"uniques" giving duplicates... Matlab adding a tiny sum?
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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
采纳的回答
Walter Roberson
2012-2-23
0 个投票
4 个评论
Doron
2012-2-23
Walter Roberson
2012-2-23
Yup, again ;-) You will get to the point where you don't trust _any_ floating point comparison. Use liberal doses of paranoia in floating point computations.
Sean de Wolski
2012-2-23
We should sell floating point awareness tin foil hats.
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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