Question

Setting:
I have (simple) .csv and .dat files created from laboratory devices and other programs storing information on measurements or calculations. I have found this for other languages but nor for R

Problem:
Using R, I am trying to extract values to quickly display results w/o opening the created files. Hereby I have two typical settings:

a) I need to read a priori unknown values after known key words
b) I need to read lines after known key words or lines

I can’t make functions such as scan() and grep() work.

c) Finally I would like to loop over dozens of files in a folder and give me a summary (to make the picture complete: I will manage this part)

I woul appreciate any form of help.

Answer 1

ok, it works for the key value (although perhaps not very nice)

 variable<-scan("file.csv", what=character(),sep="")

returns a charactor vector of everything

 variable[grep("keyword", ks)+2]     # + 2 as the actual value is stored two places ahead

returns characters of seaked values.

 as.numeric(lapply(variable, gsub, patt=",", replace="."))

for completion: data had to be altered to number and “,” and “.” problem needed to be solved.

in a line:
data=as.numeric(lapply(ks[grep(“Ks_Boden”, ks)+2], gsub, patt=”,”, replace=”.”))

Perseverence is not to bad of an asset 😉

The rest isn’t finished, yet, I will post once finished.