Displaying 20 results from an estimated 4000 matches similar to: "Length problem"
2008 Sep 20
2
AUC / ROC for presence only.
Dear all,
I have a probability of presence of distribution of a species of interest
(varying from 0 to 1 in continuous form) and I have a set of points
where I know that species really occurs. But I don´t have points of absence.
So, for each true presence I know the estimated presence.
I would like to know how can I compute AUC, taking account these
Available data.
Best wishes,
2011 Aug 17
2
dotchart vs. dotplot ... groups
I'm trying to create a dotplot with some grouping.
I've been able to create what I want using dotchart (basic graphics), but can't quite get it using dotplot (lattice). I prefer to use lattice (or ggplot2) because I think it's a bit easier to control some other aspects of the plot appearance.
Basically, w/ lattice I've not been able to get the y-axis label to include the
2018 Dec 28
2
[PATCH v2 nbdkit] common: Improve pseudo-random number generation.
v2:
- Fix seeding.
- Add a test that nbdkit-random-plugin is producing something
which looks at least somewhat random.
Rich.
2008 Jan 26
1
Read stata file from internet?
Dear R-helpers,
I would like to have my students read into R an online Stata dataset: 'http://www.stat.ucla.edu/projects/datasets/risk_project.dta'
I was able to read it into R after downloading it and converting it
with StatTransfer (http://www.stattransfer.com/).
Here is what happens when I use read.dta() as I would use read.table():
> require(foreign)
> risk2 <-
2017 Jun 29
0
Different date formats in one column
I doubt your actual file looks like the mess that made it to my email
software (below) because you posted HTML-format email. Read the Posting
Guide, and in particular figure out how to send plain text email.
You might try the "anytime" contributed package, though I suspect it too
will choke on your mess. Otherwise, that will pretty much leave only a
brute-force series of regular
2005 Jun 06
3
write.dta limits
Hope everyone id doing great ..
Just need some clarification over the limit of write.dta. I have some
coauthors that use stata and I need to send them my data in .dta format.
the data.frame is 41706x229 and I get the following
Error in write.dta(Panel, file = "STATADATA/Panel.dta", version = 7) :
a binary write error occured
Once I subset the data everything works out fine. my
2017 Jun 28
4
Different date formats in one column
Hi,?
I have a data set with various date formats in one column and not sure how to unify it.Here is a few formats:
02091702/22/170221201703/17/160015-08-239/2/1500170806May-2-201522-March-2014
I tried parse_date_time from lubridate library but it failed.Thanks so much.?Best,Farnoosh
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2007 Jun 25
7
R-excel
Good morning to everybody,
I have a problem : how can I import excel files in R???
thank you very much
Dr.sa. Erika Frigo
Università degli Studi di Milano
Facoltà di Medicina Veterinaria
Dipartimento di Scienze e Tecnologie Veterinarie per la Sicurezza Alimentare (VSA)
Via Grasselli, 7
20137 Milano
Tel. 02/50318515
Fax 02/50318501
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2018 Mar 22
3
exporting data to stata
Hi,
I am new to R and I want to export data into Stata. Could somebody help with that? Thanks a lot.
This is the code I am using:
> setwd("D:/datasets/Seg-bcn/ESBD")
> data1 <- readRDS("r17045_ESDB_Habitatges_BDD_V_1_0.rds")
> library(foreign)
> write.dta(data="data1", file = "D:/datasets/data1.dta")
Error in write.dta(data =
2008 Aug 06
3
Help in running Stata dataset in R
Dear All,
I installed R 2.7.0 and tried to call a dataset i had ealier own called
on R2.6.2 but i keep on getting an error:
use("maltreat.dta")
Error in fromchar(x) :
character string is not in a standard unambiguous format
Tried doing the same with R2.7.1 but i get the same error.
However if i call the same on R 2.6.2, there is no error:
use("maltreat.dta")
> des()
2000 Apr 04
0
stochastic process transition probabilities estimation
Hi all,
I'm new with R (and S), and relatively new to statistics (I'm a
computer scientist), so I ask sorry in advance if my question is silly.
My problem is this: I have a (sample of a) discrete time stochastic
process {X_t} and I want to estimate
Pr{ X_t | X_{t-l_1}, X_{t-l_2}, ..., X_{t-l_k} }
where l_1, l_2, ..., l_k are some fixed time lags. It will be enough for
me to compute
2017 Jun 29
1
Different date formats in one column
Thanks Jeff. This is a nice way of solving this problem. What about the cases with 0015-02-21?Many thanks.?Best,Farnoosh
On Wednesday, June 28, 2017 10:49 PM, Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote:
I doubt your actual file looks like the mess that made it to my email
software (below) because you posted HTML-format email. Read the Posting
Guide, and in particular
2011 Aug 06
3
.dta from e-mail
I got a .dta extension file by e-mail, but I can't save it in my computer
and open it in R. How can I do it?
[[alternative HTML version deleted]]
2010 Jun 21
1
survfit function - event information???
Hi all!
I am trying to extract output information from the survfit function in order
to generate a matrix of select output for multiple factors.
Specifically, I am interested in extracting the number of events (in the
output below: 106, 2, 3). The variable names represented in my function
(ee) are shown below, but none of those variables correspond to the column
of events as shown in the output.
2007 Jul 30
1
correlation and matrix
Dear everyone,
I am new in R and I've got difficulties in realizing the following
tasks:
-I have variables (factors) with different numbers of levels, either 1,
2 or 3.
-I have a matrix containing these 204 factors and I have to correlate
them by groups of 4 variables.
-I have to delete the factors just having one level ( because when
correlating one-level factors, the output is NA)
here
2018 Mar 22
1
exporting data to stata
On Thu, Mar 22, 2018 at 4:52 AM, Raja, Dr. Edwin Amalraj
<amalraj.raja at abdn.ac.uk> wrote:
> Hi ,
>
> library(foreign)
> write.dta(data1, "data1.dta")
>
> should work.
I don't think so:
> library(foreign)
> example(svydesign)
> write.dta(dstrat, "~/Downloads/foo.dta")
Error in write.dta(dstrat, "~/Downloads/foo.dta") :
The
2017 Sep 18
1
Data arrangement for PLSDA using the ropls package
Hello,
I would like to do a partial least square discriminant analysis (PLSDA) in R using the package "ropls"
Which is in R available via the R command :
source("https://bioconductor.org/biocLite.R")
I try to do a PLSDA to illustrate the impact of two genders (AP,C) on 5 compounds measured in persons (samples) should be illustrated. When I try to do a PLSDA I get the warning
2009 Nov 26
3
barchart() {Lattice} help.
Hi R Users,
I'm trying to plot a stacked barplot. Here is data:
Sample Col1 Col2 Col3
Row1 -2 4 -1
Row2 3 -2 4
Row3 3 5 -2
Row4 4 1 -1
I'm using following R code:
library(lattice)
dta<-read.table("data.txt", header=TRUE, row.names="Sample")
barchart(data.matrix(dta),
horizontal=FALSE,
stack=TRUE,
col=2:4,
2018 Mar 22
0
exporting data to stata
Hi ,
library(foreign)
write.dta(data1, "data1.dta")
should work. The file will be saved in the working directory.
Use
getwd()
to know the working directory.
Best wishes
Amalraj Raja
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of rosario scandurra
Sent: 22 March 2018 07:47
To: r-help at r-project.org
Subject: [R] exporting data to stata
2011 Nov 08
2
compare linear regressions
Hi,
I'm trying to compare two linear regressions. I'm using the
following approach:
##################
xx<-1:100
df1 <- data.frame(x = xx, y = xx * 2 + 30 + rnorm(n=length(xx),sd=10), g = 1)
df2 <- data.frame(x = xx, y = xx * 4 + 9 + rnorm(n=length(xx),sd=10), g = 2)
dta <- rbind(df1, df2)
dta$g <- factor(dta$g)