Displaying 20 results from an estimated 600 matches similar to: "Saving long character variable to database saves timestamp instead"
2007 Nov 08
2
mapply, coxph, and model formula
Hello -
I am wanting to create some Cox PH models with coxph (in package
survival) using different datasets.
The code below illustrates my current approach and problem with
completing this.
### BEGIN R SAMPLE CODE ##############################
library(survival)
#Define a function to make test data
makeTestDF <- function(n) {
times <- sample(1:200, n, replace = TRUE)
event
2010 Jul 13
2
Zoo - bug ???
Hi folks,
I am confused whether the following is a bug or it is fine
Here is the explanation
a <- zoo(c(NA,1:9),1:10)
Now If I do
rollapply(a,FUN=mean,width=3,align="right")
I get
> rollapply(a,FUN=mean,width=3,align="right")
3 4 5 6 7 8 9 10
NA NA NA NA NA NA NA NA
But I shouldn't be getting NA right ? i.e for index 10 I should get
(1/3)*(9+8+7)
2007 Aug 07
2
backslash c
How do I get output with "\color{blue}", i.e. with
only one backslash???
> "\color{blue}"
[1] "color{blue}"
Warning messages:
1: '\c' is an unrecognized escape in a character
string
2: unrecognized escape removed from "\color{blue}"
> "\\color{blue}"
[1] "\\color{blue}"
>
Any help greatly appreciated.
Best regards,
2007 Dec 30
3
Date formats
Is the following expected behaviour for a date used in
an ifelse function?
> date <- Sys.Date()
> date
[1] "2007-12-30"
> ifelse(TRUE, date-1, date)
[1] 13876
> ifelse(FALSE, date-1, date)
[1] 13877
> ifelse(TRUE, as.character(date-1), date)
[1] "2007-12-29"
> if (TRUE) {date}
[1] "2007-12-30"
It would seem more natural to me if a date produced
2010 Oct 20
1
need for speed on grid.rect
When I use grid.rect to print a multi-coloured grid, it is incredibly slow compared to a single colour grid, or even a two colour grid.
I've set out some simplified examples below. This is something I run literally thousands of times a day, so I would greatly appreciate any hints on how I might improve the speed???
library(grid)
pushViewport(viewport(
width = unit(100,
2007 Sep 30
1
clipping viewports
Dear useRs,
Why are the rotated blue and yellow boxes in the example below clipped outside of 6 x 6 inch window in the middle of the page?? Where does the 6 x 6 inch window come from? I would like to make use of the entire page.
> library(grid)
> pdf(file = "FarmMaps.pdf", paper = "a4")
> pushViewport(viewport(
+ width = unit(7.6, "inches"), height =
2013 Sep 16
1
Patch: fix segfault from empty raster
Hi,
A colleague recently came across an R crash, which I can boil down to
the following, running under Rgui on Windows 7:
library(ggplot2)
ggplot(data.frame(x=1, y=1, z=4.7), aes(x, y, z=z)) + stat_summary2d()
This reliably causes a segmentation fault. sessionInfo() below.
What's happening is that (for reasons which I'll discuss with the
ggplot2 developers) the 'colorbar'
2008 Mar 28
1
cpu usage high with windows change dir / winDialogString (PR#11045)
Good afternoon,
This is possibly a windows only bug, definitely of comparatively low
importance - but for the sake of completeness here we go. I've
searched http://bugs.R-project.org/ etc., but can find no mention.
For RGui.exe, the CPU usage goes to 100% for certain dialog boxes for
the duration that the dialog box is visible, e.g.
* check CPU usage is low
* On the RGui.exe menu chose
2011 Oct 01
1
error using ddply to generate means
Dear list,
I encounter an error when I try to use ddply to generate means as follows:
fun3<-structure(list(sector = structure(list(gics_sector_name = c("Financials",
"Financials", "Materials", "Materials")), .Names = "gics_sector_name",
row.names = structure(c("UBSN VX Equity",
"LLOY LN Equity", "AI FP Equity",
2009 Sep 16
3
apply function across two variables by mult factors
Greetings,
I am attempting to run a function, which produces a vector and
requires two input variables, across two nested factor levels. I can
do this using by(X, list(factor1, factor2), function), however I
haven't found a simple way to extract the list output into an
organized vector form. I can do this using nested loops but it isn't
exactly an optimal approach.
Thank you
2008 Mar 29
0
cpu usage high with windows change dir / winDialogString (PR#11051)
On 28/03/2008 12:05 PM, seanpor at acm.org wrote:
> Good afternoon,
>
> This is possibly a windows only bug, definitely of comparatively low
> importance - but for the sake of completeness here we go. I've
> searched http://bugs.R-project.org/ etc., but can find no mention.
>
> For RGui.exe, the CPU usage goes to 100% for certain dialog boxes for
> the duration that
2012 Jan 06
1
ggplot using scale_x_date gives Error in seq.int(r1$year, to$year, by)
Dear all,
ggplot gives me an error when trying to plot time series data using a
date variable as the x axis.
g<-structure(list(Date = c("2011-12-23", "2011-12-30", "2012-01-06",
"2011-12-23", "2011-12-30", "2012-01-06", "2011-12-23", "2011-12-30",
"2012-01-06"), variable = structure(c(1L, 1L, 1L, 2L, 2L,
2012 Nov 13
0
GAM model to reduce PACF of a model
I have asked this question on Stackoverflow and was told it does not relate
to the sites' mission as it is statistical question, thus I brought it here.
I am fitting a gam mode in the mgcv package to study associations of
environmental pollutants and mortality. The aim is to choose a model with
lowest mgcv and also to reduce the PACF to less than < |0.1|.
library(gamair)
library(mgcv)
2009 Mar 20
4
how to make aggregation in R ?
Hi,
I am trying to aggregate the sum of my test data.frame as follow:
testDF <- data.frame(v1 = c("a", "a", "a", "a", "a", "b", "b", "b", "b",
"b", "c", "c", "c", "c", "c", "d", "d", "d", "d",
2011 Mar 09
2
SQLDF - Submitting Queries with R Objects as Columns
Fellow R programmers,
I'd like to submit SQLDF statements with R objects as column names.
For example, I want to assign "X" to "var1" (var1<-"X") and then refer to
"var1" in the SQLDF statement. SQLDF needs to understand that when I
reference "var1", it should look for "X" in the dataframe.
This is necessary because my SQLDF
2008 Feb 26
1
wrapper for save function
Hello -
I would like to create a wrapper to the 'save' function in the base
package, but have a small problem with the name of the object that is
getting saved in the file. Below is a simple example illustrating my
problem.
## BEGIN SAMPLE R CODE
##################################################
## Here is the wrapper for the save function
2007 Feb 20
1
Difficulties with dataframe filter using elements from an array created using a for loop or seq()
Hi All-
This seems like such a pathetic problem to be posting about, but I have no
idea why this testcase does not work. I have tried this using R 2.4.1,
2.4.0, 2.3.0, and 2.0.0 on several different computers (Mac OS 10.4.8,
Windows XP, Linux). Below the signature, you will find my test case R code.
My point in this folly is to take a dataframe of 300,000 rows, create a
filter based on two
2011 Jan 01
3
Retrieving Factors with Levels Ordered
Hello (and Happy New Year),
When I create a factor with labels in the order I want, write the data as a text file, and then retrieve them, the factor levels are no longer in the proper order.
Here is what I do (I tried many variations):
# educ is a numeric vector with 1,001 observations.
# There is one NA
# Use educ to create a factor
feducord <- factor(educ, labels = c('Elem',
2007 Nov 09
2
wrapper for coxph with a subset argument
Dear R-help -
Thanks to those who replied yesterday (Christos H. and Thomas L.)
regarding my question on coxph and model formula, the answers worked
perfectly.
My new question involves the following.
I want to run several coxph models (package survival) with the same
dataset, but different subsets of that dataset.
I have found a way to do this, described below in functions subwrap1 and
2007 Dec 19
1
Different labels by panel in barchart
Dear all,
I'm analysing a survey, and creating a barchart of the different responses
for each question. The questions are grouped according to a number of
categories, so I'm using lattice to create a plot with each question in a
category on it. The problem is that the response set for different
questions within the same category varies. I want to be able to draw only
the relevant