Question

I would like to avoid having to manually change the dates in the title of a Spotfire dashboard every week. The goal is to get every Sunday's date in short format: so in the case of this week, the title would read "As of 1/14/2018". I tried to link the expression in the title to the below R script to no avail:

d <-  as.Date( Sys.Date() ) 
prev.days <- seq( d - 6, d ,by = 'day' )

Sunday <- prev.days[weekdays(prev.days) =='Sunday']

The chunk of code above is linked to a Document Property called Sundays. When I try to insert the document property in the title as such 'As of ${Sundays}', Spotfire detects a conversion issue:

"Error in FUN(X[[i]]) : inherits(funValue, "POSIXct") is not TRUE'.

I also tried forcing a conversion by using as.POSIXct() in the script to no avail. I would like to avoid using R packages like lubridate as they seem buggy when used in tandem with Spotfire.

Finally, if you know a way to bypass R and write a code in Spotfire's native language that would be even better.

Answer 1

尝试使用一个小编辑（添加为.POSIXct）

尝试使用您的脚本

d <-  as.Date( Sys.Date() ) 
prev.days <- seq( d - 6, d ,by = 'day' )

Sunday <- as.POSIXct(prev.days[weekdays(prev.days) =='Sunday'])

我将Sunday设置为DocumentProperty的输出参数，然后将DocumentProperty添加到标题栏。全部按预期显示，例如＆＃34; 01/21/2018 07：00：00＆＃34;以DateTime格式。据我了解，TERR将始终以类型DateTime格式发送结果。

如果没有as.POSIXct转换，TERR会将值作为Real传递给Spotfire。

转到此处了解有关TERR和日期时间的更多详细信息：https://support.tibco.com/s/article/What-TERR-object-class-does-the-Spotfire-data-function-framework-recognize-as-date-time-information?_ga=2.117439810.555218220.1516612347-1562366391.1506414681

How to dynamically update dates in SpotfireTitles

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