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From: Jordan on 25 May 2010 11:39
I know there must be an easy way to do this, but I'm new to matlab and have not been able to figure it out and have tried searching for a solution without luck.

I need to convert a signed integer to a 16-bit sign-extended (2's complement) hex number for output to a file.

For example:

3 -> 0003
-3 -> FFFD

I've tried using dec2hex(), but it does not support negative number. I've also tried playing around with a fi object but could not quite figure out how to make that work as I needed it to.

Any suggestions?

Thanks!
From: Walter Roberson on 25 May 2010 11:46
Jordan wrote:
> I know there must be an easy way to do this, but I'm new to matlab and
> have not been able to figure it out and have tried searching for a
> solution without luck.
>
> I need to convert a signed integer to a 16-bit sign-extended (2's
> complement) hex number for output to a file.
>
> For example:
>
> 3 -> 0003
> -3 -> FFFD

> I've tried using dec2hex(), but it does not support negative number.
> I've also tried playing around with a fi object but could not quite
> figure out how to make that work as I needed it to.

>> sprintf('%x', typecast(int16(-3),'uint16'))
ans =
fffd
From: Jordan on 25 May 2010 11:47
Oops, sorry ignore this post, accidental double post.

"Jordan " <jmcoreymv(a)hotmail.com> wrote in message <htgqvc$1e0$1(a)fred.mathworks.com>...
> I know there must be an easy way to do this, but I'm new to matlab and have not been able to figure it out and have tried searching for a solution without luck.
>
> I need to convert a signed integer to a 16-bit sign-extended (2's complement) hex number for output to a file.
>
> For example:
>
> 3 -> 0003
> -3 -> FFFD
>
> I've tried using dec2hex(), but it does not support negative number. I've also tried playing around with a fi object but could not quite figure out how to make that work as I needed it to.
>
> Any suggestions?
>
> Thanks!
From: Jordan on 25 May 2010 11:57
Thanks! That worked great.

Walter Roberson <roberson(a)hushmail.com> wrote in message <BhSKn.17682$TL5.2606(a)newsfe24.iad>...
> Jordan wrote:
> > I know there must be an easy way to do this, but I'm new to matlab and
> > have not been able to figure it out and have tried searching for a
> > solution without luck.
> >
> > I need to convert a signed integer to a 16-bit sign-extended (2's
> > complement) hex number for output to a file.
> >
> > For example:
> >
> > 3 -> 0003
> > -3 -> FFFD
>
> > I've tried using dec2hex(), but it does not support negative number.
> > I've also tried playing around with a fi object but could not quite
> > figure out how to make that work as I needed it to.
>
> >> sprintf('%x', typecast(int16(-3),'uint16'))
> ans =
> fffd
From: Ken Garrard on 25 May 2010 12:15
"Jordan " <jmcoreymv(a)hotmail.com> wrote in message <htgqte$qnn$1(a)fred.mathworks.com>...
> I know there must be an easy way to do this, but I'm new to matlab and have not been able to figure it out and have tried searching for a solution without luck.
>
> I need to convert a signed integer to a 16-bit sign-extended (2's complement) hex number for output to a file.
>
> For example:
>
> 3 -> 0003
> -3 -> FFFD
>
> I've tried using dec2hex(), but it does not support negative number. I've also tried playing around with a fi object but could not quite figure out how to make that work as I needed it to.
>
> Any suggestions?
>
> Thanks!

dec2hex((f<0)*65536+f)

Ken
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