Ignore:
Timestamp:
12/14/13 04:16:33 (4 months ago)
Author:
blaz <blaz.zupan@…>
Branch:
default
Message:

Updated documentation for the Save widget.

File:
1 edited

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  • docs/widgets/rst/data/file.rst

    r11810 r11812  
    2323.. _my-reference-label: 
    2424 
    25 Section to cross-reference 
    26 -------------------------- 
    27  
    28 This is the text of the section. 
    29  
    30 It refers to the section itself, see :ref:`my-reference-label`. 
    31  
    32  
    3325Description 
    3426----------- 
     
    3628File widget reads the input data file (data table with data instances) 
    3729and sends the data set to its output channel. It maintains 
    38 a history of most recently opened files. For convenience, the history also includes 
    39 a directory with the sample data sets that come pre-installed with Orange. 
     30a history of most recently opened files. For convenience, the history also 
     31includes a directory with the sample data sets that come 
     32pre-installed with Orange. 
    4033 
    4134The widget reads data from simple tab-delimited or comma-separated files, 
     
    7972    .. image :: images/spacer.png 
    8073 
    81 Tab-delimited data file can include user defined symbols for undefined values. The symbols for 
    82 "don't care" and "don't know" values can be specified in the corresponding edit lines.  
    83 The default values for "don't know" and "don't care" depend upon format. Most users will  
    84 use tab-delimited files: keep the field empty or put a question mark in there and that's  
    85 it. Most algorithms do not differ between don't know and don't care values, so consider  
    86 them both to mean undefined. 
     74Tab-delimited data file can include user defined symbols for undefined 
     75values. The symbols for "don't care" and "don't know" values can be 
     76specified in the corresponding edit lines.  The default values for 
     77"don't know" and "don't care" depend upon format. Most users will use 
     78tab-delimited files: keep the field empty or put a question mark in 
     79there and that's it. Most algorithms do not differ between don't know 
     80and don't care values, so consider them both to mean undefined. 
    8781 
    88 Orange will usually treat the attributes with the same name 
    89 but appearing in different files as the same attribute, so a classifier which uses the  
    90 attribute "petal length" from the first will use the attribute of the same name from  
    91 the second. In cases when attributes from different files just accidentally bear different  
    92 names, one can instruct Orange to either always construct new attribute or construct them when  
    93 they differ in their domains. Use the options on dealing with new attributes 
    94 with great care (if at all). 
     82Orange will usually treat the attributes with the same name but 
     83appearing in different files as the same attribute, so a classifier 
     84which uses the attribute "petal length" from the first will use the 
     85attribute of the same name from the second. In cases when attributes 
     86from different files just accidentally bear different names, one can 
     87instruct Orange to either always construct new attribute or construct 
     88them when they differ in their domains. Use the options on dealing 
     89with new attributes with great care (if at all). 
    9590 
    9691Example 
    9792------- 
    9893 
    99 Most Orange workflows would probably start with the File widget. In the schema below, 
    100 the widget is used to read the data that is sent to both :ref:`Data Table` widget and 
    101 to widget that displays :ref:`Attribute Statistics`. 
     94Most Orange workflows would probably start with the File widget. In 
     95the schema below, the widget is used to read the data that is sent to 
     96both :ref:`Data Table` widget and to widget that displays 
     97:ref:`Attribute Statistics`. 
    10298 
    10399.. image:: images/File_schema.png 
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