From 3836f30c20b0a5c32bb1b9025f83c2f18c0da313 Mon Sep 17 00:00:00 2001
From: Theophile GENTILHOMME <tgentilhomme@jurasix08.idiap.ch>
Date: Tue, 20 Mar 2018 08:33:42 +0100
Subject: [PATCH] Add generic loading function and corresponding test
---
bob/measure/data/data.txt | 1000 +++++++++++++++++++++++++++++++++++++
bob/measure/load.py | 47 ++
bob/measure/test_load.py | 24 +
3 files changed, 1071 insertions(+)
create mode 100644 bob/measure/data/data.txt
create mode 100644 bob/measure/load.py
create mode 100644 bob/measure/test_load.py
diff --git a/bob/measure/data/data.txt b/bob/measure/data/data.txt
new file mode 100644
index 0000000..7e7562c
--- /dev/null
+++ b/bob/measure/data/data.txt
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diff --git a/bob/measure/load.py b/bob/measure/load.py
new file mode 100644
index 0000000..aae5db7
--- /dev/null
+++ b/bob/measure/load.py
@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+# vim: set fileencoding=utf-8 :
+# Mon 23 May 2011 16:23:05 CEST
+
+"""A set of utilities to load score files with different formats.
+"""
+
+import logging
+import numpy
+
+LOGGER = logging.getLogger('bob.measure')
+
+def split(filename):
+ """split(filename) -> negatives, positives
+
+ Loads the scores from the given file and splits them into positive
+ and negative arrays. The file must be a two columns file where the first
+ column contains -1 or 1 (for negative or positive respectively) and the
+ second the corresponding scores.
+
+ Parameters
+ ----------
+ filename: :py:class:`str`, ``file-like``:
+ The file object that will be opened with :py:func:`open_file` containing
+ the scores.
+
+ Returns
+ -------
+ negatives: 1D :py:class:`numpy.ndarray` of type float
+ This array contains the list of negative scores
+
+ positives: 1D :py:class:`numpy.ndarray` of type float
+ This array contains the list of positive scores
+
+ """
+ try:
+ columns = numpy.loadtxt(filename)
+ neg_pos = columns[:, 0]
+ scores = columns[:, 0]
+ except:
+ LOGGER.error('''Cannot read {}. This file must be a two columns file with
+ the first column containing -1 or 1 (i.e. negative or
+ positive) and the second the scores
+ (float).'''.format(filename))
+ return None, None
+ return (scores[numpy.where(neg_pos == -1)],
+ scores[numpy.where(neg_pos == 1)])
diff --git a/bob/measure/test_load.py b/bob/measure/test_load.py
new file mode 100644
index 0000000..e82222d
--- /dev/null
+++ b/bob/measure/test_load.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+# vim: set fileencoding=utf-8 :
+# Andre Anjos <andre.anjos@idiap.ch>
+# Wed 11 Dec 15:14:08 2013 CET
+#
+# Copyright (C) 2011-2013 Idiap Research Institute, Martigny, Switzerland
+
+"""Tests the IO functionality of bob.measure."""
+
+from nose.tools import assert_equal
+import bob.measure.load
+import bob.io.base.test_utils
+
+
+def test_split():
+ # This function test loading for generic bob.measure input files
+
+ # Read test file
+ test_file = bob.io.base.test_utils.datafile(
+ 'data.txt', 'bob.measure')
+ neg, pos = bob.measure.load.split(test_file)
+ assert neg is not None
+ assert_equal(len(neg), 521)
+ assert_equal(len(pos), 479)
--
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