Differences

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--- transformations:replacecolumn [2015/01/29 23:06] – created dmitry
+++ transformations:replacecolumn [2021/04/01 14:57] – craigt
@@ Line 1: / Line 1: @@
-===== Calculate and replace column(s) =====
+{{ transformations:ReplaceColumnsAction.png}}
+====== MODIFY COLUMN(S) ======
+Category: Transform / Basic\\
-This transformation calculates and replaces one or more existing columns using [[syntax:start|expression(s)]]. One expression replaces one column.
+\\
+=====Description=====
+This action calculates and replaces one or more existing columns using [[syntax:start|expression(s)]]. One expression replaces one column.
-Please note, that in expressions you can refer to the same column. In this case previous (old) value from this column will be used.
+Please note that you can refer to the same column in expressions. In this case, the original value from this column will be used.\\
-See also
+\\
+=====Action settings=====
+^Setting^Description^
+|Column to replace|Select the name of the column to replace.|
+|Expression or Value|Options:  //It's an expression// or //It's a text or number//.  Enter the expression used to calculate the updated\\ column values, or, enter the text or numeric value that will be repeated for all values.|
+Click //Replace more columns// to modify additional columns within this same action.\\
+\\
+=====Examples=====
+**Objective:** Calculate the $ amount of compulsory deductions for each country and include the result in the table instead of the deductions in %.
+**Source table:** Average income and deductions
+^Country  ^Gross income   ^Disposable income  ^Compulsory deductions  ^
+| United States  |  56067|  45582|  18.7%|
+| Australia  |  51050|  42617|  16.52%|
+| Switzerland  |  53716|  48414|  9.87%|
+| Canada  |  45896|  37469|  18.36%|
+**Action parameters:**
+>Column to replace: Compulsory deductions
+>Expression: ([Gross income] - [Disposable income])
+**Output table:**
+^Country  ^Gross income   ^Disposable income  ^Compulsory deductions  ^
+| United States  |  56067|  45582|  10485|
+| Australia  |  51050|  42617|   8433|
+| Switzerland  |  53716|  48414|  5302|
+| Canada  |  45896|  37469|   8427|
+\\
+=====Shortcuts=====
+Fast ways to create the action:\\
+  *Right-click on a column heading, and select "Modify", then "With expression..." from the submenu.
+  *Click the drop-down arrow in a column heading and select "Modify", then "With expression..." from the submenu.
+\\
+=====See also=====
   * [[transformations:addcolumn|Calculate new column(s)]]