

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