number of non nan observations

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joseph Frank
joseph Frank 2011-7-31
Hi,
I have a matrix for which i need for each row to compute the number of non nan observations . such routine is occurring frequently in my program. I am wondering if it is possible to compute it without any loop. for example
0.81 0.10 NaN
0.91 NaN 0.97
0.91 NaN 0.97
NaN 0.55 0.96
0.91 0.96 0.49
NaN NaN NaN
is it possible to get [2;2;2;2;3;0] without running a loop?

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采纳的回答

Oleg Komarov
Oleg Komarov 2011-7-31
sum(~isnan(In),2)

更多回答（1 个）

the cyclist
the cyclist 2011-7-31
sum(not(isnan(x)),2)

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