[scilab-Users] wired problem of the edit tab

[Mathieu Dubois]

Hello,

Le 27/09/2010 17:42, Peng Du a écrit :
> Many thanks Mathieu, you are so right - it works after I delete some
> variable assignments. But why did they cause the problem?
>
I guess you have unconsciously redefined a scilab variable...

For instance if you define a variable called length the you can no 
longer use the length function. For instance:
x=-10:0.1:10;
length=0;
length(x); // Error length is now a vector

If you execute the code above scilab will print a warning on line 2. You 
can turn this into an error: see help funcprot. This kind of error is 
common in dynamic languages (I remember I had the same issue in Python).

In your case the problem seems to be related with function or operators 
overloading (see help overloading). This one of the most powerful 
functionality of scilab so you may take time to read about it (it took 
me several times to understand). If you are familiar with language that 
allow this (which most object-oriented languages C++, Python, etc. Java 
excepted) this should sound familiar. You may have a look at the 
tutorial by Eike Rietsch at 
http://www.scilab.org/support/documentation/community (see section 6).

I guess you have defined a variable or a function called "handle" (or 
whose name contains "_h") so when scilab was trying to insert something 
your handle "p" it called your function and an error happened...

By the way the error message you first posted was also about operators 
(it complains about function %h_e which is used to extract information 
form a handle). So maybe your first problem also vanished...

HTH,
Mathieu

> On 27 September 2010 16:21, Mathieu Dubois <mathieu.dubois at limsi.fr
> <mailto:mathieu.dubois at limsi.fr>> wrote:
>
>     On 09/27/2010 04:51 PM, Peng Du wrote:
>>     Hi. I tried set the figure properties via commands. But similar
>>     error messages are reported:
>>
>>     I added
>>
>>     p=gcf();
>>     p.figure_name="foo";
>>
>>     Which are excerpt from the example of online documents. And the
>>     console says:
>>
>>     error 21
>>     invalid index
>>     at line 4 of function generic_i_h called by:
>>     line 2 of function %c_i_h called by:
>>     p.figure_name="foo";
>     Very stange... Looks like an overloading issue... Did you clear all
>     your variables?
>
>>
>>     Best regards,
>>
>>     Peng
>>
>>     On 27 September 2010 15:15, Peng Du <eddy.pdu at gmail.com
>>     <mailto:eddy.pdu at gmail.com>> wrote:
>>
>>         Oh dear... scilab suddenly fixed itself, after I did
>>         absolutely nothing..
>>
>>         It is nice to have it working, however my fear is it will come
>>         back anytime without a notice..
>>
>>         Thanks very much Mathieu, I will update this thread if
>>         anything happens again.
>>
>>         Regards,
>>
>>         Peng
>>
>>
>>         On 27 September 2010 14:44, Mathieu Dubois
>>         <mathieu.dubois at limsi.fr <mailto:mathieu.dubois at limsi.fr>> wrote:
>>
>>             On 09/27/2010 03:20 PM, Peng Du wrote:
>>>             Hi Mathieu,
>>>
>>>             I can see the menu after clicking "Edit", however,
>>>             nothing shows up except for those error messages when
>>>             selecting either "figure properties" or "Axes
>>>             properties". I also tried using "entity picker", but
>>>             still, it reports errors when I pick anything on the graph.
>>             Sad... which version are you using? You can try the
>>             classical tip: update your drivers. If the problem
>>             persists you should fill a bug report...
>>
>>             On the bright side if you need to change graphical
>>             properties (changing colours, line style, and so on), you
>>             can do everything with commands. If you are not familiar
>>             with the graphical API you might look at "help
>>             graphical_entities". It is a bit hard but it allows to do
>>             very nice plots. There are lots of help messages in the
>>             archive, too.
>>
>>             If you have a specific request, don't hesitate...
>>
>>             Good luck.
>>
>>>
>>>             Thanks.
>>>
>>>             Peng
>>>
>>>             On 27 September 2010 14:10, Mathieu Dubois
>>>             <mathieu.dubois at limsi.fr
>>>             <mailto:mathieu.dubois at limsi.fr>> wrote:
>>>
>>>                 Hello,
>>>
>>>
>>>                 On 09/25/2010 01:54 AM, Peng Du wrote:
>>>
>>>                     Hi.
>>>
>>>                     When I click the "edit" tab of the graphic
>>>                     window, no new window shows up. Instead the
>>>                     console reports:
>>>
>>>                 "Edit" normally shows a menu... Do you see the menu
>>>                 or not?
>>>
>>>
>>>                     !--error 21
>>>                     invalid index
>>>                     at line 3 of function %h_e called by:
>>>                     line 6 of function getparfig called by:
>>>                     line 21 of function TK_send_handles_list called by:
>>>                     line 40 of function ged called by:
>>>                     ged(4,0)
>>>                     while executing a callback
>>>
>>>                     Does anyone know why this is happening and how to
>>>                     fix it? Thanks a lot.
>>>
>>>                 I remember I had a problem under some old version of
>>>                 scilab (like 5.1.1) when cliking on "Figure
>>>                 properties"... The workaround was to click on "Axes
>>>                 properties".
>>>
>>>                 By the way under scilab 5.3 beta 3 clicking on
>>>                 "Edit->Figure properties" seems to hang scilab... I
>>>                 have attached the bug report...
>>>
>>>                 Mathieu
>>>
>>>
>>
>>
>>
>
>