how can i add unit in both input and output

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Ga Ma 2020-4-7

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评论： Ga Ma 2020-4-8

I have a function looks like this. Now, i want add unit in both input and output. For example, if i i run money("dollar", 3), i will get: price= 3 dollar. Or if i run money("dollar",2,3 ), i will get price = 48 dollar. i don't know what code can do this.. please help me, thank you very much.

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Geoff Hayes 2020-4-8

Is it necessary to pass in the units of the input variable(s)? Does the function body depend upon it for anyting other than providing an output string (or two parameters?) that indicate a numeric value and the unit?

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Answer 1

Image Analyst 2020-4-8

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Not exactly sure what formula you're using but this might be close:

price = money('dollar')
price = money('dollar', 2)
price = money('dollar', 2, 3)
function price = money(varargin)
price = '';
% nargin
% varargin
if nargin < 2
	return;
end
if nargin >= 2
	units = varargin{1};
	p = varargin{2};
	p0 = varargin{2};
end
if nargin >= 3
	exponent = varargin{3};
	% Compute p = k * k^2 * k^3 * k^4 * etc.
	for k = 2 : exponent
		p = p * p0 ^ k;
	end
end
price = sprintf('price = %.2f %s', p, units);
end