trans2pix {pgirmess} | R Documentation |
Convert a transect coordinate file with some landmarks and NA values in between into a matrix with intermediate coordinates.
trans2pix(vect)
vect |
A two column matrix or data.frame |
If vect has more than two column the two first column only are read. This function computes the intermediate coordinates of each lines materialised with NA values.
A matrix with the intermediate coordinates computed.
Patrick Giraudoux <pgiraudo@univ-fcomte.fr>
x<-c(10,NA, NA, NA,56,NA,NA,100) y<-c(23,NA, NA, NA,32,NA,NA,150) cols=c("red","blue","blue","blue","red","blue","blue","red") plot(x,y,col=cols,pch=19) plot(trans2pix(cbind(x,y)),col=cols,pch=19)