1 # Copyright (C) 2009-2010 Fabrizio Benedetti
2 # Massimo Sandal <devicerandom@gmail.com>
3 # W. Trevor King <wking@drexel.edu>
5 # This file is part of Hooke.
7 # Hooke is free software: you can redistribute it and/or
8 # modify it under the terms of the GNU Lesser General Public
9 # License as published by the Free Software Foundation, either
10 # version 3 of the License, or (at your option) any later version.
12 # Hooke is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU Lesser General Public License for more details.
17 # You should have received a copy of the GNU Lesser General Public
18 # License along with Hooke. If not, see
19 # <http://www.gnu.org/licenses/>.
21 """The `cut` module provides :class:`CutPlugin` and
25 from ..command import Command, Argument, Failure
26 from ..plugin import Plugin
29 class CutPlugin (Plugin):
31 super(CutPlugin, self).__init__(name='cut')
37 # Define common or complicated arguments
39 def current_curve_callback(hooke, command, argument, value):
40 playlist = hooke.playlists.current()
42 raise Failure('No playlists loaded')
43 curve = playlist.current()
45 raise Failure('No curves in playlist %s' % playlist.name)
48 CurveArgument = Argument(
49 name='curve', type='curve', callback=current_curve_callback,
51 :class:`hooke.curve.Curve` to cut from. Defaults to the current curve.
57 class CutCommand (Command):
58 """Cut the selected signal between two points and write it to a file.
60 The data is saved in TAB-delimited ASCII text, where the first column
61 is "x" and the second is "y". There is no header row.
64 super(CutCommand, self).__init__(
68 Argument(name='block', aliases=['set'], type='int', default=0,
70 Data block to save. For an approach/retract force curve, `0` selects
71 the approacing curve and `1` selects the retracting curve.
73 Argument(name='bounds', type='point', optional=False, count=2,
75 Indicies of points bounding the selected data.
77 Argument(name='output', type='file', default='cut.dat',
79 File name for the output data.
84 def _run(self, hooke, inqueue, outqueue, params):
85 if params['curve'] == None:
86 params['curve'] = hooke.playlists.current().current()
88 i_min = min([p.index for p in params['points']])
89 i_max = max([p.index for p in params['points']])
91 data = params['curve'][params['bound']]
92 cut_data = data[i_min:i_max+1,:] # slice rows from row-major data
93 # +1 to include data[i_max] row
95 f = open(params['output'], 'w')
96 cut_data.tofile(f, sep='\t')