Methods' Details |
addChartDataChangeEventListener
- Description
- allows a component supporting the
XChartDataChangeEventListener interface to
register as listener. The component will be notified with a
ChartDataChangeEvent every time the chart's data
changes.
- Parameter aListener
- the component that is to be added as listener
- See also
- XChartDataChangeEventListener, ChartDataChangeEvent
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removeChartDataChangeEventListener
- Description
- removes a previously registered listener.
- Parameter aListener
- the component that is to be removed
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getNotANumber
- Returns
- the value which is to be used as an indicator for a
missing value in the data.
In IEEE arithmetic format it is one of the NaN values, so
there are no conflicts with existing numeric values.
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isNotANumber
boolean |
isNotANumber( |
[in] double |
nNumber ); |
- Description
- checks whether the value given is equal to the indicator value
for a missing value.
In IEEE arithmetic format it is one of the NaN values, so
there are no conflicts with existing numeric values.
Always use this method to check, if a value is not a
number. If you compare the value returned by
XChartData::getNotANumber() to another double
value using the = operator, you may not get the desired
result!
- Returns
- `TRUE` if the number given is interpreted by the chart as
a missing value.
- Parameter nNumber
- the number that you want to check for validity.
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