search for: vanremortel

Hi all, Never really managed to build a for-loop with multiple running variables in an elegant way. Can anybody hint ? See below for an example of what I would like. EXAMPLE a<-c(1,2,3) b<-c("name1","name2","name3") for( number in a, name in b ) { print( number ) ##take a value print( name ) ##and have its name available from a second list } Does R

Hi all, I am faced with the situation where I want to store/analyze relatively large, organized sets of numerical data, which depend on a number of conditions (biological properties, exposure times, concentrations etc etc). Imagine about a hundred dataframes of a few thousand numerical values, with some annotation in text for some entries. Intuitively, I would like to be able to slice

Hi all, I'm fitting a linear model (using lm) to some 2500 data points. The model consists of 4 single terms and two combined terms. I get the following warning message: "Extra arguments projections are just disregarded. in: lm.fit(x, y, offset = offset, singular.ok = singular.ok, ...) " Can anybody clarify this ? I don't seem to find any pointer to what this might

Dear all, I'm trying to find a clear explanation of what the 'proj(lm)' function produces after having fit a linear model using 'lm'. I find the help page on the proj() function highly unclear (surely part to my limited knowledge of statistics). Can anybody provide a pointer to a clearer explanation, preferable containing some examples of the calculations involved ?

Hi all. I have a re-occuring typical problem that I don't know how to solve efficiently. The situation is the following: I have a number of data-sets (A,B,C,...) , consisting of an identifier (e.g. 11,12,13,...,20) and a measurement (e.g. in the range 100-120). I want to compile a large table, with all availabe identifiers in all data-sets in the rows, and a column for every