how define input data type

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Vasiliki
Vasiliki 2011-3-31
when defining a function, for example
function y = func(x)
how can I define that x is of a specific type, like uint8?

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采纳的回答

David Young
David Young 2011-3-31
See
doc validateattributes

更多回答（2 个）

Jan
Jan 2011-3-31
I do not see the problem.
function y = func(x)
disp(x + x)
And then call it with an UINT8:
func(uint8(1:10))
Or do you want to reject inputs with a deviating type? Then:
function y = func(x)
if ~isa(x, 'uint8')
error('Bad type!');
end
disp(x + x)
Or do you want to convert the input?
function y = func(x)
x = uint8(x);
disp(x + x)
Vasiliki
Vasiliki 2011-3-31
I want to generate c code using the embedded toolbox. The default type of the input is double, but I need integers or fixed point in order to use the c code in a microprocesor. So, I want to see if there is a way that matlab can "understand" that the input will be integer so that when it generates the c code i will have:
uint16 func (uint16 u)
Of course after the generation of the code I can do it maually, but I want to see if there is an automatic way.
  1 个评论
Vasiliki
Vasiliki 2011-4-6
it can be done at the compilation with emlc and -eg emlcoder.egs, defining that the input is of variable size and its type and class is the desirable one.

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