Thread Subject: error

is there any way to check if i have integer elements in a vector??
any help?????

nonyt wrote:
> is there any way to check if i have integer elements in a vector??

I presume this relates to your homework question you posted yesterday, in which
one of the requirements was that you had to check that the elements of the matrix
were integers.

The answer to your question is "No, not reliably". Matlab works with finite
precision, and as far as it is concerned, there is no discernible difference
between 4503599627370496.5 and 4503599627370496. In fact, as far as Matlab
is concerned, there is no discernible difference between
9007199254740992 and 9007199254740993 .

*If* you are willing to restrict the range of values that are to be
operated over, and willing to restrict the meaning of "integers"
then you could consider the test x == floor(x) .
Unfortunately for you, as is pretty common, your assignment was broken
in the form it was written, making a complete solution impossible.


--
.signature note: I am now avoiding replying to unclear or ambiguous postings.
Please review questions before posting them. Be specific. Use examples of what you mean,
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In article <gg6ua5$714$1@fred.mathworks.com>, mariaki16@hotmail.com
says...
> is there any way to check if i have integer elements in a vector??
> any help?????
>
>

Will the function fix help you?


--
Loren
http://blogs.mathworks.com/loren

actualy this i want is to chech if the input is string or float to output an error

nonyt wrote:
> actualy this i want is to chech if the input is string or float to output an error

if ischar(TheArg) || isfloat(TheArg)
  error('Try again, buster!')
end


That's what you have asked for in this posting, but having read the homework question
yesterday, I don't think you'll be happy with this code... The problem revolves
around the definition of the word "integers".

>> isfloat(1+2+3)

ans =
   1

>> isfloat(false)

ans =

   0


--
.signature note: I am now avoiding replying to unclear or ambiguous postings.
Please review questions before posting them. Be specific. Use examples of what you mean,
of what you don't mean. Specify boundary conditions, and data classes and value
relationships -- what if we scrambled your data or used -Inf, NaN, or complex(rand,rand)?