Vector Field Plotting
Plotting a vector field
vectorfield(fun, xlim, ylim, n = 16,
scale = 0.05, col = "green", ...)fun |
function of two variables — must be vectorized. |
xlim |
range of |
ylim |
range of |
n |
grid size, proposed 16 in each direction. |
scale |
scales the length of the arrows. |
col |
arrow color, proposed ‘green’. |
... |
more options presented to the |
Plots a vector field for a function f. Main usage could be to plot
the solution of a differential equation into the same graph.
Opens a graph window and plots the vector field.
f <- function(x, y) x^2 - y^2
xx <- c(-1, 1); yy <- c(-1, 1)
## Not run:
vectorfield(f, xx, yy, scale = 0.1)
for (xs in seq(-1, 1, by = 0.25)) {
sol <- rk4(f, -1, 1, xs, 100)
lines(sol$x, sol$y, col="darkgreen")
}
grid()
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.