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

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Doron
Doron am 23 Feb. 2012
Bearbeitet: Matt J am 22 Okt. 2013
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 am 23 Feb. 2012
  4 Kommentare
Sean de Wolski
Sean de Wolski am 23 Feb. 2012
We should sell floating point awareness tin foil hats.
Walter Roberson
Walter Roberson am 23 Feb. 2012
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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