R-alpha: Problem with gc()

On Thu, 26 Jun 1997 15:34:59 +0100 (NFT),
Heiner Schwarte wrote:

Could someone plese confirm the following ?
(AIX 4.1.4, 0.49+patch1+patch2a)

################################################################

schwarte@cauchy:[/home/schwarte]>/usr/local/R-0.49/bin/R

R : Copyright 1997, Robert Gentleman and Ross Ihaka
Version 0.49 Beta (April 23, 1997)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type "license()" for details.

logical(10)

 [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE

gc()

Garbage collection ...
149210 cons cells free (74%)
1820k bytes of heap free (93%)

logical(10)

 [1]  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE

logical(10)

 [1]  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE

#################################################################

The same on a PC with Linux/Debian-1.3:


R : Copyright 1997, Robert Gentleman and Ross Ihaka
Version 0.49 Beta (April 23, 1997)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type "license()" for details.

R> logical(10)
 [1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE
R>  gc()
Garbage collection ...
142276 cons cells free (71%)
3945k bytes of heap free (96%)
R>  logical(10)
 [1]  TRUE  TRUE  TRUE FALSE FALSE  TRUE  TRUE FALSE  TRUE FALSE
R>  logical(10)
 [1]  TRUE  TRUE  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE
R> 
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Same on SunOS 4.1.4.

logical(10)

[1] FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE

gc()

Garbage collection ...
149941 cons cells free (74%)
1821k bytes of heap free (93%)

logical(10)

[1]  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE

Ben

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Yesterday I posted a problem with logical() after a gc().

This problem occurs because do_makevector() in the file
builtin.c does not properly initialize the memory if a 
vector of logicals is manufactured. Simply adding an 
initialization  loop solves the problem. ( Following 
line 333 one finds  the initialization for INTSXP and 
REALSXP. Add one for LGLSXP.)

Heiner

  

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