On Feb 10, 2010, at 9:21 PM, bluesky...@gmail.com wrote:
On Wed, Feb 10, 2010 at 7:05 PM, David Winsemius <dwinsem...@comcast.net
> wrote:
On Feb 10, 2010, at 7:54 PM, David Winsemius wrote:
On Feb 10, 2010, at 7:47 PM, bluesky...@gmail.com wrote:
On Wed, Feb 10, 2010 at 6:40 PM, David Winsemius <dwinsem...@comcast.net
>
wrote:
On Feb 10, 2010, at 6:34 PM, bluesky...@gmail.com wrote:
S Programming by Venables and Ripley (2000) says on page 8, "R
objects
have another way to give information using the function
\tttext{typeof}, which often gives the same information as
\tttext{storage.mode}." It implies that there are some
differences
between typeof and storage.mode.
However, according to ?typeof and ?storage.mode, it doesn't
seem to be
so. Could somebody let me know if there is any difference? If
there
is, what the difference is?
Dear Peng Yu;
There is a difference.
Would you please give me an example when they will be different?
It took me about 20 seconds to find an example where they were
different
using typical objects in my workspace. You have been at this for
about a
year now. I think you are taking the easy route out, rather than
working
some of these answers out by yourself.
Furthermore the answer is readily available from the obvious help
pages,
which you have been repeatedly directed to.
I just realized that I meant to ask the difference between data.class
and class, rather than typeof and storage.mode, as I have tried the
example from ?data.class. And I get no differences between data.class
and class. Would you please let me know the difference between them if
there is any? Sorry for the confusion.
x=LETTERS
data.class(factor(x)) # has a class attribute
[1] "factor"
class(factor(x)) # has a class attribute
[1] "factor"
data.class(matrix(x, ncol = 13)) # has a dim attribute
[1] "matrix"
class(matrix(x, ncol = 13)) # has a dim attribute
[1] "matrix"
data.class(list(x)) # the same as mode(x)
[1] "list"
class(list(x)) # the same as mode(x)
[1] "list"
data.class(x) # the same as mode(x)
[1] "character"
class(x) # the same as mode(x)
[1] "character"
Yet another question which the help page answers.
David Winsemius, MD
Heritage Laboratories
West Hartford, CT
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