generic-library/opencv
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

skip of table header in MLData (#1962)

Browse Source
This commit is contained in:
Maria Dimashova
2012-05-19 14:34:36 +00:00
parent 094c32ced7
commit 4d36be8794
3 changed files with 40 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
modules/ml/doc/mldata.rst
View File

@@ -3,7 +3,7 @@ MLData
.. highlight:: cpp
For the machine learning algorithms, the data set is often stored in a file of the ``.csv``-like format. The file contains a table of predictor and response values where each row of the table corresponds to a sample. Missing values are supported. The UC Irvine Machine Learning Repository (http://archive.ics.uci.edu/ml/) provides many data sets stored in such a format to the machine learning community. The class ``MLData`` is implemented to easily load the data for training one of the OpenCV machine learning algorithms. For float values, only the ``'.'`` separator is supported.
For the machine learning algorithms, the data set is often stored in a file of the ``.csv``-like format. The file contains a table of predictor and response values where each row of the table corresponds to a sample. Missing values are supported. The UC Irvine Machine Learning Repository (http://archive.ics.uci.edu/ml/) provides many data sets stored in such a format to the machine learning community. The class ``MLData`` is implemented to easily load the data for training one of the OpenCV machine learning algorithms. For float values, only the ``'.'`` separator is supported. The table can have a header and in such case the user have to set the number of the header lines to skip them duaring the file reading.
CvMLData
--------
@@ -182,6 +182,20 @@ Sets the variables types in the loaded data.
In the string, a variable type is followed by a list of variables indices. For example: ``"ord[0-17],cat[18]"``, ``"ord[0,2,4,10-12], cat[1,3,5-9,13,14]"``, ``"cat"`` (all variables are categorical), ``"ord"`` (all variables are ordered).
CvMLData::get_header_lines_number
---------------------------------
Returns a number of the table header lines.
.. ocv:function:: int CvMLData::get_header_lines_number() const
CvMLData::set_header_lines_number
---------------------------------
Sets a number of the table header lines.
.. ocv:function:: void CvMLData::set_header_lines_number( int n )
By default it is supposed that the table does not have a header, i.e. it contains only the data.
CvMLData::get_var_type
----------------------
Returns type of the specified variable