search for: sintegral

...ing the shaped area between the two curves (see image). http://r.789695.n4.nabble.com/file/n4597813/test.png I try to use a Simpson-Integral but it doesn't work. "R" doesn't know the command! It is possible, that i need a library? Curve 1: y Curve 2: z q<-abs(y-z); est<-sintegral(x,z) Greetings -- View this message in context: http://r.789695.n4.nabble.com/Area-between-2-curves-tp4597813.html Sent from the R help mailing list archive at Nabble.com.

...fitting the limited number of voxels is:&nbsp; "Error in approx(x, fx, n = 2 * n.pts + 1) : &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; need at least two non-NA values to interpolate" I think the error is from the library Bolstad since I'm using the sintegral function as part of the fitting equation.&nbsp; I've tried numerous nonlinear functions including: nlm, optim and nlminb, but all stop after performing the fit on a limited number of voxels.&nbsp; I took the values for which the fitting routine stops and I applied different starting val...

Hi, I have a data frame of 2 columns with the following types : data$day char data$value num And I plot my data with : plot(strptime(donnees$day,format="%Y-%m-%d %H:%M:%S"),donnees$value, type="l") And I'd just like to get the numerical value of the integration of this graph. I looked at ?integrate but, as far as I understood (that is, not very much, due to my poor

Hello, I want to know if there are some functions or packages to solve differential and integral equation using R. Thanks. Shao chunxuan. [[alternative HTML version deleted]]