I would like to evaluate cbind(S$GCS,S$Vent) from the character string
"S$GCS,S$Vent", where S is a data frame, and GCS and Vent are column names.
One of my many attempts has been to try
eval(call("cbind",as.name("S$GCS,S$Vent"))), but this gives the error message
Error: Object "S$GCS,S$Vent1" not found
What is the correct way of attempting this task?
Thanking you in advance
Richard
-------------------------------
Richard Dybowski PhD
Research Fellow (Knowledge & Data Engineering)
King's College London
Medical Informatics Laboratory (Department of Medicine)
4th Floor
North Wing
St Thomas' Hospital
Lambeth Palace Road
London SE1 7EH
UK
Tel (office): (0)20 7928 9292 extension 6429
Tel (mobile): 0976 250092
Fax: +44 (0)20 7928 4458
E-mail: richard.dybowski@kcl.ac.uk
Web site: http://www.umds.ac.uk/microbio/richard/richard.htm
{Note: Currently using e-mail address richard@n-space.co.uk whilst link to
Internet is being established in my new office at St Thomas' Hospital}
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