Displaying 4 results from an estimated 4 matches for "mkarol".
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karol
2011 Aug 02
2
Help with aggregate syntax for a multi-column function please.
Dear R-experts:
I am using a function called AUC whose arguments are data, time, id, and
dv.
data is the name of the dataframe,
time is the independent variable column name,
id is the subject id and
dv is the dependent variable.
The function computes area under the curve by trapezoidal rule, for each
subject id.
I would like to embed this in aggregate to further subset by each
2011 Sep 27
2
Equivalent to regMatchPos in R.
R Experts:
I am trying to isolate the numeric value of day from a string that might
look like "Cycle 1 Day 8" or "Cycle 12 Day 15".
In essence, what I need is a function that can look at a character
string and tell me the location within the string where it matches with
a given string. In this case, where within "Cycle 12 Day 15" is the
text "Day"
2011 Jun 17
1
graphsheet and export.graph equivalents in R?
R Experts
I'm currently using an S+ script of the following format and would
like to convert it to R. The script opens a graphsheet with an
associated name, plots something (in this case a boxplot) and then
exports the contents of the graphsheet of the assigned name to an EMF
file. I've been looking for something in R that would work the same way
but to no avail.
Could someone
2012 Feb 23
2
Aggregate with Function List ?
R Experts
I wish to tabulate into one data frame statistics summarizing
concentration data. The summary is to include mean, standard
deviation, median, min and max. I wish to have summaries by Dose, Day
and Time. I can do this by calling aggregate once for each of the
statistics (mean, standard deviation, median, min and max) and then
execute 4 merges to merging the 5 data frames into