How to Calculate Y-Values Using a Custom Function in MATLAB

How can we create a custom function to calculate y-values in MATLAB?

In the given data, we have a function formula for y = x^3 + 4x^2 + 3. How can we create a custom function in MATLAB to calculate y-values based on this formula?

Creating a Custom Function in MATLAB

To create a custom function in MATLAB for the given function y = x^3 + 4x^2 + 3, follow these steps:

1. Define the function using the `function` keyword.
2. Utilize the appropriate operators for calculation.
3. Return the calculated value of y.

When creating a custom function in MATLAB, start by defining the function using the `function` keyword. The function should take input parameter(s) and perform the necessary calculations according to the specified formula.

In this case, the custom function for y = x^3 + 4x^2 + 3 can be defined as follows:

function y = testf(x)
y = x.^3 + 4*x.^2 + 3;
end

Here, the `function` keyword is used to define the function `testf`, which takes the input parameter `x`. The function calculates the value of `y` based on the formula provided and returns it as the output. The `.^` operator is used for element-wise operations.

Once the custom function `testf` is defined, you can use it to calculate the y-values at specific x-values as required.