Displaying 6 results from an estimated 6 matches similar to: "(no subject)"
2010 Jul 10
4
eliminating constant variables
Hi all,
I have a large data set and want to immediately build a 'blind' model
without first examining the data. Now it appears in the data there are a lot
of fields that are constant or all missing values - which prevents the model
from being built.
Can someone point me the right direction as to how I can automatically purge
my data file of these useless fields.
Thanks in advance,
pdb
2001 Feb 20
0
dyn.load() and dyn.unload() under Windows
Hello:
I am having some difficulty with a DLL, using
> version
_
platform i386-pc-mingw32
arch x86
os Win32
system x86, Win32
status
major 1
minor 2.1
year 2001
month 01
day 15
language R
I have a library called
2005 Dec 15
1
millions of comparisons, speed wanted
Dear all,
I have a 10 columns matrix which has 2^10=1024 unique rows, with values 0 and
1.
What I would like to do is a little complicated; in a simple statement, for a
subset (say 1000 rows) I want to perform pairwise comparisons between all
rows, find out which rows differ by only one value, replace that value by
"x", get rid of the comparisons that differ by more than one value
2008 Jan 25
1
increasing speed for permutations of glm
Dear R Programmers,
I am trying to run a Poisson regression on all pairs of variables in a data
set and
obtain the permutation distribution. The number of pairs is around 100000.
It seems my code will take weeks to run, unless I try something else.
Could you give me any suggestions on how to improve the speed of the
code below, or any general suggestions on how I may accomplish this task.
Thanks
2017 Jul 17
0
dbplyr error updating database
I am trying to use a shiny app to update records in an sqlite database. I keep running into the following error:
unable to find an inherited method for function 'dbSendQuery' for signature '"src_dbi", "character"'
The query I am trying to send is:
[1] "update kpquestions set mrisupercat = 'Demographics - Respondent' , set mricategory =
2006 Jul 17
1
Getting rid of for loops
Hello R-users!
I have a style question. I know that for loops are somewhat frowned upon in
R, and I was trying to figure out a nice way to do something without using
loops, but figured that i could get it done quickly using them. I am now
looking to see what kind of tricks I can use to make this code a bit more
aesthetically appealing to other R users (and learn something about R along
the