plot.nlsrk: Plot of multivariate data fitted by the nlsrk package
In nlsrk: Runge-Kutta Solver for Function nls()

Description Usage Arguments Details Value Author(s) See Also Examples

Plot the experimental points of each trajectory with the lines fitted by nls / nlsrk

1 2	## S3 method for class 'nlsrk' plot(x, data, maintitle = "Ordinary Differential Equations system",...)

`x`	A "nls" object obtained with `evrunge`
`data`	a data.frame with only three columns named (imperatively) t, y, traj in that order
`maintitle`	Title for the graph
`...`	optional parameters for plot

syslin Minimal and preliminary implementation of a plot method for "nls" objects obtained by Runge-Kutta 4 resolution of a set of ODE. The symbols of the experimental points are chosen autom)tically according to the formula pch=19+data$traj. Then, the first trajectory is drawn with pch=20 (black dot), the next with pch=21 (empty circles), etc... see plot(options) and par for details. Similarily, the lines of the fitted solutions are drawn in a color defined automatically according to the formula col=data$traj. The first trajectory is drawn in black (col=1), the next in red (col=2), etc... Any object of type "nls" is accepted by the program, but if it does not result of the use of evrunge, inpredictible errors will occur.

none

jean-sebastien pierre
jean-sebastien.pierre@univ-rennes1.fr

evrunge

##
##	example 1 : solving and plotting the system sys provided in the package
##
data(syslin.don)
syslin<-prepare(syslin.don)
attach(syslin)
nls(y~ evrunge(t,param=c(k1,k2),y0=c(1000,0),sys,graph=FALSE),data=syslin,
	start=list(k1=1,k2=1),trace=TRUE)->m1
plot.nlsrk(m1,syslin)
##