netcdf function is not working and the program keep showing this message

2015 1 9
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更新时间：2015 1 15
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netcdf function is not working and the program keep showing this message ??? Undefined function or method 'netcdf' for input arguments of type 'char'.

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per isakson
per isakson 2015-1-9
编辑：per isakson 2015-1-9
See documentation on netcdf
and check what
which netcdf -all
returns
Adam
Adam 2015-1-9
Try adding some useful tags to your question if you expect people to provide help.
Geoff Hayes
Geoff Hayes 2015-1-10
Hossam - did you follow Per's instructions from the comment above? What was the result of calling which? How are you calling this function? Please copy and paste the commands that you are using that lead to this error message. Also state your version of MATLAB.
hossam mohamed
hossam mohamed 2015-1-11
编辑：Geoff Hayes 2015-1-11
My version of Matlab is 7.10.0 (R2010a) when i copy it , this message showed out
M-files in directory C:\Program Files\MATLAB\R2010a\toolbox\matlab\imagesci\+netcdf
Contents getAtt inqDimID renameDim
abort getConstant inqLibVers renameVar
close getConstantNames inqVar setDefaultFormat
copyAtt getVar inqVarID setFill
create inq open sync
defDim inqAtt putAtt
defVar inqAttID putVar
delAtt inqAttName reDef
endDef inqDim renameAtt
-all not found.
hossam mohamed
hossam mohamed 2015-1-11
the command that i am using is (netcdf(file_name);)
hossam mohamed
hossam mohamed 2015-1-11
even the command (ncdisp(file_name);) is not working and it is showing this message (??? Undefined function or method 'ncdisp' for input arguments of type 'char'.)

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Mohammad Abouali
Mohammad Abouali 2015-1-11
编辑：Mohammad Abouali 2015-1-11

0 个投票

Well, you are using the command wrong.
netcdf(file_name) is not a command.
Note that MATLAB version 2010a was only supporting the kinda one-to-one mapping of (C/FORTRAN) NetCDF api. Recent versions of matlab have other commands that are much easier to read and write a netcdf file. for example ncdisp is not supported in MATLAB 2010a. Neither is ncread.
In that older API you can read a file like this:
% Open the NetCDF file
ncid = netcdf.open('example.nc','NC_NOWRITE');
% returning information from the files:
[ndims,nvars,ngatts,unlimdimid] = netcdf.inq(ncid)
% getting information about a variable
%varid is an integer from 1 to nvars (nvars is the output of previous command.
[varname,xtype,dimids,natts] = netcdf.inqVar(ncid,varid)
% Reading the entire variable
data = netcdf.getVar(ncid,varid)

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hossam mohamed
hossam mohamed 2015-1-14
Thank you, i will try to install the later version
hossam mohamed
hossam mohamed 2015-1-14
After writing these function, how can i show the real data of the netcdf file in matlab
Mohammad Abouali
Mohammad Abouali 2015-1-15
That's whole another question. The variable data is holding the information. Depending on what type it is, what it is, you can plot it different way.

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