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matlab.io.hdfeos.gd.readField

Namespace: matlab.io.hdfeos.gd

Read data from grid field

Syntax

data = readField(gridID,fieldname)
data = readField(gridID,fieldname,start,count)
data = readField(gridID,fieldname,start,count,stride)
[data,lat,lon] = readField(___)

Description

data = readField(gridID,fieldname) reads the entire grid field identified by fieldname in the grid identified by gridID.

data = readField(gridID,fieldname,start,count) reads a contiguous hyperslab of data from the field. start specifies the zero-based starting index of the hyperslab. count specifies the number of values to read along each dimension.

data = readField(gridID,fieldname,start,count,stride) reads a strided hyperslab of data from the field. stride specifies the inter-element spacing along each dimension.

[data,lat,lon] = readField(___) reads the data and the associated geo-coordinates from the grid field. This syntax is only allowed when the leading two dimensions of the grid are 'XDim' and 'YDim'.

This function corresponds to the GDreadfield function in the HDF-EOS library C API.

Examples

Read the data, latitude, and longitude for the 'ice_temp' field.

import matlab.io.hdfeos.*
gfid = gd.open('grid.hdf');
gridID = gd.attach(gfid,'PolarGrid');
[data,lat,lon] = gd.readField(gridID,'ice_temp');
gd.detach(gridID);
gd.close(gfid);

Read only the first 4x4 hyperslab of data, latitude, and longitude for the 'ice_temp' field.

import matlab.io.hdfeos.*
gfid = gd.open('grid.hdf');
gridID = gd.attach(gfid,'PolarGrid');
[data2,lat2,lon2] = gd.readField(gridID,'ice_temp',[0 0], [4 4]);
gd.detach(gridID);
gd.close(gfid);

See Also