Dear list members,
My question concerns the use of system() in R version 3.1.1 patched and
MacosX 10.9.4.
I want capture the result of a system command without displaying error
message. I give exemple.
In terminal, if I do this command:
find $HOME -type f -name 'PuertoSanJose.csv'
I get the correct answer but also a message about Permission denied for
one directory:
/Users/marc/Dropbox/DropBoxPerso/Data_Ale/Original/PuertoSanJose.csv
find: /Users/marc/Library/Saved Application
State/com.adobe.flashplayer.installmanager.savedState/data.data:
Permission denied
I want get the output of this command in R; then I do:
> pathfile <- system("find $HOME -type f -name 'PuertoSanJose.csv'",
intern=TRUE, ignore.stderr = TRUE)
Message d'avis :
l'exécution de la commande 'find $HOME -type f -name 'PuertoSanJose.csv'
2>/dev/null' renvoie un statut 1
In pathfile, I have the correct answer but I have also a message that I
don't want.
My question is then: How to prevent display this message?
I try the following:
> pathfile <- capture.output(system("find $HOME -type f -name
'PuertoSanJose.csv'", intern=TRUE, ignore.stderr = TRUE))
Message d'avis :
l'exécution de la commande 'find $HOME -type f -name 'PuertoSanJose.csv'
2>/dev/null' renvoie un statut 1
The same
I try also:
> pathfile <- suppressMessages(system("find $HOME -type f -name
'PuertoSanJose.csv'", intern=TRUE, ignore.stderr = TRUE))
Message d'avis :
l'exécution de la commande 'find $HOME -type f -name 'PuertoSanJose.csv'
2>/dev/null' renvoie un statut 1
The same
The only solution to not see this message is:
> pathfile <- system("find $HOME -type f -name 'PuertoSanJose.csv'",
intern=FALSE, ignore.stderr = TRUE)
/Users/marc/Dropbox/DropBoxPerso/Data_Ale/Original/PuertoSanJose.csv
> pathfile
[1] 1
But pathfile does not capture the output.
And the use of capture.output() does not help:
> pathfile <- capture.output(system("find $HOME -type f -name
'PuertoSanJose.csv'", intern=FALSE, ignore.stderr = TRUE))
/Users/marc/Dropbox/DropBoxPerso/Data_Ale/Original/PuertoSanJose.csv
> pathfile
character(0)
I really don't know how to not see this message...
If someone knows, I will appreciate !
Marc
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