# How to assign a variable based on an equation?

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Matthew Carragher on 12 Sep 2021
Commented: darova on 13 Sep 2021
I need to update certain material properties as a system cools. The properties are dependant on temperature, and I have equations that relate the values of the properties to temperature.
Is there a way to store an equation of a single variable, then use that equation to determine the value for a new variable?
I want to be able to define the equation at the start of the code and use that equation to determine the new property.
Something along the lines of:
Density_equation = x^2 + 2x + 10
T = 1000
Density = Density_equation(T)
I hope this makes sense, I am having trouble articulating my question.

Paul Hoffrichter on 12 Sep 2021
Inline anonymous functions can be defined as follows:
Density_equation = @(x) x^2 + 2*x + 10
Density_equation = function_handle with value:
@(x)x^2+2*x+10
T = 1000
T = 1000
Density = Density_equation(T)
Density = 1002010
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darova on 13 Sep 2021

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