Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / dataframe-0.9.1 / @dataframe / subsindex.m

diff --git a/octave_packages/dataframe-0.9.1/@dataframe/subsindex.m b/octave_packages/dataframe-0.9.1/@dataframe/subsindex.m
new file mode 100644 (file)
index 0000000..5f18b41
--- /dev/null
+++ b/octave_packages/dataframe-0.9.1/@dataframe/subsindex.m
@@ -0,0 +1,45 @@
+function resu = subsindex(df, base)
+  %# function resu = subsindex(df)
+  %# This function convert a dataframe to an index. Do not expect a
+  %# meaningfull result when mixing numeric and logical columns.
+
+  %% Copyright (C) 2009-2012 Pascal Dupuis <Pascal.Dupuis@uclouvain.be>
+  %%
+  %% This file is part of Octave.
+  %%
+  %% Octave is free software; you can redistribute it and/or
+  %% modify it under the terms of the GNU General Public
+  %% License as published by the Free Software Foundation;
+  %% either version 2, or (at your option) any later version.
+  %%
+  %% Octave is distributed in the hope that it will be useful,
+  %% but WITHOUT ANY WARRANTY; without even the implied
+  %% warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+  %% PURPOSE.  See the GNU General Public License for more
+  %% details.
+  %%
+  %% You should have received a copy of the GNU General Public
+  %% License along with Octave; see the file COPYING.  If not,
+  %% write to the Free Software Foundation, 51 Franklin Street -
+  %% Fifth Floor, Boston, MA 02110-1301, USA.
+  
+  %#
+  %# $Id: subsindex.m 9585 2012-02-05 15:32:46Z cdemills $
+  %#
+  
+  if nargin < 2, 
+    base = 1.0; 
+  else
+    base = base - 1.0;
+  endif
+  
+  %# extract all values at once
+  dummy = df_whole(df); 
+  if isa(dummy, 'logical'),
+    resu = sort(find(dummy)-base);
+    %# resu = dummy - base;
+  else
+    resu = dummy - base;
+  endif
+
+endfunction