num_diff: Differentiate on a Grid

In osorensen/mytools: Functions I Often Use

Description

Differentiate on a Grid

Usage

num_diff(f, grid)

Arguments

f	A sequence of values of a function
grid	The corresponding x axis

Value

The derivative on the grid.

Examples

x <- seq(from = 0, to = 2 * pi, by = 0.01)
f <- sin(x)
df <- num_diff(f, x)

plot(x, cos(x), type = "l", col = "red")
points(x, df, col = "blue")

osorensen/mytools documentation built on May 3, 2019, 5:47 p.m.