[Scilab-users] Refresh plot from Slider

Mon Sep 8 10:34:22 CEST 2014

Exactly Antoine, thanks for adding on to this.

CL

On 08-Sep-14 4:20 PM, Antoine Monmayrant wrote:
> On 09/07/2014 08:58 AM, Tan Chin Luh wrote:
>> Hi,
>>
>> first of all, the handles to the sliders are wrong, you were using 
>> the text handles instead of the sliders handles in both pushbutton 
>> and slider callback.
>>
>> secondly you need to be careful on the sampling, with 0.01, u could 
>> only plot sine wave
>> with < 50 Hz. (nyquist)
>>
>> finally remember to delete the previous plot before redrawing. infact 
>> it is not the best way to delete and plot and redraw it everytime 
>> especially you want to use the slider to plot the graph, be ready for 
>> a lagging effect.
> The fastest option is to modify the data in the plot (and re-zoom if 
> needed) instead of deleting/replotting.
>
> Antoine
>>
>> hope this helps.
>>
>> rgds,
>> CL
>>
>> On 07-Sep-14 12:32 PM, tanthiamhuat wrote:
>>> referring to the below weblink
>>> http://www.equalis.com/blogpost/731635/Scilab-Tips?tag=guibuilder+graphic+user+interface 
>>>
>>>
>>> How do we refresh the plot with the slider? I try to put in the code 
>>> for the
>>> Plot button, but it does not work.
>>> see code below, thanks.
>>>
>>> // This GUI file is generated by guibuilder version 2.2
>>> //////////
>>> f=figure('figure_position',[375,60],'figure_size',[656,604],'auto_resize','on','background',[33],'figure_name','Graphic 
>>>
>>> window number %d');
>>> //////////
>>> delmenu(f.figure_id,gettext('File'))
>>> delmenu(f.figure_id,gettext('?'))
>>> delmenu(f.figure_id,gettext('Tools'))
>>> toolbar(f.figure_id,'off')
>>> handles.dummy = 0;
>>> handles.sliderAmp=uicontrol(f,'unit','normalized','BackgroundColor',[0.8,0.8,0.8],'Enable','on','FontAngle','normal','FontName','helvetica','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[0,0,0],'HorizontalAlignment','center','ListboxTop',[],'Max',[20],'Min',[0],'Position',[0.0932716,0.8253968,0.23,0.0335714],'Relief','flat','SliderStep',[10,10],'String','1','Style','slider','Value',[10],'VerticalAlignment','middle','Visible','on','Tag','sliderAmp','Callback','sliderAmp_callback(handles)') 
>>>
>>> handles.sliderFreq=uicontrol(f,'unit','normalized','BackgroundColor',[0.8,0.8,0.8],'Enable','on','FontAngle','normal','FontName','helvetica','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[0,0,0],'HorizontalAlignment','center','ListboxTop',[],'Max',[100],'Min',[0],'Position',[0.0932716,0.7097502,0.23,0.0335714],'Relief','flat','SliderStep',[20,20],'String','1','Style','slider','Value',[50],'VerticalAlignment','middle','Visible','on','Tag','sliderFreq','Callback','sliderFreq_callback(handles)') 
>>>
>>> handles.Amp=uicontrol(f,'unit','normalized','BackgroundColor',[0.8,0.8,0.8],'Enable','on','FontAngle','normal','FontName','helvetica','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[0,0,0],'HorizontalAlignment','center','ListboxTop',[],'Max',[100],'Min',[0],'Position',[0.1548765,0.7891473,0.0964815,0.0324031],'Relief','flat','SliderStep',[0.01,0.1],'String','Amplitude','Style','text','Value',[20],'VerticalAlignment','middle','Visible','on','Tag','Amp','Callback','sliderAmp_callback(handles)') 
>>>
>>> handles.Freq=uicontrol(f,'unit','normalized','BackgroundColor',[0.8,0.8,0.8],'Enable','on','FontAngle','normal','FontName','helvetica','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[0,0,0],'HorizontalAlignment','center','ListboxTop',[],'Max',[100],'Min',[0],'Position',[0.1551235,0.6595349,0.1083951,0.0339535],'Relief','flat','SliderStep',[0.01,0.1],'String','Frequency','Style','text','Value',[1],'VerticalAlignment','middle','Visible','on','Tag','Freq','Callback','') 
>>>
>>> handles.pbPlot=uicontrol(f,'unit','normalized','BackgroundColor',[0.6,0.6,0.6],'Enable','on','FontAngle','normal','FontName','helvetica','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[0,0,0],'HorizontalAlignment','center','ListboxTop',[],'Max',[1],'Min',[0],'Position',[0.0932716,0.4604651,0.0952469,0.0403876],'Relief','raised','SliderStep',[0.01,0.1],'String','Plot','Style','pushbutton','Value',[0],'VerticalAlignment','middle','Visible','on','Tag','pbPlot','Callback','pbPlot_callback(handles)') 
>>>
>>> handles.Axes1= newaxes();handles.Axes1.margins = [ 0 0 0
>>> 0];handles.Axes1.axes_bounds = 
>>> [0.3503086,0.0503876,0.5895062,0.5949612];
>>> handles.editTime=uicontrol(f,'unit','normalized','BackgroundColor',[0.8,0.8,0.8],'Enable','on','FontAngle','normal','FontName','helvetica','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[0,0,0],'HorizontalAlignment','center','ListboxTop',[],'Max',[1],'Min',[0],'Position',[0.0932716,0.5829279,0.2114198,0.0447471],'Relief','sunken','SliderStep',[0.01,0.1],'String','0:0.01:10','Style','edit','Value',[0],'VerticalAlignment','middle','Visible','on','Tag','editTime','Callback','') 
>>>
>>>
>>>
>>> //////////
>>> // Callbacks are defined as below. Please do not delete the comments 
>>> as it
>>> will be used in coming version
>>> //////////
>>>
>>> function sliderAmp_callback(handles)
>>> //Write your callback for  slide1  here
>>> funcprot(0)
>>> amp = get(handles.Amp,'value');
>>> frq = get(handles.Freq,'value');
>>> t= evstr(get(handles.editTime,'String'));
>>> y=amp.*sin(2*%pi*frq.*t);
>>> plot(t,y);
>>> endfunction
>>>
>>>
>>> function sliderFreq_callback(handles)
>>> //Write your callback for  sliderFreq  here
>>>
>>> endfunction
>>>
>>>
>>> function pbPlot_callback(handles)
>>> //Write your callback for  pbPlot  here
>>> funcprot(0)
>>> amp = get(handles.Amp,'value');
>>> frq = get(handles.Freq,'value');
>>> t= evstr(get(handles.editTime,'String'));
>>> y=amp.*sin(2*%pi*frq.*t);
>>> //if ~isempty(handles.Axes1.children)
>>> //    delete(handles.Axes1.children)
>>> //end
>>> plot(t,y); xgrid();
>>> endfunction
>>>
>>>
>>>
>>>
>>>
>>>
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