[R] baseline shift / detrend

[Peter Soros]

Hello,

I am analyzing data of biological motion (mouth movements) over time (~ 
10 mins). There is a considerable baseline shift which appears to be a 
linear trend. Is it possible to get rid of this baseline shift using R?
Any help is appreciated!
Peter

Dr. Peter Soros
Sunnybrook and Women's College Health Sciences Centre
2075 Bayview Avenue Room S646
Toronto,âZ Ontario,âZ M4N 3M5
Canada

psoros at sten.sunnybrook.utoronto.ca