Single value from record in variable
datum = cdflib.getVarData(cdfId,varNum,recNum,indices)
datum = cdflib.getVarData(cdfId,varNum,recNum)
datum = cdflib.getVarData(cdfId,varNum,recNum,indices)
returns a single value from a variable in a Common Data Format (CDF)
file.
datum = cdflib.getVarData(cdfId,varNum,recNum)
returns a single value from a variable with no dimensions in a Common
Data Format (CDF) file.
|
Identifier of a CDF file, returned by a call to |
|
Numeric value identifying the variable containing the datum. Variable numbers are zero-based. |
|
Numeric value identifying the location of the datum in the variable. In CDF terminology, this is called the record number. Record numbers are zero-based. |
|
Array of dimension indices within the record. Dimension indices are zero-based. If the variable has no dimensions, you can omit this parameter. |
|
Value of the specified record. |
Open the example CDF file and retrieve data associated with a variable:
cdfid = cdflib.open('example.cdf');
% Determine how many variables are in the file.
info = cdflib.inquire(cdfid);
info.numVars
ans =
5
% Determine if the first variable has dimensions.
varinfo = cdflib.inquireVar(cdfid,0);
vardims = varinfo.dims
vardims =
[]
% Get data from variable, without specifying dimensions.
datum = cdflib.getVarData(cdfid, varnum, recnum)
datum =
6.3146e+013
% Get dimensions of another variable in file.
varinfo = cdflib.inquireVar(cdfid,3);
vardims = varinfo.dims
vardims =
[4 2 2]
% Retrieve the first datum in the record. Indices are zero-based.
datum = cdflib.getVarData(cdfId,3,0,[0 0 0])
info =
30
% Clean up.
cdflib.close(cdfid);
clear cdfidThis function corresponds to the CDF library C API routine CDFgetzVarData.
To use this function, you must be familiar with the CDF C
interface. Read the CDF documentation at the CDF website.
For copyright information, see the cdfcopyright.txt file.