problem in finding sizes of objects using a for loop

Hi,
?You can also use lapply() or sapply() without the get() function.

?list1<-list(x=x,y=y)
?sapply(list1,object.size)
#??? x???? y 
#80040?? 840 
?do.call(rbind,lapply(list1,object.size))
? # [,1]
#x 80040
#y?? 840

A.K.







----- Original Message -----
From: Jorge I Velez <jorgeivanvelez at gmail.com>
To: Purna chander <chanderbio at gmail.com>
Cc: r-help <r-help at r-project.org>
Sent: Thursday, October 25, 2012 2:40 AM
Subject: Re: [R] problem in finding sizes of objects using a for loop

Dear Purna,

You need the get() function around object[i] in order to accomplish the
same results:

# data
x<-rnorm(10000)
y<-runif(100,min=40,max=1000)

# sizes
objects<-ls()
for (i in seq_along(objects)){
?  print(c(objects[i],object.size(get(objects[i]))))? # get() is added here
}
[1] "x"? ?  "80040"
[1] "y"?  "840"

get() is needed because each element of "objects" is a character and the
object.size() function does not operates on characters, but on objects (not
your variable, the definition in R).? See ?get and ?object.size for more
information.

HTH,
Jorge.-

Dear All,

I wanted to extract the sizes of all created objects. For E.g when I
created 2 objects(x and y), I got their sizes using the following
code:

x<-rnorm(10000)
y<-runif(100,min=40,max=1000)
ls()

[1] "x" "y"

object.size(x)

80024 bytes

object.size(y)

824 bytes

However, I was unable to get their sizes when I used a for loop in the
following way:

objects<-ls()
for (i in seq_along(objects)){

+?  print(c(objects[i],object.size(objects[i])))
+
+ }
[1] "x"? "64"
[1] "y"? "64"


The result obtained by me is wrong in second case.

I understood that variables x and y are treated as characters. But to
rectify this problem.

Regards,
Purna

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______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.