# [Scilab-users] What can be done with a signed zero -0 ?

5 messages
Open this post in threaded view
|

## [Scilab-users] What can be done with a signed zero -0 ?

 Dear co-users, I am somewhat rediscovering that Scilab allows to defined a signed zero: --> zm = -0   zm  =     0. --> 1/zm   ans  =    -Inf It looks not documented. I am wondering where is the best place to document it (i mean, which existing page?), and even if it is worthwhile to document it. Indeed, what can be done with it? Beside inverting it into -%inf, other operations are rather disappointing: --> zm==0   ans  =    T --> zm<0   ans  =    F --> sign(zm)   ans  =     0. Any idea about applications? Cheers Samuel _______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users
Open this post in threaded view
|

## Re: What can be done with a signed zero -0 ?

 Samuel, Regarding signed zero applications, check this page out: https://www.advanpix.com/2016/04/28/branch-cuts-and-signed-zeros-in-matlab/Regards, Rafael -----Original Message----- From: users [mailto:[hidden email]] On Behalf Of Samuel Gougeon Sent: Friday, June 29, 2018 1:13 AM To: International users mailing list for Scilab. <[hidden email]> Subject: [Scilab-users] What can be done with a signed zero -0 ? Dear co-users, I am somewhat rediscovering that Scilab allows to defined a signed zero: --> zm = -0   zm  =     0. --> 1/zm   ans  =    -Inf It looks not documented. I am wondering where is the best place to document it (i mean, which existing page?), and even if it is worthwhile to document it. Indeed, what can be done with it? Beside inverting it into -%inf, other operations are rather disappointing: --> zm==0   ans  =    T --> zm<0   ans  =    F --> sign(zm)   ans  =     0. Any idea about applications? Cheers Samuel _______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users_______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users
Open this post in threaded view
|

## Re: What can be done with a signed zero -0 ?

 Le 29/06/2018 à 01:25, Rafael Guerra a écrit : > Samuel, > > Regarding signed zero applications, check this page out: > https://www.advanpix.com/2016/04/28/branch-cuts-and-signed-zeros-in-matlab/Thanks. And this one: https://en.wikipedia.org/wiki/Signed_zeroIt would be possible to document it in the ieee() or number_properties pages, or the zeros() one, or the %inf one, or in a dedicated page, to report Scilab behaviors wrt it for some particular functions... Reports about Scilab functions that make a difference between -0 and 0 are welcome. _______________________________________________ users mailing list [hidden email] http://lists.scilab.org/mailman/listinfo/users