Hi -
I don't know matlab, but I find it hard to imagine that it couldn't
handle netCDF files that have some other missing-data flag. Aren't
there tools within Matlab and its NetCDF handling code to do
something with the missing-data flag in the netCDF file?
A quick Google search turned up this, which seems to have some
commands to do this. Look for "Replace Missing Numbers (if
necessary)"
http://www.mathworks.com/matlabcentral/fileexchange/26644-reading-and-animating-a-netcdf-file-of-sea-surface-temperature/content/NetCDF_and_SeaSurfaceTemperatureFiles/read_sst.m
On 6/21/2011 7:03 AM, Sam Rabin wrote:
Thanks folks! I will give this a try. My backup plan
is to export the data as an ASCII file, then use a text editor to
find-and-replace all missing values with NaN, then just import
that into MatLab.
And yes, of course it turns out I do have missing(). I
must have misinterpreted the output I got when I used the
command incorrectly.
Thanks again,
Sam
Rabin
Graduate student
Princeton University
Ecology & Evolutionary Biology
On Jun 20, 2011, at 8:16 PM, Ryo Furue wrote:
Hi,
| > Hello! I am trying to analyze a NetCDF file in
MatLab, and
| > I would like to change all "missing" values in
the dataset
| > to NaN for compatibility. This would probably be
trivial
| > if the missing()
[. . .]
| Perhaps somebody can
| tell us whether the NCO operators will let you do
this.
It seems to me that you may be able to trick ncap2 into
doing that. I say this because I don't see a legitimate
way to generate a NaN in the ncap2 language. If ncap2
passes values to its math backend without checking,
things like "sqrt(-1.0)" and "0.0/0.0" may generate
NaNs.
I haven't tested this idea.
Regards,
Ryo
|