Thread: [Matplotlib-users] Difference in show and output file

Dear All,

I am trying to write a program in matplotlib to generate stacked bar graphs.
My problem is that the commands -  plt.show() and self.fig.savefig(fileName)
generate different outputs.
I tried different output formats like PDF, PNG, EPS. But the problem remains
the same.
This happens for the lines that I am trying to draw outside the plot.
I am trying to draw vertical lines between xticklabels.
I have uploaded the data file and the code file.
http://old.nabble.com/file/p33893817/data.dat data.dat 
http://old.nabble.com/file/p33893817/matplot1.py matplot1.py 
Could anyone explain how to resolve this problem?

Thank You,
Raj
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Just in case, if anyone needs the answer, I figured it out.
I used the transData transform in order to draw the lines correctly.

Here is the code - 

# The code below is to add the lines near the tick labels
fig = barGraph.fig
xAxisLim=barGraph.ax.xaxis.get_view_interval()
tickLocArray = barGraph.ax.xaxis.get_majorticklocs()
yStart=-70
yEnd=-0.5
line = Line2D([xAxisLim[0], xAxisLim[0]], 
              [yStart,yEnd],linewidth=2, color='black',
               transform=barGraph.ax.transData)

fig.lines.append(line)

for i in xrange(11):
    lnWidth=2
    yStartOffset=0
    if((i+1)%4 != 0):
        lnWidth=1
        yStartOffset=20  
    xOffset = tickLocArray[i] + (tickLocArray[i+1] - tickLocArray[i])/2
    line = Line2D([xOffset, xOffset], 
              [yStart+yStartOffset,yEnd],linewidth=lnWidth, color='black',
               transform=barGraph.ax.transData)  
    fig.lines.append(line)
    
              
line = Line2D([xAxisLim[1], xAxisLim[1]], 
              [yStart,yEnd],linewidth=2, color='black',
               transform=barGraph.ax.transData)

fig.lines.append(line)

plt.figtext(0.247, 0.05, '1')
plt.figtext(0.523, 0.05, '2')
plt.figtext(0.797, 0.05, '4')


Thank You!
Raj


rajtendulkar wrote:
> 
> Dear All,
> 
> I am trying to write a program in matplotlib to generate stacked bar
> graphs.
> My problem is that the commands -  plt.show() and
> self.fig.savefig(fileName) generate different outputs.
> I tried different output formats like PDF, PNG, EPS. But the problem
> remains the same.
> This happens for the lines that I am trying to draw outside the plot.
> I am trying to draw vertical lines between xticklabels.
> I have uploaded the data file and the code file.
>  http://old.nabble.com/file/p33893817/data.dat data.dat 
>  http://old.nabble.com/file/p33893817/matplot1.py matplot1.py 
> Could anyone explain how to resolve this problem?
> 
> Thank You,
> Raj
> 

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