On Tue, 5 Apr 2005, Wladimir Eremeev wrote:
Dear r-help,
I have the following function defined:
cubic.distance<-function(x1,y1,z1,x2,y2,z2) { max(c(abs(x1-x2),abs(y1-y2),abs(z1-z2))) }
I have a data frame from which I make subsets.
When I call subset(dataframe,cubic.distance(tb19h,tb37v,tb19v,190,210,227)<=2) I have the result with 0 rows.
However, the data frame contains the row (among others, that suit) tb19v tb19h tb37v 226.6 189.3 208.4
Call cubic.distance(189.3,208.4,226.6,190,210,227) gives [1] 1.6
Next call:cubic.distance(189.3,208.4,226.6,190,210,227)<=2[1] TRUE
It seems to me, that I have made errors somewhere in calls. Could you, please, be so kind, to tell me, where they are?
Your function finds the maximum distance over all rows (it is passed vectors). Replace max() by pmax() for a logical result for each row.
-- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
