Displaying 20 results from an estimated 27 matches for "sbpurohit".
2011 Nov 07
2
help with formula for clogit
I would like to know if clogit function can be used as below
clogit(group~., data=dataframe)
When I try to use in above format it takes a long time, I would appreciate
some pointers to get multiple combinations tested.
set.seed(100)
d=data.frame(x=rnorm(20)+5,
x1=rnorm(20)+5,
x2=rnorm(20)+5,
x3=rnorm(20)+5,
x4=rnorm(20)+5,
x5=rnorm(20)+5,
x6=rnorm(20)+5,
x7=rnorm(20)+5,
x8=rnorm(20)+5,
2009 Aug 28
1
extracting pvalues from ttest
Hello list,
I have a similar issue as this post
http://tolstoy.newcastle.edu.au/R/e6/help/09/04/11438.html#options2 and I
used the suggestion provided by Jorge with modifications to my data
do.call(c,lapply(your_list_with_the_t_tests,function(x) x$p.value))
but I am getting the following error after excuting the code
B<-by(eo,eo$PlateID, function(.sub) t.test(mcp1~Self_T1D,data=.sub,
2011 Oct 17
1
calculating ratios from all combinations
so here is the code I need help to fix the line for 'st' when it reaches
maximum, that's where i am getting stuck.
thanks
Sharad
set.seed(100)
d=data.frame(x=rnorm(20)+5,
x1=rnorm(20)+5,
x2=rnorm(20)+5,
x3=rnorm(20)+5,
x4=rnorm(20)+5,
x5=rnorm(20)+5,
x6=rnorm(20)+5,
x7=rnorm(20)+5,
x8=rnorm(20)+5)
r2=c()
cinit=0
for (col in 1:9)
{
cinit=cinit+1
st=cinit+1
2009 Mar 07
2
ttest in R
Dear list,
i am a biologist who needs to do some ttest between disease and non disease,
sex, genotype and the serum levels of proteins on a large number of
individuals. i have been using excel for a long time but it is very tedious
and time consuming. i am posting the data below and ask your help in
generating a code to get this analysis done in R. thanks
gender disease genotype data
M N CC
2011 May 19
3
A better way to do this
Hello gurus,
I have a dataframe containing two groups viz., 'control' and 'case', each of
these groups contains longitudinal data for 100 subjects. I have to plot all
these subjects on a single chart and then put a regression line for each of
the group for all the subjects. I have written a function to do the chart
grpcharts<-function (dat, group,group2,molecule,cutoff){
2011 Oct 27
2
help with paste
Hello gurus,
I have some variables, and i am creating combinations for analysis in the
end i need these variables to be displayed like "LEPTIN+SAA+PTH". currently
i am using loop to perform this. I would appreciate any pointers to do it
without the loop.
> mols=c("LEPTIN","SAA","PTH","sEGFR")
> samples=mols[1:3]
> samples
[1]
2010 Oct 20
3
Plot creates a straigth line
Hello all, I am using 'plot' to create standard curves for elisa data. when I
use 'plot' with type='b' i get the points connected with lines and one
straigth line from the lowest datapoint to the highest data point. how can i
avoid/remove it from the figure. i am using R2.9.1, below is the example of
the data.
od<-c(10, 8, 6,4,2,1, 10.5,7.8,6.4,3.8,2.1,0.95)
2011 Apr 13
1
error for ttest
Hello all,
I have arranged my data as per Dennis's suggestion in this post
http://www.mail-archive.com/r-help at r-project.org/msg107156.html.
the posted code works fine but when I try to apply it to my data, i get ">
u2 <- ddply(xxm, .(plateid, cytokine), as.data.frame.function(f))
Error in t.test.formula(conc ~ Self_T1D, data = df, na.rm = T) :
grouping factor must have
2011 Aug 18
4
splitting sample names
I have a data frame like this
xx<-data.frame(cbind(Sample=c('Ctrl_6h','1+0_6h','1+200_6h','1+5k_6h','Ctrl_5K_6h','ConA_6h'),
IFIT1=c(24,25,24.7,24.5,24.2,24.8)))
grep('[[:digit:]]h',xx$Sample)
yy<-xx$Sample
strsplit(yy,"_")
I have to extract the time information separated by '_' in the sample
2010 Sep 27
2
subtraction based on two groups in a dataframe
Hello
I have a data set like below:
plate.id well.id Group HYB rlt1
1 P1 A1 Control SKOV3hyb 0.190
2 P1 A2 Control SKOV3hyb 0.210
3 P1 A3 Control SKOV3hyb 0.205
4 P1 A4 Control SKOV3hyb 0.206
5 P1 A5 Control SKOV3hyb 0.184
385 P1 A1 ovca SKOV3hyb 0.184
386 P1 A2 ovca SKOV3hyb 0.229
387
2011 Apr 13
5
Clearing Console; of weeks of codes!
Dear All:
I do see I have weeks of codes in my console when I check with my arrow up
keys. I have been clearing them with Control L but it seems to clear it
clear the screen temporally. I do see the previous codes again when I open R
the next day, after quitting the session!
Q:
How do I clear this?
Thanks;
YA
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2011 Dec 20
5
Help with code
hello gurus,
i have a data frame like this
HTN HTN_FDR Dyslipidemia CAD t1d_ptype[1:25]
1 Y Y Y T1D
2 T1D
3 Ctrl_FDR
4 T1D
5 Y Ctrl
6 Ctrl
7
2008 Dec 26
1
starting values update
...; 32 629.6
> 33 2250.1
> ...
>
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Sent from the R help mailing list archive at Nabble.com.
------------------------------
Message: 15
Date: Thu, 25 Dec 2008 07:26:46 -0800 (PST)
From: 1Rnwb <sbpurohit@gmail.com>
Subject: Re: [R] creating standard curves for ELISA analysis
To: r-help@r-project.org
Message-ID: <21168216.post@talk.nabble.com>
Content-Type: text/plain; charset=us-ascii
Thank you for your suggestions, I am sorry that
http://www.nabble.com/file/p21168216/ds2_panelA_p8_B3_...
2011 Aug 08
1
msProcess, creating msSet file(s)
I have 120 MS chromatograms containing two columns'Time' and 'Peak height'.
how do in create a msSet file which is required by all the functions of
'msProcess' to process these files.
I would appreciate help very much.
Thanks
Sharad
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Sent from the R help
2010 Oct 20
1
grep
Hi
I have a script which is designed to gather data from individual columns
from a file, which is an output from an instrument. the file has multiple
sections and each a section has data under each column (vars), I am using
the name of the column as a variable to gather the column ID using
vidx<-grep(vars[vi],gsub("[[:punct:]]","",strrl1[[datbeg-1]]),ignore.case=T)
the
2011 May 04
1
merging multiple columns from two dataframes
Hello,
I have data in a dataframe with 139104 rows which is multiple of 96x1449. i
have a phenotype file which contains the phenotype information for the 96
samples. the snp name is repeated 1449X96 samples. I haveto merge the two
dataframes based on sid and sen. this is how my two dataframes look like
dat<-data.frame(snpname=rep(letters[1:12],12),sid=rep(1:12,each=12),
2011 May 12
1
log transformation and mean question
I have question about log2 transformation and performing mean on log2 data. I
am doing analysis for ELISA data. the OD values and the concentration
values for the standards were log2 transformed before performing the lm. the
OD values for samples were log2 transformed and coefficients of lm were
applied to get the log2 concentration values. I then backtransformed these
log2 concentrations and the
2012 Jan 29
1
height of plots
Hello R gurus,
I have to create 12 plots, I have been using the following script, which
leaves a large white space between two plot. I would appreciate if someone
can suggest an alternative to reduce the white space.
par(mar=c(3,3,.5,.5))
split.screen(c(6,2)) # split display into two screens
for (i in 1:12)
{
if (i<11)
{
screen(i)
plot(1:10,xaxt='n', xlab='',
2012 Mar 20
0
labeling rows in heatmap.2
how can i put the row labels on the left hand of the heatmap in heatmap.2?
abnr<-structure(c(1, 0.678622097406395, 0.670294749652918,
-0.0016314464654279,
-0.000519068106572792, 0.199581999119988, -0.0106623494189115,
0.0840111691399559, -0.0461494399639137, 0.249279171677728, NA,
1, 0.757114062773504, 0.0352642759270137, -0.0255518450373996,
0.0943268190664674, -0.0536269679247722,
2011 May 26
2
matching by gender and age
Hello R gurus, I have a data set from which i have to extract the gender and
age matched rows from controls and disease group
disease<-paste(rep(c('y','n'),11))
gender<-paste(rep(c('m','f'),11))
mcp<-rnorm(700,1400)
age<-rnorm(32,34)
dat<-data.frame(disease=disease,sex=gender,Dr_age=age[1:22],MCP=mcp[1:22])
I have other categorical variables also to