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drawing a plot with SEM
3 messages · ANJAN PURKAYASTHA, David Winsemius
Assume the object in question is a dataframe named "dm": apply(dm, 1, mean) It worries me that you are asking for the sem's of two element objects, but if you really want it, the obvious modification to the above should work.
On Apr 22, 2009, at 10:26 AM, ANJAN PURKAYASTHA wrote:
I have a data matrix:
repeat1 repeat2
1 30 34
2 12 23
3 50 13
4 56 98
.
.
.
I would like to plot for the mean and standard error of mean of
repeat 1 and
repeat2 for each row.
Any pointers on how to do this in R?
TIA,
Anjan
--
=============================
anjan purkayastha, phd
bioinformatics analyst
whitehead institute for biomedical research
David Winsemius, MD Heritage Laboratories West Hartford, CT
I realized after looking again that you asked for plotting. Since you
only have two points per row, it would be more honest statistically to
plot the values rather than mean and sem.
> dm <-read.table(textConnection(" repeat1 repeat2
+ 1 30 34
+ 2 12 23
+ 3 50 13
+ 4 56 98"), header=TRUE)
> plot(x=1:nrow(dm), y=dm$repeat1, ylim=c(min(dm), max(dm)) )
> points(x=1:nrow(dm), y=dm$repeat2)
On Apr 22, 2009, at 10:26 AM, ANJAN PURKAYASTHA wrote:
I have a data matrix:
repeat1 repeat2
1 30 34
2 12 23
3 50 13
4 56 98
.
I would like to plot for the mean and standard error of mean of
repeat 1 and
repeat2 for each row.
Any pointers on how to do this in R?
TIA,
Anjan
--
=============================
anjan purkayastha, phd
bioinformatics analyst
whitehead institute for biomedical research
David Winsemius, MD Heritage Laboratories West Hartford, CT