Functions in Matlab, problem

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Jenny Andersen 2019-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/492163-functions-in-matlab-problem

评论： Image Analyst 2019-11-24

I have a vector A = (A1, A2, A3) which is orthogonal to another unit vector, v = (v1,v2,v3), whose first coordinate is 0. I have come up with the following:

v2 = [0 A(2) -A(3)];
v3 = [0 -A(2) A(3)];
v2 = v2/norm(v2)
v3 = v3/norm(v3)

But if I want to write/code it as a function instead where A is the input value, how do I do that?

I understand that functions can be written as function[v2,v3] = Name(A3,A2) but how do I do it on above if the function is not given?

I have tried with below but all I get is errors, and furthurmore I do not get the coordinates of the vector:

function[v2,v3] = function1(A2,A3)
v2 = +/-A3/sqrt((A2)^2)+(A3)^2);
v3 = +/-A2/sqrt((A2)^2)+(A3)^2);

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Adam 2019-11-20

You expect A to have 3 elements, so you have to pass in a 3-element array, even though you don't use the first one at all. Alternatively you could pass in two arguments as A2 and A3 and change the code accordingly. But clearly a scalar input won't work. How would you expect the equation to calculate V2 and V3?