[R] Merge two dataframes of different column length and row length by two columns at a time

by V1 and V2 of a and b. The combination of V1, V2 is a unique key. Note that b is smaller than a. Any suggestions to solve this problem ? Gunther Höning Diplom Physiker Bioinformatiker Langenbeckstraße1 55131 Mainz [EMAIL PROTECTED] __ R-help

[R] Calculate x-values from a spline

Hello, I calculate splines from messured points(x,y) of an unknown function f(x). e.g. x - c(0.004115, 0.012345, 0.037037, 0.10, 0.30, 1.00) y - c(37, 50, 45, 60, 50, 66) w - c(0.8540541, 0.832, 0.882, 0.798, 0.822, 0.8151515) as weights f - smooth.spline(x,y,w) Now I

[R] AffyChip Background Analysis

Dear list, I want to analyse some HG133Plus2.0 Affymetrix chips. The first thing I intent to do, is just to perform a background correction (mas, rma, gcrma,...) with the cel files. Then I want to take a look at the files. How can I do this ? Gunther

[R] Question on AffyBatch

Dear list, I'm trying to find out the following in an AffyBatch. To get the indices from a loction on a chip I use the function xy2i() for the hgu133plus2 by Affymetrix. But now I want to know the name of the probe located at this spot. How can this be done? And what about the locations used as

[R] Question on apply()

Dear list, I try to do the following: I have an list of length n, with elements done by smooth.spline (SmoothList). Now I have a matrix with n rows and m columns with x-values(Xarray) Now I want ot predict the y-values. Therefor I want to take the first element of SmoothList and the first row

Re: [R] Question on apply() with more information...

:[EMAIL PROTECTED] Gesendet: Montag, 18. September 2006 08:43 An: Gunther Höning; r-help@stat.math.ethz.ch Betreff: Re: [R] Question on apply() Hi not much information about what can be wrong. As nobody knows your Xarray and SmoothList it is hard to guess. You even omitted to show what does not work So

Re: [R] Question on apply() with more information...

than just to predict a value, but it isn't important for the initial question... Gunther -Ursprüngliche Nachricht- Von: Petr Pikal [mailto:[EMAIL PROTECTED] Gesendet: Montag, 18. September 2006 11:44 An: Gunther Höning Cc: r-help@stat.math.ethz.ch Betreff: Re: AW: [R] Question on apply

[R] Accessing C- source code of R

Dear list, I'm looking for the sources code of parts of R, (e.g. spline). Does anyone know where I can access it ? Gunther __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide

Re: [R] Accessing C- source code of R

That's exactly what I was looking for... Thanks! Gunther -Ursprüngliche Nachricht- Von: Uwe Ligges [mailto:[EMAIL PROTECTED] Gesendet: Dienstag, 26. September 2006 10:13 An: Gunther Höning Cc: r-help@stat.math.ethz.ch Betreff: Re: [R] Accessing C- source code of R Gunther Höning

[R] 3 dimensional histogram

Dear list, I want to plot a 3 dimensional histogram and I am looking for a funktion to do so. I have a dataframe with the following information: 1 0.50 -0.5 -1 a 13 11 6 2 1 b 9 8 6 5 3 c 5 4

[R] Sorting dataframe by different columns

Dear list, I have a very short question, Suggest a dataframe of four columns. df - data.frame(w,x,y,z) I want this ordered the following way: first by :x, decreasing = FALSE and secondly by: z, decreasing =TRUE How can this be done ? Thanks Gunther