[scilab-Users] vector elementwise division 1./[1 2 3 4]

[Francis Drossaert]

You could also use

1../v1
[1]./v1 

the latter one is probably the most elegant one since ./ is a vector operation and writing the integer as a vector would adhere to the operation. But I have to agree it is a pitfall, which is not easy to debug since it gives a solution albeit a wrong one.

Cheers,

Francis


-----Original Message-----
From: Antoine ELIAS [mailto:antoine.elias at scilab.org] 
Sent: 02 September 2008 10:00
To: users at lists.scilab.org
Subject: Re: [scilab-Users] vector elementwise division 1./[1 2 3 4]

Hi Bagvian,

Yes it's strange but "normal' :D
Scilab's parser tries to interpret "1." and after "/V1"
So for Scilab you try to divide 1.0 ( floating point value ) by V1 ( not element wise ) To be sure Scilab use "./" operator, add spaces around operator like "1 ./ V1"

Regards,
Antoine ELIAS

bagvian a écrit :
> Hi,
>
> Old Matlab user, I wanted to create a simple row vector (say V1) and 
> inverse each of its components with the values to be set in another 
> row vector (say V2). I typed in Scilab prompt:
>
> V1=[1 2 3 4] ;
>
> V2=1./V1
>
> I obtained :
>
> V2 =
>
> 0.0333333
>
> 0.0666667
>
> 0.1
>
> 0.1333333
>
> Amazing, isn't?
>
> In order to get the result I expected, I had to type :
>
> V2=(1)./V1
>
> To obtain:
>
> V2 =
>
> 1. 0.5 0.3333333 0.25
>
> Don't you find this behaviour rather inappropriate?
>
> Thanks for your comments, Bagvian
>   


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