QlikView Reference Manual.pdf - QlikCommunity - QlikView

73 Calculated Formulas
In the property dialogs of the QlikView sheets and sheet objects, there are a number of properties allowing
fixed text labels or fixed numbers. These are typically used as labels, window titles, chart titles and in some
cases as fixed numeric limits.
For many of the property entries mentioned above, it is possible to enter a calculated expression rather than a
constant text or number. This feature is called calculated formula. Wherever a calculated formula can be
used, this is indicated on the relevant place in this manual.
73.1 Entering a Calculated Formula
Calculated formulas are entered according to the following syntax:
= expression
For the syntax of allowed expressions, see the section below.
The equal sign in the first position of the entry indicates that the remainder should be interpreted as an
expression. QlikView will try to evaluate the expression. If this is not possible, e.g. because of incorrect syntax,
the entire label including the equal sign will be displayed.
Calculated formulas can also be generated in the Edit Expression dialog which opens when clicking on the
... button beside the edit box (see further Edit Expression Dialog (page 737)).
73.2 Error Messages
If a calculated formula cannot be correctly evaluated by QlikView, the formula itself will be returned, followed
by two slashes and an error message.
Example:
= mode(x) //out of object memory
Each calculated formula requires a certain amount of memory. In order not to use excessive memory, a limit
on the allowed memory allocation for each calculated label has been put in to the program. If you enter a
too complex expression, QlikView will return the expression followed by the error message “// out of object
memory”.
73.3 Calculated Formula
The syntax for expression in calculated labels is virtually the same as for Chart Expressions (page 765),
with a few exceptions:
l With no dimensions to iterate over, the Chart Aggregation functions (page 770) will essentially behave as if used in
chart expressions with the total qualifier in front of all field names. The total qualifier is thus optional and has no special
meaning in calculated formulas. The set definitions work just as in chart expressions, i.e. they cause aggregations
over a selection different than the current one.
l In a calculated formula, field names may optionally be used without an enclosing aggregation function. In this case only
will be used as an aggregation function.
Example:
is equal to
= Currency
= only(Currency)
851