How to skip rows when loading data from a netcdf file

Hi, I am reading temperature data from a netcdf file that is a (720x360x744) matrix (it depends on longitude, latitude and time). For the latitude and longitude I only use one row depending on which city I am looking at. The temperature is measured several times a day for one month but I only want to get one measure per day. Is there a way for me to skip some rows in the last column? I want only every 24 rows, I want row 25,49,73 etc. not the ones in between.

My code so far is :

 [varname, xtype, varDimIDs, varAtts] = netcdf.inqVar(Ncid111,3);
varid = netcdf.inqVarID(Ncid111,varname);
 airtemp = netcdf.getVar(Ncid111,varid');
mydata=airtemp(220,114,1:744)

This gives me the whole TIME column (measures 1 through 744) but I only want every 24th measure.

Thank you for your help!!

Answer 1

[Kelly Kearney]

Take a look at the start, count, and stride inputs that are associated with most netcdf methods, including getVar. For example,

mydata = netcdf.getVar(Ncid111, varid, [220 114 1], [1 1 Inf], [1 1 24]);

What version of Matlab are you running? If it's relatively recent, you can simplify things by using ncread:

mydata = ncread('file.nc', varname, [220 114 1], [1 1 Inf], [1 1 24]);

[Celine Boulenger]

Thank you!