[Scilab-users] Stepping through a script with graphics

[Claus Futtrup]

Hi

Stepping through a script would be a wonderful (debugging) feature to be 
added to SciNotes.

Many years ago when I was programming Turbo Pascal 7, inserting a 
breakpoint and then stepping through a section of the code while 
monitoring variables, was a good way to study the logic and debug code.

Best regards,
Claus

On 30-11-2016 10:44, Jens Simon Strom wrote:
> Hi,
> I would like to share a function with the community which supports 
> stepping through a script:
>
> function!XCLICK()//Stops a script and offers restart options by pressing a key
>      //Helpful for presenting a sequence of graphics or print results 
> step-by-step
>      //Call: !XCLICK(), always without arguments
>      //First figure must be clicked on focus.
>      //key SPACE returns to the calling function (for next plot or script 
> section)
>      //key a aborts execution
>      //key b sets the global variable GLOB=%t (default: %f).
>      // This can e.g. be used to break a while loop.
>      // In this case GLOB must be paired in the calling script and
>      // >>if GLOB, break,end<<has to follow >>!XCLICK()<<.
>      // Without loop key b is equivalent to key SPACE. A figure is created 
> automatically.
>      //key i prints key options
>      //Rotate and Zoom options of graphics are maintained.
>      global GLOB
>      GLOB=%f
>      [ib,x,y]= xclick()
>      if ib==32 then//SPACE, returns to calling function
>        return
>      elseif ib==97//a, ends execution
>        disp('Script aborted.')
>        xdel();
>        abort
>      elseif ib==105//i, shows key options
>      disp(['KEY OPTIONS';
>            'space: return to calling function';
>            'b: set GLOB=%t';
>            'a: terminate execution';
>            'i: show key options'])
>            !XCLICK()
>      elseif ib==98//b
>        GLOB=%t
>        return
>      else
>        !XCLICK()
>      end
>   endfunction//!XCLICK() //Here is how I tested the function: xdel();
> global GLOB
> n=5;
> for i=1:n;
>    plot([1 2*i])
>    !XCLICK(), if GLOB, break, end
> end
> surf()
> !XCLICK()
> clf();
> plot3d()
> !XCLICK()
> clf();
> histplot();
> !XCLICK()
> xdel()
> while %t
>    disp('Terminate infinite loop by pressing b.')
>   !XCLICK(), if GLOB ,break, end
> end
> If the benefits of the function are easier to get please advise; flaws 
> also please.
> Cheers
> Jens
>
>
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