# Writing code to call functions

4 views (last 30 days)
Spaceman on 26 Feb 2024
Commented: Spaceman on 26 Feb 2024
Given:
Find: Create a function that calculates the surface area of a sphere when provided with a radius as the input argument. Your code should work for both scalar radius values or an array of radii.
My Solution:
A=4*pi.*r^2
end
r=randi(10,3,1);
Area=AreaSphere(r)
My Issue: I don't think I've learned how to properly call functions because I keep getting errors when trying to run function.

Stephen23 on 26 Feb 2024
"I don't think I've learned how to properly call functions because I keep getting errors when trying to run function."
The problem is how you have written the function: you defined one input argument RADIUS which you did not use anywhere. And then inside the function you refer to a variable/function named R which you did not define anywhere.
You also need to use array operations for element-wise operations:
r=randi(10,3,1);
Area = AreaSphere(r)
Area = 3×1
50.2655 201.0619 314.1593
end % ^^^^^^^^
Spaceman on 26 Feb 2024
Genius. I understand the error of my ways now. I was getting confused on how to define and call what I had defined.

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