# Re: how to make a multi-panel bar plot?

From: Mary Haley <haley_at_nyahnyahspammersnyahnyah>
Date: Mon, 24 Nov 2008 13:58:44 -0700 (MST)

Sorry Gary, I should have been more clear about the unique
variable. For reasons that I don't understand, the internals of
attaching polygons and lines to a plot requires that you use a unique
variable every time you call this function.

I believe you can do this with append:

dum = []

--Mary

On Mon, 24 Nov 2008, Gary Bates wrote:

> Mary,
> Hmmm... I'm still not clear on how to append the polyline and polygon into
> 'plot'. The code below gives me a 3 panel plot, but each panel only contains
> the last bar:
>
>
> plot = []
> npanels=3
> for n in range(npanels):
>
> # Loop through each Y point, and create and draw a bar for it.
> for i in xrange(len(y)):
> xbar,ybar = get_bar(x[i],y[i],dx,ymin)
> print xbar
> print ybar
> plot1=Ngl.xy(wks,xbar,ybar,res)
>
> gsres.gsFillColor = colors[5] # Set color for bar.
> dum1=Ngl.add_polygon(wks,plot1,xbar,ybar,gsres) # Fill the bar.
> dum2=Ngl.add_polyline(wks,plot1,xbar,ybar) # Outline the bar.
>
> plot.append(plot1)
>
>
> -Gary
>
>
> Mary Haley wrote:
>> Hi Gary,
>>
>> and Ngl.add_polyline. This causes the lines and polygons to be attached
>> to the plot, so that when you draw or resize the plot, the lines and
>> polygons will get drawn and/or resized too.
>>
>> These functions behave exactly the same, except you need
>> to make sure they return some kind of unique variable
>>
>> dum1 = Ngl.add_polygon(wks,plot,xbar,ybar,gsres) # Fill the bar.
>> dum2 = Ngl.add_polyline(wks,plot,xbar,ybar) # Outline the bar.
>>
>>
>> --Mary
>>
>> On Mon, 24 Nov 2008, Gary Bates wrote:
>>
>>> hi,
>>>
>>> I have a working pyngl code which makes a bar plot. Now I want to make a
>>> 3-panel bar plot. The panel examples use plot.append to do this, but I
>>> can't work out how to use this approach with Ngl.polygon and Ngl.polyline
>>> below:
>>>
>>> # Loop through each Y point, and create and draw a bar for it.
>>> for i in xrange(len(y)):
>>> xbar,ybar = get_bar(x[i],y[i],dx,ymin)
>>> print xbar
>>> print ybar
>>> plot=Ngl.xy(wks,xbar,ybar,res)
>>>
>>> gsres.gsFillColor = colors[5] # Set color for bar.
>>> Ngl.polygon(wks,plot,xbar,ybar,gsres) # Fill the bar.
>>> Ngl.polyline(wks,plot,xbar,ybar) # Outline the bar.
>>>
>>> Anyone know the solution to this problem?
>>> -Gary
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>
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Received on Mon Nov 24 2008 - 13:58:44 MST

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