Displaying 5 results from an estimated 5 matches for "isplit".
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2004 Jun 17
2
using "= matrix (...)" in .C calls
...sord),
as.integer(max(cats)),
as.integer(xval),
which = integer(nobs),
cptable = matrix(double(numcp*cpcol), nrow=cpcol),
dsplit = matrix(double(1), nsplit,3),
isplit = matrix(integer(1), nsplit,3),
csplit = catmat,
dnode = matrix(double(1), nodes, 3+numresp),
inode = matrix(integer(1), nodes, 6),
PACKAGE = "rpart")
Which in communicates with the C code...
2009 Aug 07
2
create separate plots by factors
Hello,
I am attempting to create several plots based on "site" (~300 total)
and am having trouble with the code. I simply want to create a plot
using the code, plot(year, peak), for the following dataset. I would
like for each site to be plotted on a separate page and the plots
saved in a directory. Would a "foreach" loop work? I tried a "by"
statement, but
2002 Apr 25
1
understanding and resolving seg faults
...s for your help,
For those that don't have structure of rpart drilled into their brain:
deltaI is declared in "rpmatrix.c":
void rpmatrix(struct node *me, Sint *nodecount, Sint *splitcount,
Sint *catcount, Sint *numcat, double **dsplit,
Sint **isplit, Sint **csplit, double **dnode,
Sint **inode, double **deltaI, int id)
rpmatrix is called by "s_to_rp.c" where
ddeltaI is a pointer from an ALLOC call:
void s_to_rp2(Sint *n, Sint *nsplit, Sint *nnode, Sint *ncat,
Sint *numca...
2009 Sep 02
4
Grouping data in a data frame: is there an efficient way to do it?
I have a data frame with about 10^6 rows; I want to group the data
according to entries in one of the columns and do something with it.
For instance, suppose I want to count up the number of elements in
each group. I tried something like aggregate(my.df$my.field,
list(my.df$my.field), length) but it seems to be very slow. Likewise,
the split() function was slow (I killed it before it completed).
2009 Sep 02
0
Revolutions blog: August roundup
....
http://bit.ly/15NgOl linked to an R analysis of fish imports/exports.
http://bit.ly/ZNXch accounted the formation of a DC-area user group,
and called for speakers for the inaugural meeting in October.
http://bit.ly/15uBrK gave an example of parallel-processing a data
frame in blocks with "isplit" from the iterators package.
http://bit.ly/HaRcg linked to two upcoming R courses on graphics and
data mining.
http://bit.ly/uOMGq noted some highlights of the "fortunes" package.
http://bit.ly/X1Ee4 revealed that the tech industry analysts
TechCrunch now use R to produce their re...