Writing code to call functions

Question

Spaceman 2024-2-26

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2086878-writing-code-to-call-functions

评论： Spaceman 2024-2-26

采纳的回答： Stephen23

在 MATLAB Online 中打开

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:

function A = AreaSphere(radius)
A=4*pi.*r^2
end

Code to call your function

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.

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Answer 1

Stephen23 2024-2-26

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2086878-writing-code-to-call-functions#answer_1416348

在 MATLAB Online 中打开

"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:

https://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

r=randi(10,3,1);
Area = AreaSphere(r)
Area = 3×1
   50.2655
  201.0619
  314.1593
function A = AreaSphere(radius)
A = 4*pi.*radius.^2;
end %     ^^^^^^^^ 