[datatable-help] eval(eval issue
Matthew Dowle
mdowle at mdowle.plus.com
Sun Aug 14 11:48:46 CEST 2011
Not sure why there's an extra level of quote() inside the string it's
parsing; i.e., instead of :
ListExpr <- parse(text=paste("quote(as.list(c(",
paste(unlist(tmp.sgp.summaries), collapse=", "),")))",sep=""))
ByExpr <- parse(text=paste("quote(list(", paste(sgp.groups.to.summarize,
collapse=", "), "))", sep=""))
tmp <- tmp.dt[, eval(eval(ListExpr)), by=eval(eval(ByExpr))]
try removing the quote() as follows (also changing the as.list to list
to make a considerable speed improvement as per wiki example 4) :
ListExpr <- parse(text=paste("list(", paste(unlist(tmp.sgp.summaries),
collapse=", "),")",sep=""))
ByExpr <- parse(text=paste("list(", paste(sgp.groups.to.summarize,
collapse=", "), "))", sep="")
tmp <- tmp.dt[, eval(ListExpr), by=eval(ByExpr)]
If that doesn't fix it then we'll need a reproducible example please
that we can paste into R. Should be possible to create one in this case
as it's a type error. Also a confirm that you're using v.1.6.4 and which
version of R please as this kind of error can be affected by that.
Matthew
On Sat, 2011-08-13 at 20:49 -0500, Damian Betebenner wrote:
> As an update. The issue that seems to be throwing the error is the
> call to a function “percent_in_category” that has single quoted
> expressions in the ListExpr:
>
>
>
> Browse[1]> ListExpr
>
> expression(quote(as.list(c(median_na(SGP), median_na(SGP_TARGET),
> percent_in_category(CATCH_UP_KEEP_UP_STATUS, list(c('Catch Up: Yes',
> 'Keep Up: Yes')), list(c('Catch Up: Yes', 'Catch Up: No', 'Keep Up:
> Yes', 'Keep Up: No'))), num_non_missing(SGP),
> percent_in_category(ACHIEVEMENT_LEVEL, list(c('Proficient',
> 'Advanced')), list(c('Unsatisfactory', 'Partially Proficient',
> 'Proficient', 'Advanced'))), num_non_missing(ACHIEVEMENT_LEVEL),
> percent_in_category(ACHIEVEMENT_LEVEL_PRIOR, list(c('Proficient',
> 'Advanced')), list(c('Unsatisfactory', 'Partially Proficient',
> 'Proficient', 'Advanced'))),
> num_non_missing(ACHIEVEMENT_LEVEL_PRIOR)))))
>
>
>
> When I isolate in my testing, it gives the same error:
>
>
>
> Error during wrapup: invalid 'type' (character) of argument
>
>
>
>
>
> Anybody know of a workaround for this or a simplification of the
> approach I’m taking.
>
>
>
> thanks,
>
>
>
> Damian
>
>
>
>
>
>
>
> Damian Betebenner
>
> Center for Assessment
>
> PO Box 351
>
> Dover, NH 03821-0351
>
>
>
> Phone (office): (603) 516-7900
>
> Phone (cell): (857) 234-2474
>
> Fax: (603) 516-7910
>
>
>
> dbetebenner at nciea.org
>
> www.nciea.org
>
>
>
>
>
>
>
>
> From: Damian Betebenner
> Sent: Saturday, August 13, 2011 9:05 PM
> To: 'datatable-help at lists.r-forge.r-project.org'
> Subject: eval(eval issue
>
>
>
>
> All,
>
>
>
> A line of code that used to work version 1.6.2 is now throwing an
> error so I thought I’d see if anyone knows exactly what is going on.
> The error that I now get is:
>
>
>
> Error during wrapup: invalid 'type' (character) of argument
>
>
>
> The call that is generating the error is:
>
>
>
> tmp <- tmp.dt[, eval(eval(ListExpr)), by=eval(eval(ByExpr))]
>
>
>
>
>
> It is essentially a
>
>
>
> x[,j=ListExpr,by=ByExpr] call but the j is a long of custom functions
> and the ByExpr is a list of variables in x that changes via a loop.
>
>
>
> Currently (what is broken), the ListExpr and ByExpr are created using
> the following:
>
>
>
> ListExpr <- parse(text=paste("quote(as.list(c(",
> paste(unlist(tmp.sgp.summaries), collapse=", "),")))",sep=""))
>
> ByExpr <- parse(text=paste("quote(list(",
> paste(sgp.groups.to.summarize, collapse=", "), "))", sep=""))
>
>
>
> For example, ListExpr is:
>
>
>
> Browse[1]> ListExpr
>
> expression(quote(as.list(c(median_na(SGP), median_na(SGP_TARGET),
> percent_in_category(CATCH_UP_KEEP_UP_STATUS, list(c('Catch Up: Yes',
> 'Keep Up: Yes')), list(c('Catch Up: Yes', 'Catch Up: No', 'Keep Up:
> Yes', 'Keep Up: No'))), num_non_missing(SGP),
> percent_in_category(ACHIEVEMENT_LEVEL, list(c('Proficient',
> 'Advanced')), list(c('Unsatisfactory', 'Partially Proficient',
> 'Proficient', 'Advanced'))), num_non_missing(ACHIEVEMENT_LEVEL),
> percent_in_category(ACHIEVEMENT_LEVEL_PRIOR, list(c('Proficient',
> 'Advanced')), list(c('Unsatisfactory', 'Partially Proficient',
> 'Proficient', 'Advanced'))),
> num_non_missing(ACHIEVEMENT_LEVEL_PRIOR)))))
>
>
>
>
>
> And ByExpr is:
>
>
>
> Browse[1]> ByExpr
>
> expression(quote(list(STATE, CONTENT_AREA, YEAR, GRADE,
> STATE_ENROLLMENT_STATUS, CATCH_UP_KEEP_UP_STATUS_INITIAL)))
>
>
>
>
>
> I’m sure this can be simplified.
>
>
>
> Any help greatly appreciated,
>
>
>
> Damian
>
>
>
>
>
>
>
>
>
> Damian Betebenner
>
> Center for Assessment
>
> PO Box 351
>
> Dover, NH 03821-0351
>
>
>
> Phone (office): (603) 516-7900
>
> Phone (cell): (857) 234-2474
>
> Fax: (603) 516-7910
>
>
>
> dbetebenner at nciea.org
>
> www.nciea.org
>
>
>
>
>
>
>
>
> _______________________________________________
> datatable-help mailing list
> datatable-help at lists.r-forge.r-project.org
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
More information about the datatable-help
mailing list