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You can create expressions (formulas) directly in the dashboard components. It can thus display calculated values that are not present in the data source datasource file/spreadsheet.
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Expressions support the backslash as [[EscapeChar|escape character]] so that names can contain the delimiting characters.
== Basic structure of a Expression (Formula) == <!--T:77-->
==== Identifier ====<!--T:226-->
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It is the name of the field or column involved in the expression, it must be delimited by double quotes.
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* Examples: "Average Price". "Screw 1\" philips", "Seler"
'''BETWEEN("Date Issued"; '01/01/2019'; '31/12/2019')''' - Returns true if ''Date Issued'' is between ''01/01/2019'' and ''12/31/2019''. Otherwise returns false
==== COUNT function ==== <!--T:229-->
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Returns number of occurrences (lines) for column or value.
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By now this functions works only at Datasource expressions
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Syntax:
COUNT(<expression>)
Example:
'''COUNT("Product")''' - Returns number of occurrences (lines) of products
==== COUNT_DISTINCT function ==== <!--T:233-->
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Returns number of unique occurrences (lines) for column or value.
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By now this functions works only at Datasource expressions
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Syntax:
COUNT_DISTINCT(<expression>)
Example:
'''COUNT_DISTINCT("Product")''' - Returns number of unique (different) occurrences (lines) of products
==== IF ELSE function (If .... Otherwise ...) ==== <!--T:153-->
* '''"@avg[column]"''' - Average column, similar to ''"@sum[column]"'' / ''"@count"''
* '''"@prev[column]"''' - Row value before current row for this column
* '''"@totalRowValue[column]"''' - Value of total row, (if present), from this column.
* '''"@accumCol[column]"''' - Cumulative value from column to current row. Useful for calculating variable mean.
** Example: ''"@accumCol[column]"'' / ''"@row"''
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