Ignore case - Revision history

Bell: 1 revision

2016-03-07T03:47:36Z

1 revision

Speleo3: 1.8.0.5

2016-02-08T23:31:35Z

1.8.0.5

Bell: 2 revisions

2016-02-08T05:26:40Z

2 revisions

Speleo3: 1.8 default

2016-02-02T19:29:13Z

1.8 default

Speleo3: 1.8

2016-01-28T18:27:45Z

1.8

Bell: 1 revision

2015-07-09T20:23:58Z

1 revision

Speleo3: created

2015-07-07T17:50:45Z

created

New page

The [[ignore_case]] setting (default: '''on''') controls whether PyMOL does case sensitive matching of atomic identifiers and selection operators in the selection language. Most notably, it affects whether chain identifiers are matched case sensitive, which becomes relevant when using upper and lower case chain identifiers in a structure with more than 26 chains.

''The default value was changed to '''off''' in Open-Source PyMOL svn revision 4123 (unstable version 1.7.7.1) and will also be changed in the next official release. With more and more "big" structures in the PDB, the old default was not practical anymore and led to confusion and unexpected results.''

== Example ==

Load 1a00 which has chains A, B, C, D

PyMOL>fetch 1a00, async=0

1) case insensitive selection language (default for PyMOL <= 1.7.6)

PyMOL>set ignore_case
Setting: ignore_case set to on.
PyMOL>count_atoms chain A
count_atoms: 1164 atoms
PyMOL>count_atoms chain a
count_atoms: 1164 atoms

2) case sensitive selection language (default for PyMOL > 1.7.6)

PyMOL>set ignore_case, off
Setting: ignore_case set to off.
PyMOL>count_atoms chain A
count_atoms: 1164 atoms
PyMOL>count_atoms chain a
count_atoms: 0 atoms

== Best Practice for Scripting ==

When writing scripts or plugins, all selection expressions should be strict about case (e.g. "name CA" and not "name ca") to not depend on the users setting of [[ignore_case]].

[[Category:Settings]]
[[Category:Selecting]]

@@ Line 1: / Line 1: @@
-The [[ignore_case]] setting (default: '''off''' in PyMOL 1.8, '''on''' in previous versions) controls whether PyMOL does case sensitive matching of atomic identifiers and selection operators in the selection language. Most notably, it affects whether chain identifiers are matched case sensitive, which becomes relevant when using upper and lower case chain identifiers in a structure with more than 26 chains.
+The [[ignore_case]] setting (default: '''on''', ''except in PyMOL 1.8.0.0 - 1.8.0.4'') controls whether PyMOL does case sensitive matching of atomic identifiers and selection operators in the selection language. Most notably, it affects whether chain identifiers are matched case sensitive, which becomes relevant when using upper and lower case chain identifiers in a structure with more than 26 chains.
-''The default value was changed to '''off''' in PyMOL 1.8. With more and more "big" structures in the PDB, the old default was not practical anymore and led to confusion and unexpected results.''
+<div style="padding: 10px 20px; border: 1px solid #c33; background-color: #fcc">
 == Example ==
@@ Line 9: / Line 15: @@
   PyMOL>fetch 1a00, async=0
-) case insensitive selection language (default for PyMOL <= 1.7.6)
+) case insensitive selection language (default for PyMOL <= 1.7.6 and >= 1.8.0.5)
   PyMOL>set ignore_case
@@ Line 18: / Line 24: @@
    count_atoms: 1164 atoms
-) case sensitive selection language (default for PyMOL > 1.7.6)
+) case sensitive selection language (default for PyMOL 1.8.0.0 - 1.8.0.4)
   PyMOL>set ignore_case, off

← Older revision		Revision as of 19:29, 2 February 2016
Line 1:		Line 1:
−	The [[ignore_case]] setting (default: '''on''') controls whether PyMOL does case sensitive matching of atomic identifiers and selection operators in the selection language. Most notably, it affects whether chain identifiers are matched case sensitive, which becomes relevant when using upper and lower case chain identifiers in a structure with more than 26 chains.	+	The [[ignore_case]] setting (default: '''off''' in PyMOL 1.8, '''on''' in previous versions) controls whether PyMOL does case sensitive matching of atomic identifiers and selection operators in the selection language. Most notably, it affects whether chain identifiers are matched case sensitive, which becomes relevant when using upper and lower case chain identifiers in a structure with more than 26 chains.

	''The default value was changed to '''off''' in PyMOL 1.8. With more and more "big" structures in the PDB, the old default was not practical anymore and led to confusion and unexpected results.''		''The default value was changed to '''off''' in PyMOL 1.8. With more and more "big" structures in the PDB, the old default was not practical anymore and led to confusion and unexpected results.''

← Older revision	Revision as of 03:47, 7 March 2016
(No difference)

← Older revision	Revision as of 05:26, 8 February 2016
(No difference)

← Older revision	Revision as of 20:23, 9 July 2015
(No difference)