Alaios <alaios <at> yahoo.com> writes: > > Hello I have two function in R > like > g(x)=2x-3 > and s(x)=5x^2+2 > > and I want to find the integrafl of the g(x)*s(x) inside the interval of [a,b] >
Analytically or numerically? It sounds like you want the answer analytically, in which case R can't do it, but it is an easy integral g(x)*s(x) = 10*x^3-15*x^2+4*x-6 indefinite integral = 10/3*x^4 -15/3*x^3 + 4/2*x^2 - 6*x + C evaluate between a and b or if you can't do this (although this is a very basic integral) you can try it on Wolfram alpha/the Mathematica integrator (google for it) use ?integrate (surprisingly enough) for 1-D numerical integration ______________________________________________ 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.