Syntax

d = Derivative(x,y)

Argument

Name

Description

x

A vector of the independent variable values.

y

A vector of the dependent variable values at the independent variable values.  Must be of same length as x.

Output

Name

Description

d

The derivative at each point of x.

Example

Find the derivatives at each point of x:

Syntax

x = [1:5]

y = Exp(x)

d = Derivative(x,y)

Result

d = 4.6708  8.6836  23.605  64.164  93.815

Comments

The algorithm uses central differencing for inner points and uses forward and backward differencing for the end points.  The argument values must be real.