TERRAggregation_DateTime
In the Spotfire
Custom Expressions dialog box, you can select the pre-defined expression
TERRAggregation_DateTime
from the
Function list. This expression function sets the variable
output
to a scalar value of the TERR data type
POSIXct
or
POSIXlt
, which Spotfire converts to the corresponding Spotfire data type DateTime.
The TERR script is called once for each group of data to be aggregated. No special handling for aggregation is necessary in your TERR script.
Argument | Argument description |
---|---|
A TERR script. | The TERR script contains the following.
|
Spotfire column names. | Passed as additional arguments, these are the data column names that
input1 to
inputN represent. All columns must be the same length.
|
Returned by TERR | Converted in Spotfire |
---|---|
A single aggregated value of data type
POSIXct or
POSIXlt with the time zone as UTC. Any data specified as NA in
TERR maps to null in
Spotfire.
Do not use the
|
A single aggregated value of data type DateTime. |
TERRAggregation_DateTime
TERRAggregation_DateTime("output <-max(input1, 'mins')", [X])
max
, and Spotfire contains the function
Max
. ) You must overwrite this autocorrection manually to ensure that you use the TERR function case and name in your expression function.
See Embedding the contents of a script in an expression function for a detailed procedure for creating an expression function.