[R] Geometric Brownian Process
Dear R People, Consider I have 3 realizations of an Geometric Brownian process. Now i want to overlay the plot of these realizations. In a future point in time a probability density curve in this specific point of time should overlay this plot ( view rotated 90°). I am sorry for not providing any source code. Can anybody point mo to an package, or has anybody an idea how to simulate an geometric brownian process in R? Thanks in advance, Michael Graber __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
[R] Creating a table
Dear R List,
I am a new to R, so my question may be easy to answer for you:
I have a dataframe, for example:
df<-data.frame(loc=c("A","B","A","A","A"),
year=as.numeric(c("1970","1970","1970","1976","1980")))
and I want to create the following table without using loops:
1970-74 ; 1975-79 ; 1980-85; rowsum
A 2 1 1 4
B 1 00 1
colsum 31 15
so that the frequencies of df$loc are shown in the table for different
time intervals.
Thanks in advance for any hint,
Michael Graber
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and provide commented, minimal, self-contained, reproducible code.
Re: [R] R and ViM
dear all, to close the open question i asked more than a month ago, i would like to tell you my conclusions: exchanging emails with larry clapp who wrote funnel.pl, i found out that the tasks i wanted to be done by funnel.pl could actually, and much more, also be done by gnuscreen (http://www.gnu.org/software/screen/), which is a 'a full-screen window manager that multiplexes a physical terminal between several processes'. quite interesting thing. anyway. what i'm doing now to use vim with r is, to open a screen session with r and vim running within it: %screen R starts screen with R in it. then i open another window with 'ctrl-a c'. 'ctrl-a' start screen internal commands. in this new shell i can start vim normally to edit my .r-file. to change windows i use 'ctrl-a space'. now i can split the window with 'ctrl-a S'. to jump between the splitted halfs you can use 'ctrl-a tab'. i normally resize the r window with 'ctrl-a :resize 8', to make 8 lines high. to send text from one window to another i put into my .screenrc - file: bind y at R# paste . this makes it possible to use 'ctrl-a y' to send your buffer to the R window. to get something into your buffer you make use of the screen copy mode 'ctrl-a [' starts the copy mode. now you can start copying by pressing 'space', move the cursor and then pressing 'space' again. if you want to cut off the line numbers you can press 'v' before pressing 'space' the second time. now you can send the buffer as i told above. this works pretty well so far! what i would like to improve further is, to be able to copy whole lines and blocks with simple commands, maybe with sending it to r directly. any ideas? best, michael On Apr 19, 2006, at 8:42 AM, Martin Maechler wrote: >> "PD" == Peter Dalgaard <[EMAIL PROTECTED]> >> on 19 Apr 2006 01:06:02 +0200 writes: > > PD> "Jose Quesada" <[EMAIL PROTECTED]> writes: >>> Hmm, how timely. >>> >>> I posted yesterday my solution to integrate R and >>> vim. The message is in my sent box but I don't think it >>> showed up in the list... Here it is again: >>> >>> Hi All, >>> >>> If you use vim to edit R code, you may be interested in >>> this. I have put together a personalized syntax file, >>> some code templates, and a way to send code from Vim to R >>> using autoHotKeys (windows). >>> >>> http://www.andrew.cmu.edu/user/jquesada/RvimSuite/instructions.html >>> >>> Actually, the little autoHotKeys can be useful even if >>> you don't use vim just to send the example R code from >>> the help pages to the console. >>> >>> Best wishes, -Jose >>> >>> PS: @list moderators Any idea why my message (from a >>> @gmail account) appeared in the sent box but never on the >>> list? > > PD> I saw it the first time... Could it be that your mail > PD> reader is set up to ignore mail from yourself? > > PD> Rather than resending stuff, it is preferable to check > PD> the archives > > PD> https://stat.ethz.ch/pipermail/r-help/2006-April/date.html > PD> https://stat.ethz.ch/pipermail/r-help/2006-April/092457.html > > PD> which are easily reachable via > R-help@stat.math.ethz.ch mailing list > >>> https://stat.ethz.ch/mailman/listinfo/r-help > > Indeed. Please do check the archives. > > Now back to the subject: Jose, I think your main contribution > is based on "autoHotKeys" and that only works on Windoze, right? > Michael explicitly mentioned he's working in Mac OS X. > > Martin > __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] boxplots instead of a scatterplot
Dear R list, I am a newbie to R and programming itself, so my question may be easy to answer for you. I wanted to create a scatterplot and i used the following code: par(mar=c(10, 4.1,4.1,2.1)) plot(q$location,q$points, , las=2, cex.axis=0.5,xlab="", ylab="" ) #location are character strings, there are about 70 locations #points are numeric, there are more than 4 points for every location my problem is that this code does not create a simple scatterplot with location on the x axis and points on the y axis. Instead of this i get "vertical boxplots" for every location. Thanks for any hint, Michael Graber __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] R and ViM
Dear all, I'm starting to learn R, but I'm already programing for a while, using ViM as editor. Therefore I'd like to be able to use R together with ViM. My question now is, whether there are already people out there knowing how to do this in a similar easy way as with Emacs, and if those would be willing to share this knowledge. I did already research on the web on this topic, but i couldn't find satisfying answers, except one good looking approach on the ViM-website with a perl-script called funnel.pl, which I couldn't make running on my mac OSX 10.3.9 so far. I'd be grateful for help. Thanks, Michael Graber __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] y-axis in histograms
Dear R- list, I have some data to present with histograms. Therefore I used hist(...). I have few values with almost 80% of the frequencies (totaly 800) and some other values with low frequencies ( totaly 5 -10 ) that I want to emphasize. Therefore I want to "cut" the y-axis on 100, but I don't know how to deal with this. Thanks in advance, Michael Graber __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] data.frame-question
Dear R-List, I am very new to R and programming itself, so my question may be easy to answer for you. I tried a lot and read through the manuals, but I still have the following problem: I have 2 data-frames: Number<-as.numeric (Number) Name<-as.character (Name) TAB1<-data.frame (Name,Number) - it looks like this:- Name Number A 2 A 3 A 6 B 8 B 12 B 7 C 8 D 90 E 12 E 45 … Name_singular<-as.character (Name_singular) TAB2<-data.frame (Name_singular) # it looks like this: Name_singular A B C D E -My result should be a data-frame, where the first column is Name_singular and the second column should be the sum of the numbers where Name ==Name_singular.- For example: TAB3: Name_singular Sum A 11 B 27 … - I tried it with for-loops, but I think there must be an easier way.- I would be very grateful for your help, Michael Graber __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] How to delete rows
Dear R-users,
I am very new to R, so maybe my question is very easy to answer.
I have the following table:
TAB1<-data.frame(Name,Number), "Name" and "Number" are all character
strings,
it looks like this:
Name Number
ab 2
ab 2
NA 15
NA 15
NA 15
cd 3
ef 1
NA 15
NA 15
gh 15
gh 15
I want to delete all the rows which begin with "NA"
and all the rows where names are duplicates
(for example the second row).
I have tried this, but I only get numbers:
for (i in 1:ZeileMax ) {if ( TAB1[[1]] [i] != "NA" )
{cat(TAB1[[1]][i],file = "Name.txt",fill= TRUE,append = TRUE ,sep =
"");cat(TAB1[[2]][i], file="Number.txt", fill=TRUE,append=TRUE, sep="")}}
Name<-readLines("Name.txt")
Number<-readLines("Number.txt")
TAB<-data.frame(Name,Number)
Thanks in advance,
Michael Graber
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[R] converting an ASCII file to a matrix
Dear R-WinEdit users, I have a simple question, but somehow I cannot find the answer even though I tried a lot! I have an unstructured ASCII-file and I want to import it into a matrix m in R, so that every character is defined by m[i;j]. The rows are not of the same length. The file looks like the following shortened abstract example: name: x age: 9.9.99 record number: 999 title: x xxx keywords: xxx xx "white space" name: age: 8.8.88 record number: 8 title: yy keywords: yyy yyy "white space" The result should be for example: m[1;1]=n I would be very grateful for your help! Michael Graber [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] converting an ASCII file to a matrix
Dear R-WinEdit users, I got a simple question, but somehow I cannot find the answer, although I have tried a lot! I got an ASCII-file and I want to import it into R, so that every character is defined by [i;j]. The rows are not of the same length. the file looks like the following shortened abstract example: name: x age: 9.9.99 record number: 999 title: x xxx keywords: xxx xx "white space" name: age: 8.8.88 record number: 8 title: yy keywords: yyy yyy "white space" I would be very grateful for your help! Michael Graber [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
