Displaying 1 result from an estimated 1 matches for "initialstep".
2006 Jul 30
0
re 11. uniroot and function opposite signs warning
...nning a while loop steping out until you have a start and finish
thats the function is opposite in sign. You need a "start" and "finish"
where F is + and - on either side of the loop. Graphing F might help.
step<-10
checkme<-F(start)*F(finish+step)
while(checkme>0){
initialstep<-initialstep*2
checkme<-F(start)*F(finish+step)
}
answer<-uniroot(F,low=start,up=finish+step,maxiter=100)$root
Enjoy
Joe Liddle
tfjbl at uas.alaska.edu
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