Determine integers in an array and show the results

Hello, my friends

New to Matlab user

Let's say I want to determine the integers in x=[1 2.5 3.6 4] and get the result x_int=[1 4]. How can I do it?

Thank you

[Jan]

If the readers assume, that you ask a homework question, the answers are not complete, because you can create a solution by your own and submit it without cheating then.

[rbarata]

Then the readers should assume that for everybody, just in case. This is not an homework. I'm 50 years old and an engineer for more than 25, so I'm just a curious guy trying to do some exercises from a pdf that I've found in the web. :)

Answer 1

[rbarata]

Thanks for the reply, Walter

Since all the other functions are for rounding operations, I think the best opt is to do something like this:

mod(x,1)

So, the condition to select my data (the integers) could be those elements on which mod(x,1)==0. But how do I select them in order to show them as the result? I could use b=find(mod(x,1)==0) but it gives me the indexes (position in the array) and not their values.

[Walter Roberson]

x(b)

Answer 2

[Walter Roberson]

Integral have several properties that can be tested:

• round() and floor() and ceil() and fix() of the value equals the value itself
• mod() of the value with 1 equals 0

Answer 3

[rbarata]

Thank you Walter. It worked.

[Walter Roberson]

Please use the "Comment on this Answer" buttons instead of adding a new Answer each time.