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old changes copied to trunk: description of tool 'Compute'

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Yi Zhang
2007-01-17 18:55:46 +00:00
parent 624037d52c
commit d418956bf9
1 changed files with 14 additions and 4 deletions
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tools/stats/column_maker.xml
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@@ -29,15 +29,25 @@
**Syntax**
This tool allows to compute an expression for every row of a query and add result as a new column (field)
This tool allows to compute an expression for every row of a query and add result as a new column (field).
Columns are referenced with **c** and a **number**. For example, **c1** refers to the first column of a tab-delimited file
- Columns are referenced with **c** and a **number**. For example, **c1** refers to the first column of a tab-delimited file
- **c3-c2** will add a length column to the query if **c2** and **c3** are start and end position
-----
**Example**
- **c3-c2** will add a length column to the query if **c2** and **c3** are start and end position
- Input file::
chr1 151077881 151077918 2 200 -
chr1 151081985 151082078 3 500 +
- Compute "c4*c5" of the above file. The result is::
chr1 151077881 151077918 2 200 - 400.0
chr1 151081985 151082078 3 500 + 1500.0
</help>
</tool>
</tool>