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dalphai
2005 Aug 23
6
priority of operators in the FOR ( ) statement
.../0 division
if (is.na(fyx)) fyx<-0
#fyx<-ifelse(is.na(fyx),0,fyx);
alpha<-min(1,fyx)
return(alpha)
}
sigma<-0.5;
#nr is the number of iterations
nr<-20
x<-numeric(nr);
x[1]<-1;
t<-1:nr;
for (i in 1:nr-1) {
xi<-x[i];
yi<-rnorm(1,mean=xi,sd=sigma);
ui<-runif(1,0,1);
ualphai<-alphayx(yi,xi);
xn<-ifelse(ui<=ualphai,yi,xi);
x[i+1]<-xn;
}
plot(t,x,type="p")
endtime<-proc.time()[3];
elapsedTime<-endtime-starttime;
cat("Elapsed time is", elapsedTime, "seconds", "\n")
************************************************...
2005 Aug 24
0
(Fwd) Re: priority of operators in the FOR ( ) statement
...yx)
> return(alpha)
> }
>
> sigma<-0.5;
> #nr is the number of iterations
> nr<-20
> x<-numeric(nr);
> x[1]<-1;
> t<-1:nr;
>
> for (i in 1:nr-1) {
> xi<-x[i];
> yi<-rnorm(1,mean=xi,sd=sigma);
> ui<-runif(1,0,1);
> ualphai<-alphayx(yi,xi);
> xn<-ifelse(ui<=ualphai,yi,xi);
> x[i+1]<-xn;
> }
>
> plot(t,x,type="p")
>
> endtime<-proc.time()[3];
> elapsedTime<-endtime-starttime;
> cat("Elapsed time is", elapsedTime, "seconds", "\n&q...