Does NaN used in confusion matrix affects results?
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Ekta Sharma
le 15 Juin 2016
Commenté : Chad Greene
le 17 Juin 2016
I have used confusion matrix and for making two matrices of equal dimensions I had used NaN but is it wise to use that? for example: A= [2 3 7 ]; B= [3 4 NaN]; C= A+B; C= 5 7 NaN I am getting where result should have been [5 7 7] according to me.Can anyone help? Thanx in advance.
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Chad Greene
le 16 Juin 2016
Here's one way:
C = nansum([A; B])
C =
5 7 7
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Chad Greene
le 17 Juin 2016
Using NaN as a place filler is often the best way to do it. The reason 1+NaN=NaN is because Matlab doesn't what the answer is if you add a number to something that is not a number. But the nansum function and its sisters (nanmean, nanmedian, etc) are available to simply ignore NaNs the way you want.
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