Displaying 20 results from an estimated 20000 matches similar to: "Space required by object?"
2007 Apr 24
4
Size of an object in workspace
Hi folks,
Is there a function to show the size of an R object? eg. in Kbytes?
Couple months ago Bendix Carstensen posted this marvelous little function lls(), which shows all objects in the current workspace by mode, class and 'size'. This is a wonderful enhancement to the build-in ls() already and I now have it sourced in my Rprofile.site at startup.
The only drawback is,
2006 Dec 14
5
Better way to change the name of a column in a dataframe?
Hello R users --
If I have a dataframe such as the following, named "frame" with the
columns intended to be named col1 through col6,
> frame
col1 col2 cmlo3 col4 col5 col6
[1,] 3 10 2 6 5 7
[2,] 6 8 4 10 7 1
[3,] 7 5 1 3 1 8
[4,] 10 6 5 4 9 2
and I want to correct or otherwise change the
2006 Jan 05
2
Splitting the list
I've changed the heading because this really is another thread. I
think it inevitable that there will, in the course of time, be other
lists that are devoted, in some shape or form, to the concerns of
practitioners (at all levels) who are using R. One development I'd
not like to see is fracture along application area lines, allowing
those who are comfortable in coteries whose
2008 Jun 20
2
The Green Book and its relevance to R
I bogged down about half way through reading the Green Book, in part
because it became increasingly difficult to understand how some of the
ideas related to R, as opposed to S (which I have not used). Does any
reader know whether there is a document that points out differences
between S and R that would be helpful in reading the Green Book?
Ideally, perhaps, I need a "crib sheet" to
2008 Jan 30
1
"hist" combines two lowest categories -- is there a workaround?
When preparing a series of histograms I found that hist was combining
the two lowest categories or bins, 1 and 2. Specifying breaks, as
illustrated below, resulted in the correct histogram:
values <- sample(10,500,replace=TRUE)
hist(values)
hist(values,breaks = 0:10)
Apparently, the number of values strictly less than 1 is shown in the
first bin (and since none is less than 1,
2005 Jun 28
1
Using data frames for EDA: Insert, Change name, delete columns? (Newcomer's question)
I am finding complex analyses easier than some elementary operations in
R. In particular I want to do some low level exploratory data analyses
with data in a data frame but cannot find commands to easily insert,
remove (delete), rename, and re-order (arbitrarily, not sort) columns.
I see that the micEcon package has an insertCol command, but that is for
matrices, not data frames. I have looked
2007 Jan 19
4
Newbie question: Statistical functions (e.g., mean, sd) in a "transform" statement?
Greetings listeRs -
Given a data frame such as
times
time1 time2 time3 time4
1 70.408543 48.92378 7.399605 95.93050
2 17.231940 27.48530 82.962916 10.20619
3 20.279220 10.33575 66.209290 30.71846
4 NA 53.31993 12.398237 35.65782
5 9.295965 NA 48.929201 NA
6 63.966518 42.16304 1.777342 NA
one can use "transform" to
2007 Jan 09
3
dimensions of a all objects
Why will the following command not work
sapply(objects(),dim)
What does it say about the objects list? What does it say about the dim
command?
Likewise, the following also does not work
all<-ls()
for (f in all) print(dim(f))
--
Farrel Buchinsky
[[alternative HTML version deleted]]
2009 Jan 13
1
Summary of Total Object.Size in R Script
Dear all,
Is there a way we can find the total object.size of
all the objects in our R script?
The reason we want to do this because we want to know
how much memory does our R script require overall.
Rprofmem(), doesn't seem to do it.
and Unix 'top' command is dynamic and
it doesn't give the exact byte size.
- Gundala Viswanath
Jakarta - Indonesia
2006 May 13
2
What does it mean to be "masked from data" when attaching? (Newbie question)
I have several data frames, each with six variables and several hundred
cases broken out from a larger dataframe by eleven values of a factor
called "Division". I have to perform the same analysis on each one. I
would like to do it by creating a data frame called data2 eleven times,
once with data corresponding to each value of the factor, and performing
the same analysis on each of
2007 Jan 26
2
Use a text variable's value to specify another varaible?
Greetings guRus --
If a variable, e.g., 'varname', is a character string, e.g. varname <-
"datavector", and I want to apply a function, such as table(), to
datavector, what syntax or method will do so using only the variable
varname? This seems similar to indirect addressing, but I have not seen
a method for it in the R manuals. Is there a general name for such
indirect
2005 Sep 22
7
Automatic creation of file names
Dear R-Help members,
I have a question about how to save to the hard drive the one thousand
datasets I generated in a simulation. The datasets are created in a
"for" loop that repeatedly creates normally distributed datasets, such
as the example below:
Library(MASS)
for (number in 1:1000) {
dataset = mvrnorm(n = 400, mu = c(0,0,0),
Sigma =
2007 Jan 04
2
Seek general information about time/date storage and functions in R
Hello R List -
I have to import Excel files (either as .csv files or using RODBC) into
R (2.4.1, Windows) and operate on dates and times (e.g. find minutes
between times, change dates to days of week or analyze by weeks of
year). The help files for format.Date, strptime, as.POSIX,
DateTimeClasses, etc. etc. are informative but perhaps a little terse.
I have googled unsuccessfully for a more
2002 Jul 10
5
plotting only text as a table
Dear R-Gurus,
I am preparing a multiple-plot-sheet with 2rows and 2 columns, but there
are actually only 3 plots to plot.
the 4. part of my sheet should contain a table with simple statistic
values like n, mode, standard deviation....
I cannot handle to plot the information in the plot. the summary()
function prints it to the xtrem instead of the plot.
Here is an example-plot with the 3 plots
2005 Jun 20
1
Factanal loadings as large as 1.2 with promax -- how unusual?
I am performing a large (105 variable) factor analysis with factanal,
specifying promax rotation. I kow that some loadings over 1.0 are not
unsual with that rotation, but I have some as large as 1.2, which seems
extreme. I am skirting the assumptions of the model by using responses
on a 7-point rating scale as data; I may have to go back and compute
polychoric correlations instead of product
2007 Feb 12
1
'Save Workspace' gives "recursive default argument reference" -- workaround?
When signing off R or trying to save a workspace in Windows XP pro SP2,
I receive the following error message -
save.image("C:\\Program Files\\R\\R-2.4.1\\Responses3.RData")
Error in save.image("C:\\Program Files\\R\\R-2.4.1\\Responses3.RData") :
recursive default argument reference
Everything else seems to work fine, and the only function I have written
2007 Jan 16
1
RODBC: sqlQuery is successful, but a similar sqlFetch returns error
Greetings guRus --
I have successfully queried a large (24,445 rows by 281 cols.) in-house
database using the following RODBC query (without the line breaks)
testout <- sqlQuery(channel, "select idSchedule,EXCL_Total from
dbo.vwC1198_2006_RawData_With_CMPL_EXCL")
This returns a dataframe of 24445 rows and two columns (as intended),
but the following command
testout
2005 Nov 22
2
(PR#8337) formatC adds leading space -- on some Windoze
>>>>> "KevinW" == Kevin Wright <kwright68 at gmail.com>
>>>>> on Mon, 21 Nov 2005 18:13:36 +0100 (CET) writes:
KevinW> Full_Name: Kevin Wright
KevinW> Version: 2.2.0
KevinW> OS: Windows 2000
^^^^^^^
this must be part of the problem
KevinW> Submission from: (NULL) (170.54.58.4)
KevinW> Apologies if
2008 May 28
1
Can plot() be used for multiple plots?
Greetings helpRs --
I would like to use plot() to plot two cumulative distribution curves so
that a user of the plot can compare the distributions of the two
variables. The following code draws two distributions separately, but I
cannot find the instruction necessary to add a second cumulative
distribution to the first one.
Any suggestion would be very welcome.
x1 <-
2007 Mar 12
1
Can one set box line width within the matplot command?
Hello R users --
I am using matplot to prepare graphs and cannot find a way to use (for
example) box(lwd=3) within the matplot command and instead have been
setting the box line width after drawing the graph, by using box(lwd =
3). Looking over the ?par options and the matplot() help I do not see a
way to set box width within matplot. Is there such an option?
Thanks for suggestions,