Re: [R] Converting factors to numeric in a dataframe

Hi petr, Thanks for the reply. My original data is in comma separated variable (csv) format with variable names in column 1 and numeric data in the remaining columns. The read.csv command reads this data set into object name pcrdata as a dataframe where the variable names and numeric data are

Re: [R] Converting factors to numeric in a dataframe

Hi Michael r-help-boun...@r-project.org napsal dne 18.03.2010 12:02:19: Hi petr, Thanks for the reply. My original data is in comma separated variable (csv) format with variable names in column 1 and numeric data in the remaining columns. The read.csv command reads this data set into

Re: [R] Converting factors to numeric in a dataframe

Hi as you did not provide data it is hard to say what is wrong. You can see that it is working on dates similar what you described. test - data.frame(x=letters[1:10], y=rnorm(10), z=runif(10)) test x y z 1 a 0.09980806 0.32211567 2 b 0.70559139 0.32204076 3 c

[R] Converting factors to numeric in a dataframe

I am currently trying to write a program that minimises the amount of work required for “auditable” qPCR data. At the moment I am using an Excel (.csv) spreadsheet as source data that has been transposed to the column format required for R to read. Unfortunately, this means I have* *to manually

Re: [R] Converting factors to numeric in a dataframe

Hi! I don't really understand why you do pcrdata-as.data.frame(t(pcrdata)) Do you need to transpose the dataset? Because read.csv() creates a dataframe already. Something I found really useful recently is the package xlsReadWrite where the function read.xls() has an argument colClasses

Re: [R] Converting factors to numeric in a dataframe

Why use a csv dataset as an intermediary? Use RExcel and get the dataset directly from your Excel source. See http://rcom.univie.ac.at for full details. You can download the RExcelInstaller package from CRAN with install.packages(RExcelInstaller) library(RExcelInstaller) installRExcel() Rich