Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise? Thank you. Francisco J. Molina
Detect the presence of an object
8 messages · Francisco J Molina, Marc Schwartz, Jeff Gentry +5 more
On Fri, 2004-01-30 at 14:58, Francisco J Molina wrote:
Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise? Thank you. Francisco J. Molina
See ?exists This requires that the object of interest is quoted:
a <- "I am here" exists(a)
[1] FALSE
exists("a")
[1] TRUE There are other arguments to the function to indicate where to search, etc. HTH, Marc Schwartz
Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise?
exists()
try the function exists()
On Fri, 30 Jan 2004, Francisco J Molina wrote:
Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise? Thank you. Francisco J. Molina
______________________________________________ R-help at stat.math.ethz.ch mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Paulo Justiniano Ribeiro Jr Departamento de Estat?stica Universidade Federal do Paran? Caixa Postal 19.081 CEP 81.531-990 Curitiba, PR - Brasil Tel: (+55) 41 361 3471 Fax: (+55) 41 361 3141 e-mail: pj at est.ufpr.br http://www.est.ufpr.br/~paulojus
Have you considered "exists" or "missing"?
hope this helps. spencer graves
Francisco J Molina wrote:
Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise? Thank you. Francisco J. Molina
______________________________________________ R-help at stat.math.ethz.ch mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
Francisco J Molina wrote:
Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise?
?exists
Chuck Cleland, Ph.D. NDRI, Inc. 71 West 23rd Street, 8th floor New York, NY 10010 tel: (212) 845-4495 (Tu, Th) tel: (732) 452-1424 (M, W, F) fax: (917) 438-0894
On 30 Jan 2004 at 12:58, Francisco J Molina wrote:
Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise?
Have you tried exists("a", inherits=FALSE) ?
- Torsten
Francisco J Molina <fjmolina at ams.ucsc.edu> writes:
Is there a function like "is.there" such that is.there ( a ) returns TRUE is object 'a' is in the current environment and FALSE otherwise?
exists("a",inherits=FALSE)
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907