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## Re: handling NaN

 From: John W. Eaton Subject: Re: handling NaN Date: Mon, 5 Aug 2002 22:47:14 -0500

```On  6-Aug-2002, Schloegl Alois <address@hidden> wrote:

| | Here is how I would solve this problem--one extra line of code, MATLAB
| | compatible too:
| |
| |
| | octave:14> f = [1 2 3 NaN]
| | f =
| |
| |     1    2    3  NaN
| |
| | octave:15> idx = find(~isnan(f));
| | octave:16> max(f(idx))
| | ans = 3
|
| But without using loops, is there also a way to do this along a
| particular dimension of a matrix when each column/row/etc. may have a
| different number of NaNs?
|
| jwe
|
|
| ------------------------------------------------------
|
| John,
|
| I guess this would do it:
|
| f(isnan(f))=-inf;
| max(f);
| max(f');

Right, Paul also pointed out to me in email that the nanmax and
nanmean functions in octave-forge use this method.

Thanks,

jwe

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