Convert (0,1) values to Boolean

[Pavel_47]

Hello,

The conversion Boolean to (0,1) does exist.

What about inverse conversion, i.e. (0,1) to Boolean.

Actually I'm trying to convert Sign function output (-1, 0, 1) to Boolean.

With ABS function I can reduce (-1, 0, 1) to (0, 1), but then ... how to proceed ?

Thanks

[Pavel_47]

Ok, the solution is quite simple - equal comparator.

Sorry for this post

[Sam_Sharp]

Be careful if using equality floating point numbers - what might appear to be 1, might not actually be 1 depending on how the number is represented in floating point (e.g. it might be 1.00000000000000000000001) and so an Equals? would be false.

Just something to bear in mind - if you're using integers then this isn't a problem.

[Pavel_47]

Thanks Sam,

Sign function has 15-bit precision, I think for my case it will be sufficient.

At other side the problem revealed  a little bit more complicated, i.e. (-1, 0, 1) to boolean - using ABS just converts -1 to 1, wheras I want -1 and 0 --> FALSE, 1 --> TRUE

[Pavel_47]

Here is a solution

[Sam_Sharp]

Just use something like this:

As for your 'other side the problem' - just use a simple select/case structure to get the appropriate value out. Post your code because it sounds like you're over-complicating things.

[Pavel_47]

Thanks Sam,

It seems that I've found a solution (post above).

Quite simple, isn't it ?

[crossrulz]

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@Pavel_47 wrote:

What about inverse conversion, i.e. (0,1) to Boolean.

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The exact inverse is Not Equal To Zero.  It will take even give a TRUE value for your -1 case as well.

[Pavel_47]

For my case the truth table is as follows:

-1, 0 => FALSE

1 => TRUE

I think the solution using increment (as it's shown above) isn't so bad.

[GerdW · Accepted solution]

Hi Pavel,

in this case a ">0" comparison is simpler/"better" than your "+1" "solution"…