"measure sasa" not setting attribute?

[Elaine Meng]

After I open any protein and then use

measure sasa protein setAttribute true

(or without the latter option which is supposed to be default true)
... I still can't color by that attribute:

color byattribute area palette piyg
No known/registered attribute area

Did I get the attribute name wrong? It's in the documentation.

[Tom Goddard]

The measure sasa code appears to be setting atom.area and residue.area attributes in Python. Perhaps the area attribute also has to be registered in some way for color byattribute to work. Eric would know the answer to that.

[pett]

Yes, in order for an attribute to be used in that command (and to be saved in sessions!) it has to be registered. Register it with:

Atom.register_attr(session, "area", "Measure SASA", attr_type=float)
Residue.register_attr(session, "area", "Measure SASA", attr_type=float)

The 3rd argument is used in informative error messages in the unlikely case of registration of the same attribute name with different types.

[Tom Goddard]

Fixed.

Registered area attribute so color byattribute knows about it.