stringsAsFactors in the transparency layer
I have a simple table with two columns as describer below:
create table T as
Select 1 GR, 'xx' XX dual union all
Select 1 GR, "yy" double XX;
Summary execution by transparent layer works very well, note by default for column varchar2 XX stringsAsFactors management.
> summary (T)
XX GR
Min. : xx:1 1
1 Qu.:1 yy:1
Median: 1
Average: 1
3rd Qu.:1
Max. : 1
Although if I treat the data using groupApply, I get the same result, but the XX column is interepreted as character (no conversion factor implied is made).
> (ore.groupApply)
+ X = T,
+ INDEX = T.$ GR.
+ {function
+ summary (x)
+ }
+ )
$1"
XX GR
Min. : 1:2 time
Qu.:1 of 1st class: character
Median: Mode 1: character
Average: 1
3rd Qu.:1
Max. : 1
How can be the default behavior summary established?
ORE_1.4.1, R version 3.0.2 Windows 64-bit
Thank you
Jaromir
The following change to your example converts the XX variable to factor. Although the defined ore.frame factors, when they are charged to the user-defined function factors appear as vectors of character.
R > (ore.groupApply)
+ X = T,
+ INDEX = T.$ GR.
+ {function
+ x$ XX<->->
+ summary (x)
+ })
$1"
XX GR
Min. : xx:1 1
1 Qu.:1 yy:1
Median: 1
Average: 1
3rd Qu.:1
Max. : 1
Best regards
Sherry
Tags: Business Intelligence
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