Description

In order to define a multivariable function $f(x,y)$ we must first define the second variable. The Sage cell below gives us the value of the function $f(x,y) = 2x^2 + 3y^2$ at the values $x=2$, $y=5$.

Sage Cell

Code

var('y')
f(x, y) = 2 * x^2 + 3 * y^2
f(2, 5)

Options

Half Evaluating a Function

We can lock one or more variables of a multivariable function and evaluate the function given the locked value

This also works using expressions instead of numbers:

var('y')
f(x, y) = 2 * x^2 + 3 * y^2
f(x=1)

var('y a')
f(x, y) = 2 * x^2 + 3 * y^2
f(x=a + 2)

Tags

Primary Tags:

Secondary Tags:

Related Cells

Attribute

Permalink:

Author:

Date: 06 Nov 2018 15:44

Submitted by: James A Phillips