similar to: Can this be vectorized?

Displaying 20 results from an estimated 4000 matches similar to: "Can this be vectorized?"

2000 Dec 18
0
Rwinst.exe 1.2.0 problems
I just downloaded the binaries for the released 1.2.0 for Windows (from Guido Masarotti's site). In using the rwinst.exe installer, I noted two significant problems. First, the installer seems extraordinarily slow compared to the the 1.1.1 installer. It took almost 20 minutes to perform a full base extraction from binaries to installation (all base pages, html help, windows help, pdf
2000 Sep 12
0
Alternative to Notepad
My earlier message was not as clear as it could have been. I already have Emacs for my NT system, but prefer not to use it or vi. It is really a case of not needing a sledgehammer to swat a gnat. The advantage of EditPadPro (for me anyway) is that it has a footprint of 1MB including helpfiles, whereas the versions of Emacs I've seen for NT require about 30MB of disk space to store.
2000 Sep 13
0
Cleaning up part 2.
Thanks to those who suggested I use make clean. I *had* done that before asking the question, but it would never run. I kept getting: nothing to make. After getting a couple of replies suggesting "make clean" again, I blew away the entire directory, reinstalled the sources, reset the paths, and first did a normal "make". Then I followed that with "make
2001 Mar 16
0
boot() vs S-Plus bootstrap()
I'm trying to adapt some S-Plus scripts to run in R (1.2.2, Windows). In one of these scripts, I've bootstrapped the prediction success rate under the discriminant function (lda). The bootstrap() functions are proprietary to S-Plus and there aren't exact equivalents in R. The closest is Canty's library boot based on the Davidson and Hinkley book. Unfortunately, I
2001 Sep 14
0
rpart or Postscript problem?
I've run into another postscript/rpart problem unrelated to the issues I've mentioned in a previous query. I'm using 1.3.1 on a Win2K box. >plotcp(some.rpart.object) draws a very nice plot on the windows graphic device. If I save this as a postscript file, either by opening a postscript device before calling plotcp, or by saving the graphics window as a postscript file, the
2001 Jul 12
2
rpart puzzle
I've been using the package rpart with R 1.3.0 for Windows to produce simple classification trees for some measurement data from paleontological specimens. Both the rpart documentation and the output confirm that the program produces splits on continuous data that leave "holes" in the data. It is probably of little practical importance, but is there a reason why the binary
2000 Aug 01
1
Testing for parallel slopes
I'm running a series of simple bivariate linear regressions on grouped data. I want to test the slopes to see if they are parallel. I normally use analysis of covariance to do so, looking at interaction between the covariate and the factor to make this determination. VR3 pp.149 - 154 has a very nice example of an ANOCOVA, ending with a discussion of this very operation. My question has
2001 Feb 26
1
Difference between S-Plus & R 1.2.1
Sorry for the uninformative subject. The following piece of code gives different output in S-Plus (2K & 6) vs R 1.2.1 (Win) apply(apehum[,6:15], 2, function(x) which(is.na(x))) S-Plus results: > apply(apehum[,6:15], 2, function(x) which(is.na(x))) $latsupri: numeric(0) $medepico: numeric(0) $pdhtcapi: numeric(0) $mlhtcapi: numeric(0) $aphttroc: [1] 151 152 $mlhttroc: numeric(0)
2001 Apr 02
2
Is it possible to...
I have a matrix (1000 x 224) that contains the output from the function boot.array. For each row, there are 224 columns that represent the case numbers of the selected individuals from a bootstrap. The cases are listed in selection order, not numerical order. I'd like to rearrange the cells so that every row has the column entries listed ascending numeric order. I've been able to
2001 Mar 13
1
kmeans cluster stability
I'm doing kmeans partitioning on a small (n=26) dataset that has 5 variables. I noticed that if I repeatedly run the same command, the cluster centers change and the cluster membership changes. Using RW1022 under Windows NT & Windows 2000 >kmeans(pottery[,1:5], 4, 20) [...snip] $size [1] 7 3 9 7 [...snip] $size [1] 7 10 4 5 [...snip] $size [1] 6 10 5 5 yields a different
2000 Dec 21
2
Legends on plots
I'm trying to develop a systematic way of placing legends on (among other things) scatterplots of grouped data. The journals in my field can be very fussy about the placement of figure legends. Typically they want them to be in either of two places - the upper left corner of the plotting area, not obscuring any data points, or outside the plotting area in the lower right hand corner of
2002 Jan 23
1
?Corrupt Recommended packages source
I'm not really sure this is the place to raise this, but here goes anyway. I've downloaded the 1.4.0 recommended package sources R-1.4.0-recommended.tgz multiple times from the main CRAN site. The sources have arrived corrupted each time (from multiple computers BTW). If I download the same file from the UCLA or University of Bristol mirror, I also get corrupt archive files. On the
2000 Sep 13
2
Cleaning up after compiling R source
Forgive this naive question, but I'm not accustomed to using Win ports of Unix tools (actually I'm unfamiliar with Unix tools, period). Anyway, I've successfully compiled the R-1.1.1 sources into the full binary package. Everything seems to work. I'd like to remove all the "made" files and leave only the original source code and the compiled binary code. Is there
2001 Oct 03
1
R != S-Plus
David Brahm's initial post seems to me to be filled with a mixture of bugs, wants, and needs coupled with a desire to "make" R become S-Plus. David, if S-Plus works for you, why are you bothering to convert all your code to R? No one has ever asserted that R==S (or S-Plus), and there is no reason to expect this equality to hold, ever. R is open source. If you want to change
2001 Feb 07
1
Summary: Removing "row.names"
Thanks to all who offered suggestions for my question of how to "remove" row.names. As Bill Venables patiently pointed out, row.names are part of the object-oriented design of the S language (all dialects). As a result, there is no way to "literally" remove row.names and still have a data.frame. This was a useful thing to have Bill point out. In fact, my problem was
2000 Dec 18
1
Rwinst.exe problems
I've heard from several users who report no difficulties using the Rwinst.exe installer for the released version of 1.2.0. I've blown away all traces of 1.2.0 on my system and have re-downloaded all 10 zip files and the installer on both my NT and Win2K boxes. The memory-overwrite error persists on both systems, suggesting that there is some incompatibility between the 1.2.0
2002 Jul 03
2
"Best" Out of box Linux distro for R
At the risk of starting a holy war, I'd like opinions on the "best" current Linux distribution to run "out of box" with current versions of R. I note rpms for various versions of RedHat, SUSE, Mandrake, and Debian. I've had experience with RH 7.1 & 7.2 and it hasn't been entirely pretty. I understand that 7.3 is a bit "better", but have also
2002 Jul 12
2
Crosstabs in R
Before I reinvent the wheel, I have need for a relatively straightforward crosstabulation (2 x n) function. I know that R has table(), ftable(), xtabs(), and summary(xtabs()), but none of these produce a fully "tricked" out cross-tabulation with marginal totals, expected cell frequencies, and an array of statistics about the contingency table. Is there a more complete (something
2001 Jul 27
2
boxplot question
I'm graphing a series of boxplots of grouped data inside a function that passes the data.frame, the names vector, and a title vector. Because both the data subset changes with each successive pass through the function, occasionally the names vector turns up with only one group to plot. This is an expected result. However, when the names argument in boxplot has only a single name, it
2001 Jul 25
1
Floating point "fuzz" and rpart?
I've been using rpart with R (1.3.0 Windows) for some time. I recently ran one of my research data sets through the rpart routine and produced a classification tree. I tried to replicate the results of the rpart analysis on another machine of mine and discovered some startling differences in the results. Puzzled, I went back to the raw data residing on both machines. I printed out