Hi,
Using Rcpp through inline.
I want to return a matrix, but I don't know the size beforehand. (My code
loops through a large data set accumulating certain statistics.)
With a NumericVector, I can use push_back() to just add values to the end of
the vector as they occur. Is there similar functionality for a NumericMatrix?
Alternately, I could store all my generated statistics in several vectors (6-7)
and then, when complete with my loop, glue them together into a matrix. But,
this seems inefficient.
Here is a rough example of what I'm trying to do.
------------------------------
int n = inputData.size();
Rcpp::NumericMatrix output;
for(int i=0; i != n; i++){
// generate some stats with a lot of code not shown
foo = mean(stuff);
bar = min(stuff);
baz = max(stuff);
// etc...
output.push_back(foo, bar, baz);
)
return output;
-------------------------------
--
Noah Silverman
UCLA Department of Statistics
8117 Math Sciences Building #8208
Los Angeles, CA 90095
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