Dear Guylaine,
this has nothing to do with either 'plm' or logs. The error message says it
all: "fin d'entrée inattendu(e)". Somehow, you're inputting '+' twice in the R
console, so the formula is syntactically invalid. Moreover, you assign the
forula through '<' instead of '<-' so that this becomes a logical operation
instead of an assignment.
May I suggest you break up the task to avoid confusion: first make a formula,
like 'fm <- y ~ x1 + x2', check that it be a valid 'formula' object, then use
it in 'plm(fm, data=mydata)' etc..
It is also best to use spacings, indentation, etc. to avoid messing things up.
Best Wishes,
Giovanni
######### original message ##########
------------------------------
Message: 42
Date: Sun, 16 Jun 2013 09:05:30 +0200
From: "Guylaine NOUWOUE" <guylaina...@yahoo.fr>
To: <r-help@r-project.org>
Subject: [R] Problems using log() in a plm() regression.
Message-ID: <000001ce6a5f$e5b47790$b11d66b0$@fr>
Content-Type: text/plain
Hello,
I am performing a panel model and I have an error. In fact, I would like to
set up the pooling model and I have an error message. Any help
>pool<plm(panel$lexportijt~ldistit+lpopit+lpopjt+lpibit+lpibjt+lpibcit+lpibc
jt+langueij+histoireij+infrasij+frontiereij+simijt+enclaviit,data=panel,inde
x=c("origine","annee"))
Erreur dans parse(text = x) :
fin d'entrée inattendu(e) dans "panel$lexportijt ~ ldistit + lpopit +
lpopjt + lpibit + lpibjt + lpibcit + lpibcjt + langueij + histoireij +
infrasij + frontiereij + simijt + enclaviit + + "
Thanks in advance
Guylaina
########### end original message ########
Ai sensi del D.Lgs. 196/2003 si precisa che le informazi...{{dropped:12}}
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