[Scilab-users] Problems with "To workspace" and "From workspace"

[Paul Bignier]

Hi Michael,

Indeed it looks like you can't overwrite a variable defined in the context.
Have you tried replacing the "FROMWSB" block with a "DOLLAR" block?
Then it would have the same data and activation inputs as the "TOWS_c" 
block,
and you would not need to pre-define 'C' (just give it an initial value 
in the block parameters).

Hope this helps,
Regards,
Paul


On 04/10/2014 09:27 AM, Michael Ungelehrt wrote:
>
> Dear users,
>
> I have a problem with the "To workspace" respectively "From workspace" 
> block in Xcos.
>
> I'd like to write the value of a function to workspace if the value of 
> another function changes its sign from + to -. A short time later I'd 
> like to use this value in a third function and retrieve it from workspace.
>
> For that I evaluate the first function with the "NEGTOPOS_f" block and 
> give the output event to the "TOWS_c" block. The "TOWS_c" block is 
> connected with the second function and should write the value to a 
> vaiable A in the workspace.
>
> The "FROMWSB" block is connected with a third function which should 
> use the variable that is saved before.
>
> Now I have the following problem:
>
> If I start the simulation, the "FROMWSB" says that the variable A does 
> not exist. So my idea was to define the variable in the 
> variable-browser before I start the simulation. If I do so I get an 
> error at the "TOWS_c" block: "Evaluation problem: value not updated 
> from context. Protected variable name. Please choose another variable 
> name."
>
> Is there any solution for that problem?
>
> _Block parameters:_
>
> _From workspace:_
>
> Variable name:                C
>
> Interpolation Method:                 0
>
> Enable zero crossing:     1
>
> Output at end:                 1
>
> _To workspace:_
>
> Size of buffer:                  1
>
> Scilab variable name:     C
>
> Inherit: 0
>
> _Definition of variable C in SciNotes upfront:_
>
> C.time=0;
>
> C.values=0;
>
> Thank you in advance!
>
> Mit freundlichen Grüßen
>
> Best regards,
>
> Michael Ungelehrt
>
> Logo_TC_Cham
>
> Michael Ungelehrt, B.Eng.
>
> Laboringenieur
>
> THD -- Technische Hochschule Deggendorf
> Technologie Campus Cham
>
> Badstraße 21
>
> D-93413 Cham
>
> Tel: +49 9971 99673-29
>
> Fax: +49 9971 99673-69
>
> E-Mail: michael.ungelehrt at th-deg.de <mailto:michael.ungelehrt at th-deg.de>
>
> Web: www.tc-cham.th-deg.de <http://www.tc-cham.th-deg.de/>
>
>
>
> _______________________________________________
> users mailing list
> users at lists.scilab.org
> http://lists.scilab.org/mailman/listinfo/users

-- 
Paul BIGNIER
Development engineer
-----------------------------------------------------------
Scilab Enterprises
143bis rue Yves Le Coz - 78000 Versailles, France
Phone: +33.1.80.77.04.69
http://www.scilab-enterprises.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20140410/7350d133/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 4176 bytes
Desc: not available
URL: <https://lists.scilab.org/pipermail/users/attachments/20140410/7350d133/attachment.jpe>