similar to: fitting logit to data

Displaying 20 results from an estimated 2000 matches similar to: "fitting logit to data"

2010 Aug 27
3
predict.loess and NA/NaN values
Hi! In a current project, I am fitting loess models to subsets of data in order to use the loess predicitons for normalization (similar to what is done in many microarray analyses). While working on this I ran into a problem when I tried to predict from the loess models and the data contained NAs or NaNs. I tracked down the problem to the fact that predict.loess will not return a value at all
2011 Apr 13
5
Clearing Console; of weeks of codes!
Dear All: I do see I have weeks of codes in my console when I check with my arrow up keys. I have been clearing them with Control L but it seems to clear it clear the screen temporally. I do see the previous codes again when I open R the next day, after quitting the session! Q: How do I clear this? Thanks; YA -- View this message in context:
2011 Mar 08
4
beamer overlays with Sweave?
This may be asking too much, but I'm wondering if anyone has a solution (even a hack) for creating multiple (overlay) plots in an Sweave file and post-processing the overlays in beamer appropriately. For example, suppose I have a series of figure blocks in my .Rnw file: <<plot1,fig=TRUE>>= [stuff] @ <<plot2,fig=TRUE>>= [stuff] @ <<plot3,fig=TRUE>>=
2010 Aug 05
6
64-bit R on 64-bit Windows box... Still not enough memory?!
I have a 64-bit windows box - Intel Xeon CPU E7340 @ 2.4GHz 31.9GB of RAM I have R 2.11.1 (64bit) running on it. My csv data is 3.6 GB (with about 15 million obs, 120 variables.) ------------------------------------------------ I have successfully imported the data above into R. No problem. Now I am trying to run 'rpart' on my data. But I got the following error : Error: cannot
2011 Apr 08
3
xyplot, groups and colors
Dear ExpeRts, I am trying to plot a bunch of growth curves and would like to get some more control over groups and line colors than I seem to have. Example: # make some data dat <- Orange dat$group <- ifelse(dat$Tree%in%c('1','4','5'), 'A', 'B') # plot xyplot(circumference~age, dat, groups=group) # now use lines to make the growth curve more
2011 Apr 19
5
Simple Missing cases Function
Dear all I have written a function to perform a very simple but useful task which I do regularly. It is designed to show how many values are missing from each variable in a data.frame. In its current form it works but is slow because I have used several loops to achieve this simple task. Can anyone see a more efficient way to get the same results? Or is there existing function which does
2011 Mar 29
7
Using graphics straight from R into published articles
Hi, I have been working with R for the past couple of years; analyzing data and producing some graphics. I was just wondering if people use graphics from R straight into articles or are they always edited in some way; fonts, headers, axis, color etc? Using photoshop or some other programs? I would like to think it is possible, better and more profession to do it all in R. I tried google and
2011 Apr 27
1
read.table: fill=T for header?
Dear ExpeRts,t I am trying to read tab delimted data produced by somewhat brain dead software that seems to think it's a good idea to have an extra tab character after the last column - except for the header line. As explained in the help page, read.delim now assumes that the first column contains the row.names (which is not even wrong) but now and all col.names get shiftet by one column.
2010 Oct 15
1
Help with R
Dear Sir/Madam; I'm not sure whether this is the correct contact for help. I've been recently working with R on my project, unfortunately It sudenly crashes! It gives me the following message: "FATAL ERROR: unable to restore saved data in .RDATA" I decided to uninstall the copy (a R2.11.0) and installed a new version (2.11.1) but I'm still receiving the same message. When I
2010 Oct 23
1
Change column of numbers in data frame to days
Hello, I have seen a few posts about changing a vector of numbers to days of the week where the numbers are 1-7. I have a similar problem with a twist. I have a vector of numbers ranging form 20 to 500. The numbers represent days since a starting point. The list is not consecutive, some numbers skipped and some numbers duplicated. I know day 1 was a Monday. I want to use this vector in a lm
2010 Nov 24
4
shifting down ylab in a plot
Hi guys, I am trying to shift down the "ylab" of my plot but can't find how to do it. I tried to tune "mar" but it enable more room for the labels to be displayed but it does not move to "ylab" as I would like. Is there a way with "par" to shift down my "ylab" ?? Cheers -- View this message in context:
2011 Feb 08
2
as.Date
Hi everybody, I have a strange behavior of the as.Date() function. For example: as.Date(36525, origin="1900-01-01'") I would expect to get 2000-01-01. But R gives me [1] "2070-01-01" I tried with several origins but the results are still the same. It seems that the origin does not apply and remains 1970-01-01. Does anyone can give me a hint how to
2011 Feb 14
2
saving plots
Hi all, Is there a way to save the currently displayed plot to an image format just after we view it? I think this would be more intuitive as a user if I wish to save it just after I visualize the plot. I am aware that we need to do some thing like this jpeg('somefilename.jpg') ... plot... commands... dev.off() KM [[alternative HTML version deleted]]
2011 Feb 22
2
read.table
Hi Group, I am having a strange problem for this simple task. I am using read.table to read a plan 3 column CSV file . the file is getting read . But the first column has datetime in the csv file in the following format: 20110221.114041 But this is being read as 20110221 only . the time portion (decimal is missing) in the data frame Any idea why? Thanks, Santosh
2011 Mar 25
1
Magic Number Error Message
Hi all, When I attempt to run a script, I keep getting the error message shown below. I have seen from searching that the "Use of save versions prior to 2 is deprecated" could be an error resulting from a permissions problem, but I have been unable to find anything describing the "file has magnic number '# Coh'". The file I am attempting to read into the script is a
2011 Mar 29
3
Reversing order of vector
Dear R helpers Suppose I have a vector as vect1 = as.character(c("ABC", "XYZ", "LMN", "DEF")) > vect1 [1] "ABC" "XYZ" "LMN" "DEF" I want to reverse the order of this vector as vect2 = c("DEF", "LMN", "XYZ", "ABC") Kindly guide Regards Vincy [[alternative HTML
2011 Mar 31
1
one question about bioconductor
dear lady and gentalmen: i am gaoshan from kansas university. i used such coding to deal with gel data data <- ReadAffy() Warning messages: 1: In file(out, "wt") : cannot open file 'C:\Users\gaoshan\AppData\Local\Temp\RtmpvsyXOV\Rhttpd3f0b2e85': No such file or directory 2: In file(out, "wt") : cannot open file
2011 Apr 05
1
Saving console and graph output to same file
Hello All, How do I save the output of the R console and the graphic output to the same PDF file and append these to each other? I need to have a frequency table and a corresponding graph, one below the other in a file. I have tried with sending the cross table to the graph window using 'textplot' and then saving the graphic output. However, the table does not look nice in the graph
2011 Apr 14
1
Hash table...
To improve the efficiency of a process I am writing I would like to cache results. So I would like a data structure like a hash table. So if I call Z <- f(Y) I can cache Z associated with Y: CACHE[Y] <- Z I am stumped. I expected to be able to use a list for this but I cannot figure how.... cheers Worik [[alternative HTML version deleted]]
2011 Apr 18
4
(no subject)
Hai From which CRAN mirror can get the package ‘LPP2005REC’ Ram [[alternative HTML version deleted]]