Nothing
Circle.fun <- function(times,y,p,more)
{
r = y;
r[,1] = p[1]*y[2];
r[,2] = -p[2]*y[1];
return(r)
}
Circle.dfdx <- function(times,y,p,more)
{
r = array(0,c(dim(y),ncol(y)))
r[,1,2] = p[1];
r[,2,1] = -p[2];
return(r)
}
Circle.dfdp <- function(times,y,p,more)
{
r = array(0,c(dim(y),length(p)))
r[,1,1] = y[2];
r[,2,2] = -y[1];
return(r)
}
Circle.d2fdx2 <- function(times,y,p,more)
{
r = array(0,c(dim(y),ncol(y),ncol(y)))
return(r)
}
Circle.d2fdxdp <- function(times,y,p,more)
{
r = array(0,c(dim(y),2,length(p)))
r[,1,2,1] = 1;
r[,2,1,2] = -1;
return(r)
}
make.Circle <- function()
{
return(
list(
fn = Circle.fun,
dfdx = Circle.dfdx,
dfdp = Circle.dfdp,
d2fdx2 = Circle.d2fdx2,
d2fdxdp = Circle.d2fdxdp
)
)
}
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