search for: plateid

Hi, I am newbie of R. I a currently using multdrc object to generate fitting curve and IC50. My 384 well format raw data contains multi dose response curves. My script goes through set of data then produce curve and ic50. Here is my sudo code: For (plateid in platelist) { Input data (plateid) as matrix Curve fitting model4logistic <- multdrc(rdata ~ ld, logDose=10) } The first 3 plates are ok, 4th plate has following error Error in mdrcOpt(opfct, startVec, optMethod, derFlag, constrained, warnVal, : Convergence failed I kno...

...to put data from each plate above platenumber<-length(platelist) for (i in 1:platenumber){ as.name(platelist[i])<-matrix() } #eventually I would like to use these matrices to read in the contents of multiple files, but using as.name hasn't worked her either. for (i in 1:fileno){ as.name(plateID[i])<-cbind(as.name(plateID[i]),read.delim(myfilenames[i], header=FALSE)) } I have been trying multiple functions to force evaluation and treat these elements as objects, and I get errors like: could not find function "as.name<-" Directly trying to create matrices doesn't work l...

...this post http://tolstoy.newcastle.edu.au/R/e6/help/09/04/11438.html#options2 and I used the suggestion provided by Jorge with modifications to my data do.call(c,lapply(your_list_with_the_t_tests,function(x) x$p.value)) but I am getting the following error after excuting the code B<-by(eo,eo$PlateID, function(.sub) t.test(mcp1~Self_T1D,data=.sub, na.rm=T)) #ttest platewise do.call(c,lapply(B, function(x) x$p.value)) Error in do.call(c, lapply(B, function(x) x$p.value)) : 'what' must be a character string or a function here "B" is equal to "your_list_with_the_t_tests...

Hello all, I have arranged my data as per Dennis's suggestion in this post http://www.mail-archive.com/r-help at r-project.org/msg107156.html. the posted code works fine but when I try to apply it to my data, i get "> u2 <- ddply(xxm, .(plateid, cytokine), as.data.frame.function(f)) Error in t.test.formula(conc ~ Self_T1D, data = df, na.rm = T) : grouping factor must have exactly 2 levels". Self_T1D has two levels "N" and "Y" I have used the ddply function to do the mean and sd for the same dataframe without a...

Hello everybody, I'm a newbie in R and just went through an introduction class recently. Here's my problem. I have 2 text files (.txt) with plain numbers ('doubles' for those who know c++) ordered into 2 columns as below: coordinate1 value1 coordinate2 value2 coordinate3 value3 ... ... coordinateN valueN I would like to write a small programme in which i would: 1. take