Routines (alphabetical) > Routines: H > HDF-EOS Routines > EOS_PT_WRITEATTR

# EOS_PT_WRITEATTR

This function writes/updates an attribute in a point. If the attribute does not exist, it is created. If it does exist, then the value(s) is (are) updated.

## Examples

In this example, we write a single precision (32 bit) floating point number with the name “ScalarFloat” and the value 3.14:

f32 = 3.14f

status = EOS_PT_WRITEATTR(pointid, "ScalarFloat", f32)

We can update this value by simply calling the function again with the new value:

f32 = 3.14159

status = EOS_PT_WRITEATTR(pointid, "ScalarFloat", f32)

## Syntax

Result = EOS_PT_WRITEATTR( pointID, attrname, datbuf [, COUNT=value] [, HDF_TYPE=value] )

## Return Value

Returns SUCCEED (0) if successful and FAIL (–1) otherwise.

## Arguments

### pointID

Point id (long) returned by EOS_PT_CREATE or EOS_PT_ATTACH.

### attrname

Attribute name (string).

### datbuf

Attribute values.

## Keywords

### COUNT

Number of values (long) to store in attribute.

### HDF_TYPE

Number type (long) of attribute..

## Version History

5.2 | Introduced