Man page for select
NAME
scatter - select a subset of samples and/or features from a dataset
SYNOPSIS
pymvpa2
select [
--version] [
-h]
-i DATASET [
DATASET ...] [
--samples-by-index IDX [
IDX ...]
| --samples-by-attr EXPR [
EXPR ...]] [
--features-by-index IDX [
IDX ...]
| --features-by-attr EXPR [
EXPR ...]] [
--strip-sa ATTR [
ATTR ...]] [
--strip-fa ATTR [
ATTR ...]] [
--strip-da ATTR [
ATTR ...]]
-o OUTPUT [
--hdf5-compression TYPE]
DESCRIPTION
scatter not available: No module named _tkinter, please install the python-tk package
Select a subset of samples and/or features from a dataset
A subset of samples and/or feature can be selected by their indices (see
--samples/features-by-index) or via simple expressions evaluating attribute
value (see --samples/features-by-attr). It is possible to specify options
for selecting samples and features simultaneously. It is also possible to strip
arbitrary attributes from the output dataset (see --strip-...).
SELECTION BY INDEX
All --...-by-index options accept a sequence of integer indices. Alternatively
it is possible to specify regular sequences of indices using a START:STOP:STEP
notation (zero-based). For example, ':5' selects the first five elements, '2:4'
selects the third and fourth element, and ':20:2' selects all even numbered
elements from the first 20.
SELECTION BY ATTRIBUTE
All --...by-attr options support a simple expression language that allows for
creating filters/masks from attribute values. Such selection expressions are
made up of ATTRIBUTE OPERATOR VALUE triplets that can be combined via 'and' or
'or' keywords. For example:
... --samples-by-attr subj eq 5 and run lt 5 or run gt 10
selects all samples where attribute 'subj' equals 5 and the run attribute is
either less than 5 or greater than 10. 'and' and 'or' operations are done in
strictly serial order (no nested conditions).
Supported operators are:
eq (equal)
ne (not equal)
ge (greater or equal)
le (less or equal)
gt (greater than)
lt (less than)
OPTIONS
- --version
-
show program's version and license information and
exit
- -h, --help, --help-np
-
show this help message and exit. --help-np forcefully
disables the use of a pager for displaying the help.
- -i DATASET [DATASET ...], --input DATASET [DATASET ...]
-
path(s) to one or more PyMVPA dataset files. All
datasets will be merged into a single dataset
(vstack'ed) in order of specification. In some cases
this option may need to be specified more than once if
multiple, but separate, input datasets are required.
Options for selecting samples:
- --samples-by-index IDX [IDX ...]
-
select a subset of samples by index. See section
'SELECTION BY INDEX' for more details.
- --samples-by-attr EXPR [EXPR ...]
-
select a subset of samples by attribute evaluation.
See section 'SELECTION BY ATTRIBUTE' for more details.
Options for selecting features:
- --features-by-index IDX [IDX ...]
-
select a subset of features by index. See section
'SELECTION BY INDEX' for more details.
- --features-by-attr EXPR [EXPR ...]
-
select a subset of features by attribute evaluation.
See section 'SELECTION BY ATTRIBUTE' for more details.
Options for removing attributes:
- --strip-sa ATTR [ATTR ...]
-
strip one or more samples attributes given by their
name from a dataset.
- --strip-fa ATTR [ATTR ...]
-
strip one or more feature attributes given by their
name from a dataset.
- --strip-da ATTR [ATTR ...]
-
strip one or more dataset attributes given by their
name from a dataset.
Output options:
- -o OUTPUT, --output OUTPUT
-
output filename ('.hdf5' extension is added
automatically if necessary). NOTE: The output format
is suitable for data exchange between PyMVPA commands,
but is not recommended for long-term storage or
exchange as its specific content may vary depending on
the actual software environment. For long-term storage
consider conversion into other data formats (see
'dump' command).
- --hdf5-compression TYPE
-
compression type for HDF5 storage. Available values
depend on the specific HDF5 installation. Typical
values are: 'gzip', 'lzf', 'szip', or integers from 1
to 9 indicating gzip compression levels.
pymvpa2-select 2.6.4
AUTHOR
Written by Michael Hanke & Yaroslav Halchenko, and numerous other contributors.
COPYRIGHT
Copyright © 2006-2016 PyMVPA developers
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.