[R] difference in sort order linux/Windows (R.2.11.0)

[carslaw]

Dear R users,

I'm a bit perplexed with the effect sort has here, as it is different on
Windows vs. linux. 
It makes my factor levels and subsequent plots different on the two systems.

Given:

types <- c("PC-D-Euro-0", "PC-D-Euro-1", "PC-D-Euro-2", "PC-D-Euro-3", 
"PC-D-Euro-4", "PC-D-Euro-5", "PC-D-Euro-6", "LCV-D-Euro-0", 
"LCV-D-Euro-1", "LCV-D-Euro-2", "LCV-D-Euro-3", "LCV-D-Euro-4", 
"LCV-D-Euro-5", "LCV-D-Euro-6", "HGV-D-Euro-0", "HGV-D-Euro-I", 
"HGV-D-Euro-II", "HGV-D-Euro-III", "HGV-D-Euro-IV EGR", "HGV-D-Euro-IV SCR", 
"HGV-D-Euro-IV SCRb", "HGV-D-Euro-V EGR", "HGV-D-Euro-V SCR", 
"HGV-D-Euro-V SCRb", "HGV-D-Euro-VI", "HGV-D-Euro-VIb")

On linux, sort does:

sort(types)
 [1] "HGV-D-Euro-0"       "HGV-D-Euro-I"       "HGV-D-Euro-II"     
 [4] "HGV-D-Euro-III"     "HGV-D-Euro-IV EGR"  "HGV-D-Euro-IV SCR" 
 [7] "HGV-D-Euro-IV SCRb" "HGV-D-Euro-V EGR"   "HGV-D-Euro-VI"     
[10] "HGV-D-Euro-VIb"     "HGV-D-Euro-V SCR"   "HGV-D-Euro-V SCRb" 
[13] "LCV-D-Euro-0"       "LCV-D-Euro-1"       "LCV-D-Euro-2"      
[16] "LCV-D-Euro-3"       "LCV-D-Euro-4"       "LCV-D-Euro-5"      
[19] "LCV-D-Euro-6"       "PC-D-Euro-0"        "PC-D-Euro-1"       
[22] "PC-D-Euro-2"        "PC-D-Euro-3"        "PC-D-Euro-4"       
[25] "PC-D-Euro-5"        "PC-D-Euro-6"


And on Windows:

sort(types)

 [1] "HGV-D-Euro-0"       "HGV-D-Euro-I"       "HGV-D-Euro-II"    
 [4] "HGV-D-Euro-III"     "HGV-D-Euro-IV EGR"  "HGV-D-Euro-IV SCR"
 [7] "HGV-D-Euro-IV SCRb" "HGV-D-Euro-V EGR"   "HGV-D-Euro-V SCR" 
[10] "HGV-D-Euro-V SCRb"  "HGV-D-Euro-VI"      "HGV-D-Euro-VIb"   
[13] "LCV-D-Euro-0"       "LCV-D-Euro-1"       "LCV-D-Euro-2"     
[16] "LCV-D-Euro-3"       "LCV-D-Euro-4"       "LCV-D-Euro-5"     
[19] "LCV-D-Euro-6"       "PC-D-Euro-0"        "PC-D-Euro-1"      
[22] "PC-D-Euro-2"        "PC-D-Euro-3"        "PC-D-Euro-4"      
[25] "PC-D-Euro-5"        "PC-D-Euro-6"      

Session info for both systems is below.  The order I actually want is the
Windows one, but looking at it,
 the linux order is perhaps more intuitive.  However, the problem is the
order is inconsistent between
 the two systems.  Any suggestions?

sessionInfo()
R version 2.11.0 (2010-04-22) 
x86_64-pc-linux-gnu 

locale:
 [1] LC_CTYPE=en_GB.utf8          LC_NUMERIC=C                
 [3] LC_TIME=en_GB.utf8           LC_COLLATE=en_GB.utf8       
 [5] LC_MONETARY=en_GB.utf8       LC_MESSAGES=en_GB.utf8      
 [7] LC_PAPER=en_GB.utf8          LC_NAME=en_GB.utf8          
 [9] LC_ADDRESS=en_GB.utf8        LC_TELEPHONE=en_GB.utf8     
[11] LC_MEASUREMENT=en_GB.utf8    LC_IDENTIFICATION=en_GB.utf8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] rkward_0.5.3

loaded via a namespace (and not attached):
[1] tools_2.11.0

> sessionInfo()
R version 2.11.0 (2010-04-22)
x86_64-pc-mingw32

locale:
[1] LC_COLLATE=English_United Kingdom.1252
[2] LC_CTYPE=English_United Kingdom.1252  
[3] LC_MONETARY=English_United Kingdom.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United Kingdom.1252   

 
attached base packages:

[1] stats     graphics  grDevices utils     datasets  methods   base

Dr David Carslaw
King's College London
Environmental Research Group
Franklin Wilkins Building
150 Stamford Street
London
SE1 9NH 
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