Routines (alphabetical) > Routines: H > HDF Routines > HDF_GR_FINDATTR

# HDF_GR_FINDATTR

This function finds the index of an HDF data object's attribute given its attribute name. HDF_GR_FINDATTR returns the index of the attribute whose name is specified by the parameter attr_name for the object identified by the parameter obj_id.

## Syntax

Result = HDF_GR_FINDATTR(obj_id, attr_name)

## Return Value

Returns the index of the attribute if successful or FAIL (-1) otherwise.

## Arguments

### obj_id

Raster image identifier (ri_id), returned by HDF_GR_CREATE or HDF_GR_SELECT, or HDF GR interface identifier (gr_id), returned by HDF_GR_START.

### attr_name

Name of the attribute.

## Keywords

None

## Version History

5.2 | Introduced