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mysam
2010 Nov 25
3
How to "bin"/average" time points?
Dear all,
I am pretty new to R only having an introduction course, so please bare with
me. I am doing my PhD at The Max Planck Institute of Immunobiology where I
am analyzing some calorimetry data from some mice.
I have a spreadsheet consisting of measurements of the respiratory exchange
rate at different time points measured every 9 minutes over some days.
My goal is "bin"/average the
2007 Mar 02
2
sampling random groups with all observations in the group
Hi
I have a panel dataset with large number of groups and differing number
of observations for each group. I want to randomly select say, 20% of
the groups or 200 groups, but along with all observations from the
selcted groups (with the corresponding data).
I guess it is possible to generate a random sample from the groups ids
and then match that with the entire dataset to have the intended
2011 Jan 09
1
Operating on count lists of non-equal lengths
This is my first post to R-help and I look forward receiving some
advice for a novice like me...
I?ve got a simple repeated (4 periods so far) 10-question survey data
that is very easy to work on Excel. However, I?d like to move the
compilation to R but I?m having some trouble operating on count list
data in a neat way.
The data C
> str(C)
'data.frame': 551 obs. of 13