How to write this fuction in Matlab? I have an example code in Python

Question

Beket 2023-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/1900435-how-to-write-this-fuction-in-matlab-i-have-an-example-code-in-python

回答： Luca Ferro 2023-1-25

采纳的回答： Jan

在 MATLAB Online 中打开

How to write this fuction in Matlab?

Someone wrote it in Python like this:

def b(r):
return b_1 - (b_1 - b_2) / (r_2 - r_1) * (r - r_1)

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Answer 1

Jan 2023-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/1900435-how-to-write-this-fuction-in-matlab-i-have-an-example-code-in-python#answer_1156025

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Assuming that b_1, b_2, r_1, r_2 are constants:

% As anonymous function:
r_1 = rand;  % Define the constants
r_2 = rand;
b_1 = rand;
b_2 = rand;
b = @(r) b_1 - (b_1 - b_2) / (r_2 - r_1) * (r - r_1);
% Or as a function:
function out = b(r)
r_1 = rand;  % Define the constants
r_2 = rand;
b_1 = rand;
b_2 = rand;
out = b_1 - (b_1 - b_2) / (r_2 - r_1) * (r - r_1);
end

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Answer 2

Jiri Hajek 2023-1-25

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https://ww2.mathworks.cn/matlabcentral/answers/1900435-how-to-write-this-fuction-in-matlab-i-have-an-example-code-in-python#answer_1156030

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Hi, your function contains four parameters, so the python code is incomplete. You can do this several ways in MATLAB, classic syntax would be:

% Test call
myVar = bFunName(10)
myVar = -5
% function definition
function b = bFunName(r)
b_1 = 1;
b_2 = 2;
r_2 = 3;
r_1 = 4;
b = b_1 - (b_1 - b_2) / (r_2 - r_1) * (r - r_1);
end