R-alpha: [logical, drop = FALSE] -- my silliness ..

[Martin Maechler]

I must have been a bit tired or screwed up otherwise:
As Thomas guessed, I've forgotten the extra ","  which is needed for drop=..

ma[logi, , drop = FALSE]	works all right.
        ^^^
	do not forget this !

 MM> Look at this :
 MM> 
 MM> ma <- cbind(1,1:8); logi <- rep(c(T,F),4)
 MM> ma[logi,]
 MM> ##>      [,1] [,2]
 MM> ##> [1,]    1    1
 MM> ##> [2,]    1    3
 MM> ##> [3,]    1    5
 MM> ##> [4,]    1    7
 MM> 
 MM> ##-- now the same with  [ , drop = FALSE]
 MM> 
 MM> ## R (-0.50-a3) :
 MM> 
 MM> 	 ma[logi, drop = F]
 MM> ##>> Error: invalid subscript type
 MM> ## Splus-3.4:
 MM> 	 ma[logi, drop = F]
 MM> ##>> [1] 1 1 1 1 1 3 5 7
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