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Defining vectors in MATLAB

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Annalise
Annalise 2015-2-28
评论： Star Strider 2015-2-28
Hopefully this is understandable...
I'm writing a function that requires two variables to be entered, M1 and M2. And defined it in a way such that M = [M1 M2] within the function. The equation required requires the use of M1 and M2.
So on my m-file page, is it possible to say that M = [3 4], such that the program can use M1 = 3, M2 = 4. I want to make it so that I don't have to enter the variables into my function file, but into the m-file instead, so that any value can be used for M1 and M2.
Is this possible?
Thank you.

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Star Strider
Star Strider 2015-2-28
It is not only possible, it is the correct way to design your code, if I understand correctly what you want to do.
You would reference ‘M’ differently, though:
M1 = 3;
M2 = 4;
M = [M1, M2];
then to refer to the elements of ‘M’:
M1 = M(1);
M2 = M(2);
I’m not certain what you want to do, so if you’re asking something different than what I wrote, please clarify.

更多回答（1 个）

Image Analyst
Image Analyst 2015-2-28
You say "so that I don't have to enter the variables into my function file, but into the m-file instead" so I take it that you have two m-files , one is a "function file" and the other "m-file" is your script. So in your script I'd define the two variables
M1 = 3;
M2 = 4;
output = MyFunction(M1, M2);
Then in your "function file" "function that requires two variables to be entered, M1 and M2" , I'd have this where you list the two variables in the input argument list:
function output = MyFunction(M1, M2)
M = [M1, M2];
% more code that uses M....

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