Re: [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       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.ungele...@th-deg.de Web: www.tc-cham.th-deg.de   _______________________________________________ users mailing list users@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

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