Displaying 20 results from an estimated 1000 matches similar to: "Differentiate alphanumeric vs numeric strings"
2008 Dec 15
3
Reading from Google Docs
I saw a thread from September 24 in which Duncan Temple Lang told us:
- The package currently has no Rd files, but there is a brief "user's
guide". The package is available from
http://www.omegahat.org/RGoogleDocs
I could not find it by using Tinn-R or RGui's package install tool.
Then when I went to the website I saw that package is only available
as
2008 Oct 03
1
Tinn-R explorer used to be my friend
I have upgraded everything lately and can no longer get the Tinn-R explorer
to work. I think I have had this problem before but cannot recall how I
solved it.I run Tinn-R 2.0.0.7 and Rgui version 2.7.2
When I click on the explorer button I get
> trObjList(envir='.GlobalEnv', pattern='', group='', path=.trPaths[3])
Error in trObjList(envir = ".GlobalEnv",
2007 Oct 02
2
Calculating proportions from a data frame rather than a table
When one has raw data it is easy to create a table of one variable against
another and then calculate proportions
For example
a.nice.table<-table(a,b)
prop.table(a.nice.table,1)
However, I looked at several papers and created a data frame of the
aggregate data. That means I acually created a table except it is a data
frame. The first column lists the name of the first author and the year.
I
2008 Dec 10
2
converting multiple columns from POSIX* to Date
converting a POSIX class variable to a date class is easy.
dates<-as.Date(x) #where X is of class POSIX
How does one do that to all columns in a data frame that are of POSIX
class and leave all the other columns (integers, factors) as is.
Feel free to reply with just one or two buzzwords that I could then
search for to find how to do it.
Farrel Buchinsky
2007 Sep 27
1
ifelse and dates do not work together: What workaround?
I encountered the above problem. I went to the help files and
discovered the reason why. My insight as to why it was happening did
not immediately provide me with a solution by which I could accomplish
what I needed to do. I turned to the help archive. I encountered a
thread on which somebody pointed this problem out and was mildly
castigated for not having looked at the help file. Alas no
2007 Dec 14
6
Analyzing Publications from Pubmed via XML
I would like to track in which journals articles about a particular disease
are being published. Creating a pubmed search is trivial. The search
provides data but obviously not as an R dataframe. I can get the search to
export the data as an xml feed and the xml package seems to be able to read
it.
xmlTreeParse("
2009 Jul 19
4
space in column name
I read a table from Microsoft Access using RODBC. Some of the variables had
a name with a space in it.
R has no problem with it but I do.
I cannot find out how to specify the space
names(alltime)
[1] "ID" "LVL7" "Ref Pv No" "Ref Pv Name" "DOS"
"Pt Last Name" "Pt First Name" "MRN"
2006 Nov 29
2
reshape command is (stats) dropping instances
I would really appreciate it if anyone could determine what is going
on with the following command. It is only half-working and is losing
lots of data. For the life of me I cannot even see the pattern of what
it is losing and what it is not.
I am attaching the R data set which you can use with the Load
Workspace menu function.
2009 Dec 10
3
Have you used RGoogleDocs and RGoogleData?
Both of these applications fulfill a great need of mine: to read data
directly from google spreadsheets that are private to myself and one or two
collaborators. Thanks to the authors. I had been using RGoogleDocs for the
about 6 months (maybe more) but have had to stop using it in the past month
since for some reason that I do not understand it no longer reads google
spreadsheets. I loved it. Its
2009 Mar 24
2
two different date formats in the same variable
How does one convert to a date format when survey respondents have
used two different date formats whilst entering their data. There were
clearly told to use mm/dd/yyyy but humans being humans some entered
mm/dd/yy. There was even validity checks on the forms but I allowed
them to be overridden since the data is more holy than the format.
The data was downloaded as a csv and read.csv was used 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]]
2006 Nov 24
1
Sunflower plot error; how to deal with NA
I suspect the problem stems from the fact that there are a couple of NA
values.
> sunflowerplot(lastoto,maxear)
Error in rep.int(i.multi, number[number > 1]) :
invalid number of copies in rep.int()
So I used the subset command to get rid of the cases with NA
hell<-subset(ChinOtoMayB,is.na(lastoto)==FALSE)
Then it worked perfectly
sunflowerplot(hell$lastoto,hell$maxear)
Is
2009 Jan 23
2
forward slash vs double backslash R and Tinn-R
I installed the newest version of R and once again ran into problem
with Tinn-R failing when trying to use the R explorer. I had this
problem once before and solved it when I added the following
.trPaths = c(
'C:/Documents and Settings/fbuchins/Application Data/Tinn-R/tmp/',
'C:/Documents and Settings/fbuchins/Application Data/Tinn-R/tmp/search.txt',
'C:/Documents and
2006 Apr 29
3
Writing responses to the R-Help list
A while back Gabor Grothendieck suggested that I try
http://news.gmane.org/gmane.comp.lang.r.general. This was after I asked how
to easily reply to posts on the listserve. Ideally I would like the
functionality that I find in Microsoft Outlook Express newsreader for usenet
groups or what I find in Google Groups.
I started using gmane about 3 weeks ago. I find it fantastic for searching
and for
2006 May 03
5
Listing Variables
How does one create a vector whose contents is the list of variables in a
dataframe pertaining to a particular pattern?
This is so simple but I cannot find a straightforward answer.
I want to be able to pass the contents of that list to a "for" loop.
So let us assume that one has a dataframe whose name is Data. And let us
assume one had the height of a group of people measured at
2007 Jan 01
1
Subset by using multiple values
I have a vector containg about 20 unique values. It is called rejectrs$rs.
It is a factor
I have a data frame with about 100000 rows.
I want to exclude all rows where in variable rs the value is one of the 20
on the exclude list. I thought this would work but none did.
RawSeqBig<-subset(RawSeqBig,ASSAY_ID!=rejectrs$rs)
RawSeqBig<-subset(RawSeqBig,ASSAY_ID!=list(rejectrs$rs))
--
Farrel
2008 Oct 28
1
outputting (writing) output into a dataframe
I have solved this problem once before but don't recall exactly how.
Is there a url that shows how?
What I want to do now is quite specific but my query is actually very general
There are many functions in which one specifies several parameters and
an output is generated. Well what happens if one wants to specify a
range of parameters and have the output written to a data frame.
To
2009 May 06
11
Do you use R for data manipulation?
Is R an appropriate tool for data manipulation and data reshaping and data
organizing? I think so but someone who recently joined our group thinks not.
The new recruit believes that python or another language is a far better
tool for developing data manipulation scripts that can be then used by
several members of our research group. Her assessment is that R is useful
only when it comes to data
2007 Feb 05
3
RSNPper SNPinfo and making it handle a vector
If I run an analysis which generates statistical tests on many SNPs I would
naturally want to get more details on the most significant SNPs. Directly
from within R one can get the information by loading RSNPer (from
Bioconductor) and simply issuing a command SNPinfo(2073285). Unfortunately,
the command cannot handle a vector and therefore only wants to do one at a
time.
I tried the lapply and
2007 Jun 19
1
genetics package not working
Has something changed in R that requires an update in the genetics package
by Gregory Warnes? I am using R version 2.5.0
This used to work
> summary(founders[,59])
to prove that it is a genotype class
> class(founders[,59])
[1] "genotype" "factor"
Now when I issue the command:
> summary(founders[,59])
I get:
Error in attr(retval, "which") <- which :