As you have not given us a reproducible example (namely we don't really know what "test" is), there are likely better ways to do this than what I am about to suggest, and you can find examples in the relevant plot functions likely, but I think what you want can be achieved using ifelse:
plot(test, col = ifelse(test[,1]<8 , "steelblue2" ,"wheat2") ) Haris Skiadas Department of Mathematics and Computer Science Hanover College On Mar 23, 2008, at 7:06 PM, Donna Tucker wrote: > > Is there any way to use more than one color or shape in the same > plot. I would like to make the points different colors for various > levels of a variable. I have tried a simple 'if' statement in the > plot command, but I get an error message. Here is what I have > tried and the error message I get: > plot(test, if(test[,1]<8) > col="steelblue2" else col="wheat2")Error in xy.coords(x, y, xlabel, > ylabel, log) : 'x' and 'y' lengths differIn addition: Warning > message:In if (test[, 1] < 8) col = "steelblue2" else col = > "wheat2" : the condition has length > 1 and only the first element > will be usedI know 'x' and 'y' lenghths do NOT differ. If I just > do plot(test), it works perfectly. Is there any way to this? > Thanks,Donna ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.