Displaying 2 results from an estimated 2 matches for "trimester".
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trieste
2012 Jan 30
2
handling a lot of data
...the
best approach to work with big data files? Can R get a value from the file
data without full loading into memory? How can a slower computer with not
enough memory work with such data?
I use the following commands:
data1993 = vector("list", 4);
data1993[[1]] = read.spss(...) # first trimester
data1993[[2]] = read.spss(...) # second trimester
...
data_all = vector("list", 17);
data_all[[1993]] = data1993;
...
and indexing, e.g.: data_all[[1993]][[1]]$DISTRICT, etc.
Thanks,
Petr Kurtin
2010 Mar 25
0
help with breaking loops used to fit covariates in nlme model building procedure
...:length(vec[[1]]), function(vec) vector("list",6)) # maximum 6 levels to variable
vec
for (p in 1) { # p is 1 only because for now I'm looking at the first tier only
for (b in c(1,2,3,4)) { #parameters
for (j in 1:length(m0sulf[,c("preg","trimester","site")]) ) {
#2 levels, 3 levels and 6 levels respectively, so have all types of covariates covered-for my dataset
k=(m0sulf[,c("preg","trimester","site")][[j]])
y=nlevels(k)
m=abs(y)
my...