Questions about Fractions and integers?

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Portgas Ace
Portgas Ace 2012-9-20
James deleted this, so I (Matt Fig) and rewriting it from memory.
How can I make a way to distinguish between integers and fractions? For example, the output will say fraction if the input is a fraction and will say integer if the input is an integer.
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Azzi Abdelmalek
Azzi Abdelmalek 2012-9-20
James, where is the question and the answer? when you post a question, the answer is useful for all members of this forum
Matt Fig
Matt Fig 2012-9-21
OP:
How can I make a way to distinguish between integers and fractions? For example, the output will say fraction if the input is a fraction and will say integer if the input is an integer.

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回答（3 个）

José-Luis
José-Luis 2012-9-20
编辑：José-Luis 2012-9-20
If integer, the following will return true:
floor(your_num) == your_num;
Otherwise, if the number has a fractional part, it will return false.
If you are talking about data type, Matlab is not a strongly typed language, and by default everything is a double. You can however define a number to have integer type
doc int32
and other flavors of integers.
Matt Fig
Matt Fig 2012-9-20
A = 9; % Also try with A = 7/8;
if floor(A)==A
disp('Integer')
else
disp('fraction')
end
Daniel Shub
Daniel Shub 2012-9-20
You can test if a numeric input is an "integer" with validateattributes ...
function TF = mytest(x)
TF = false;
try
validateattributes(x, {'numeric'}, {'integer'});
disp('integer')
catch
disp('fraction')
TF = true;
end

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