[R] Discrepancy in help for object.size() and question on how to round object sizes

[Jennifer Lyon]

I think there is a discrepancy In the help for object.size().

In the usage section there is the comment:
## S3 method for class 'object_size':

while in the value section there is the text:
 An object of class ‘"object.size"’ ...

And R itself says:

 > class(object.size(letters))
[1] "object_size"

Also, I was trying to print out object sizes in Kb, but rounded to
whole number of units, but I could not
figure out how to do that without having to replicate the math in the
print method for object.size.

> tmp<-numeric(100000)
> object.size(tmp)
800024 bytes

> print(object.size(tmp), units="Kb")
781.3 Kb

What I want is 781 Kb, but it wasn't obvious how to get there. The
following seemed wrong, and
didn't work:

> print(signif(object.size(tmp),1), units="Kb")
781.2 Kb
> print(round(object.size(tmp)), units="Kb")
781.3 Kb

I know I can just get the result in bytes and divide by 1024, and then
round, but it seemed like there
should be a more straightforward way, so any suggestions are welcome.

Thanks!

Jen

> sessionInfo()
R version 2.11.1 (2010-05-31)
i686-pc-linux-gnu

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
 [5] LC_MONETARY=C              LC_MESSAGES=en_US.UTF-8
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C
 [9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

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

other attached packages:
[1] RColorBrewer_1.0-2

loaded via a namespace (and not attached):
[1] tools_2.11.1