How to extract the data from .nc file based on longitude and latitude,time?
12 views (last 30 days)
Show older comments
Hi, I have to extract the data from netcdf file based on lat,long and time. I have written the following code.
ncid = netcdf.open('\C:\Users\divecha21\Desktop\errorBar\tasmax_day_BNU-ESM_rcp85_r1i1p1_20060101-21001231.nc','NC_NOWRITE');
peaksData = ncinfo('\C:\Users\divecha21\Desktop\errorBar\tasmax_day_BNU-ESM_rcp85_r1i1p1_20060101-21001231.nc','tasmax');
ncdisp('\C:\Users\divecha21\Desktop\errorBar\tasmax_day_BNU-ESM_rcp85_r1i1p1_20060101-21001231.nc','tasmax');
[ndim, nvar, natt, unlim] = netcdf.inq(ncid)
[dimname, dimlength] = netcdf.inqDim(ncid, 0)
[dimname, dimlength] = netcdf.inqDim(ncid, 1)
[dimname, dimlength] = netcdf.inqDim(ncid, 2)
lon = netcdf.getVar(ncid,0,0,128)
%time = netcdf.getVar(ncid,2,0,34675)
lat = netcdf.getVar(ncid,1,0,64)
latlim = [5.25 36.75];
lonlim = [60.25 97.25];
precJanuary = netcdf.getVar(ncid,2,[60.25 5.25 1],[97.25 36.75 1]);
Actually I have global temperature data i have to extract only india. After execution,I got the following error.
>> sample1
Error using ncread Expected start to be integer-valued.
Error in internal.matlab.imagesci.nc/read (line 557) validateattributes(start,{'numeric'},...
Error in ncread (line 58) vardata = ncObj.read(varName, varargin{:});
Error in sample1 (line 27) precJanuary = ncread('\C:\Users\divecha21\Desktop\errorBar\tasmax_day_GFDL-ESM2M_rcp85_r1i1p1_20060101-20101231.nc','tasmax',[60.25 5.25 1],[97.25 36.75 1]);
Can any one help me to clear this? I am new to matlab.
Thank you
5 Comments
Mohnish sinha
on 10 Nov 2014
will you please write the revised code for extracting nc files, I am looking for the data for India...
Accepted Answer
Ashish Uthama
on 20 May 2014
Edited: Ashish Uthama
on 20 May 2014
The nc* functions and the netcdf.* functions represent two independent ways to access a NetCDF file. I would recommend sticking to nc* functions until you get comfortable enough to directly access the NetCDF library interface using the netcdf.* functions (it uses C style indexing and dimension ordering which is different from what nc* functions report and use).
Instead of
precJanuary = netcdf.getVar(ncid,2,[0 0 0],[128 64 1]);
try
precJanuary = ncread(filename, varname,[1 1 1],[128 64 1]);
3 Comments
Jonas Damsbo
on 27 Dec 2018
I try to use your code line:
z = ncread(ncfiles(i).name,'z',[1 1 1],[360 181 1]);
But I got the error:
Index exceeds array bounds. Why?
More Answers (0)
See Also
Categories
Find more on NetCDF in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!