Readers, Two variables 'M', 'T', each contain a column of numbers.
Have tried to create a derivative function to see how 'M' varies with respect to 'T': dm<-D(m)(dm/dt)~dt dm(m=M,t=T) but R returns an error: Error: could not find function "dm" What is my mistake please? -- R2151 ______________________________________________ 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.
