[R] use of names() within lapply()

[arun]

Hi,
Try:
set.seed(25)
g<- list(sample(1:40,20,replace=TRUE),sample(40:60,20,replace=TRUE))
names(g)<- c("2009-10-07","2012-02-29")
pdf("Trialnew.pdf")
 lapply(seq_along(g),function(i) plot(g[[i]],main=names(g)[i]))
dev.off()
A.K.




----- Original Message -----
From: Ivan Alves <pap:
ucho at me.com>
To: "R-help at r-project.org" <R-help at r-project.org>
Cc: 
Sent: Wednesday, April 17, 2013 11:04 AM
Subject: [R] use of names() within lapply()

Dear all,

List g has 2 elements

> names(g)
[1] "2009-10-07" "2012-02-29"

and the list plot

lapply(g, plot, main=names(g))

results in equal plot titles with both list names, whereas distinct titles names(g[1]) and names(g[2]) are sought. Clearly, lapply is passing 'g' in stead of consecutively passing g[1] and then g[2] to process the additional 'main'  argument to plot.  help(lapply) is mute as to what to element-wise pass parameters.  Any suggestion would be appreciated.

Kind regards,
Ivan
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