Displaying 20 results from an estimated 140 matches similar to: "Re: R 1.7.x and inaccurate log1p() on OpenBSD 3.2 and NetBSD 1.6 (PR#3979)"
2012 Mar 28
2
Data extraction
Dear ReXperts,
I have the below text file output. I need to extract the T, QC, QO, QO-QC
and WT columns for
the data between T = 10 and T=150.
Any ideas?
Thanks in advance.
========================================================================================
1 D C ---CAT-- T THETA QC QO
QO-QC QC/QO WT FSD
8 1 0 1.0000E+01
2009 Dec 07
1
anova/factor
Dear Wiza[R]ds,
I have the following data in a data.frame. I need to do an anova with
multiple comparison but I don't know how to factor the groups for analysis.
There are 3 groups, 1,2 and 3 labelled in column 1. Help appreciated with
thanks in advance.
Group SI Sif SG Io I2 lol2
1 9.08e-05 9.08e+00 0.060842287 1.798556446 32.574500
2013 Dec 09
1
Trouble with upgrading - RBS T1
Upgrading an ancient customer installation... was running 1.4.23.1
(Trixbox) with Zaptel 1.4.12.9 and a Sangoma A102D, which has been
running fine for 5+ years. Customer getting anxious about hardware
failure, so we built a new box and installed 1.8.24.0, Dahdi 2.7.0.1,
and a new Sangoma A104D. The single active span is an RBS T1
B8ZS/ESF/E&M Wink.
I tried to move one span over one
2012 Apr 22
1
Survreg
Hi all,
I am trying to run Weibull PH model in R.
Assume in the data set I have x1 a continuous variable and x2 a
categorical variable with two classes (0= sick and 1= healthy). I fit the
model in the following way.
Test=survreg(Surv(time,cens)~ x1+x2,dist="weibull")
My questions are
1. Is it Weibull PH model or Weibull AFT model?
Call:
survreg(formula = Surv(time, delta) ~ x1
2007 May 26
1
How to get the "Naive SE" of coefficients from the zelig output
Dear R-user:
After the fitting the Tobit model using zelig, if I use the following command then I can get the regression coefficents:
beta=coefficients(il6.out)
> beta
(Intercept) apache
4.7826 0.9655
How may I extract the "Naive SE" from the following output please?
> summary(il6w.out)
Call:
zelig(formula = il6.data$il6 ~ il6.data$apache, model =
2013 Aug 28
1
Memory allocation in read.table
Hi all,
I've been trying to learn more about memory profiling in R and I've
been trying memory profiling out on read.table. I'm getting a bit of a
strange result, and I hope that someone might be able to explain why.
After running
Rprof("read-table.prof", memory.profiling = TRUE, line.profiling = TRUE,
gc.profiling = TRUE, interval = interval)
diamonds <-
2007 Jun 18
1
psm/survreg coefficient values ?
I am using psm to model some parametric survival data, the data is for
length of stay in an emergency department. There are several ways a
patient's stay in the emergency department can end (discharge, admit, etc..)
so I am looking at modeling the effects of several covariates on the various
outcomes. Initially I am trying to fit a survival model for each type of
outcome using the psm
2010 May 28
1
something like vlookup in R?
Hi r users,
I would like sort of
cdf seq rand
0.00E+00 0 0.262123478
1.56E-03 20 0.964293344
1.55E-02 40 0.494827113
5.30E-02 60 0.733726005
1.16E-01 80 0.800408948
1.97E-01 100 0.925748466
2.88E-01 120 0.047578356
3.80E-01 140 0.266060366
4.68E-01 160 0.125522629
5.48E-01 180 0.701193274
6.18E-01 200 0.915799432
2010 May 28
4
vlookup in R?
Hi R-users,
I would like to search for the values of seq that match my rand values. In excel I will use =VLOOKUP(G2,$E$2:$F$32,2). For example, for rand=.262 it will give me approximately seq=120 and rand=0.964293344, seq=460 and etc.
E F G
cdf seq rand
0.00E+00 0 0.262123478
1.56E-03 20 0.964293344
1.55E-02 40 0.494827113
5.30E-02 60
2010 Nov 25
2
aftreg vs survreg loglogistic aft model (different intercept term)
Hi, I'm estimating a loglogistic aft (accelerated failure time) model, just a
simple plain vanilla one (without time dependent covariates), I'm comparing
the results that I obtain between aftreg (eha package) and survreg(surv
package). If I don't use any covariate the results are identical , if I add
covariates all the coefficients are the same until a precision of 10^4 or
10^-5 except
2001 Nov 26
1
Sorting Posix Data
I have a fairly large set of data with the following attributes:
>str(raw.data)
`data.frame': 1429 obs. of 16 variables:
$ TStamp :`POSIXlt', format: chr "2001-11-25 02:00:00" "2001-11-25
01:55:00" "2001-11-25 01:50:00" "2001-11-25 01:45:00" ...
$ iPDT.AHU14.14: num 0.0122 0.0125 0.0120 0.0120 0.0122 ...
$ iPDT.AHU14.15: num 0.0121
2012 Dec 14
1
format.pval () and printCoefmat ()
Hi List,
My goal is to force R not to print in scientific notation in the sixth column (rel_diff - for the p-value) of my data frame (not a matrix).
I have used the format.pval () and printCoefmat () functions on the data frame. The R script is appended below.
This issue is that use of the format.pval () and printCoefmat () functions on the data frame gives me the desired results, but coerces
2012 Jul 10
5
-1.1 - 0.1 + 1.2 is NOT null! Why?
Hello,
I fear its a stupid question,..but here it is:
If I do this simple calculation with the R console, I surprisingly do not
get a zero. Why?
-1.1-0.1+1.2
[1] -2.220446e-16
greetings, Ole
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2012 Aug 03
1
SEM standardized path coefficients
Hello,
I have conducted an SEM in which the resultant standardized path coefficients are much higher than would be expected from the raw correlation matrix. To explore further, I stripped the model down to a simple bivariate relationship between two variables (NDVI, and species richness), where it's my understanding that the SEM's standardized path coefficient should equal the correlation
2005 Mar 14
0
Parameters of Weibull regression
Dear list, dear Frank,
I try to fit a Weibull survival regression model with package Design:
sclear <- psm(sobj~V1+V2,dist="weibull")
sobj is a one-dimensional survival object (no event indicators), V1 and V2
are factors.
I get the following result:
Parametric Survival Model: Weibull Distribution
psm(formula = sobj ~ V1 + V2, dist = "weibull")
Obs Events
2004 Mar 17
0
mva :: prcomp
Dear R-list users,
I'm new to principal components and factor analysis.
I thought this method can be very useful for me to find relationships
between several variables (which I know there is, only don't know which
variables exactly and what kind of relation), so as a structure
detection method.
Now, I'm experimenting with the function prcomp from the mva package.
In my source code
2005 May 03
0
Survival
Dear list,
I made survival analysis using Weibull regression.
I got significance in the analysis:
>anova(m1)
Df Deviance Resid. Df -2*LL P(>|Chi|)
NULL NA NA 2158 4933.109 NA
tratt -8 577.0669 2150 4356.042 1.988317e-119
and
> summary(m1)
Call:
survreg(formula = Surv(tempo, sensore) ~ tratt)
Value Std. Error z p
2009 Dec 03
3
Tobit model fluid milk consumption
Hi all,
I'm from Brazil.
I fit a Tobit model to FLUID MILK CONSUMPTION (DEPENDENT VARIABLE) data
using survreg (attached).
I am confused about the output interpretation and I would like yours
explanations.
Thanks, Marcio Roberto Silva
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2002 Feb 28
4
pexp.c (PR#1335)
Full_Name: M Welinder
Version: 1.4
OS: (src)
Submission from: (NULL) (192.5.35.38)
It seems to me that pexp can be improved in the lower_tail=TRUE and log_p=FALSE
case by using expm1. Something like
-expm1 (-x / scale);
I think.
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2017 Feb 17
4
Wish List: Extensions to the derivatives table
The derivative table resides in the function D. In S+ that table is extensible because it is written in the S language. R is faster but less flexible, since that table is programmed in C. It would be useful if R provided a mechanism for extending the derivative table, or barring that, provided a broader table. Currently unsupported mathematical functions of one argument include expm1, log1p,