Ensure vertical lines start from x-axis

I'm trying to have the points start from the x-axis (similar to a histogram)
and draw lines upwards. I've attached an image of the program output, as you
can see - there are no red lines from 0-200 on the y-axis. Any ideas how to
start them from zero?

http://www.nabble.com/file/p23707480/image.png

Sample value from list entry for time[]
693596.000003
Sample value from list entry for latency[]
1043

···

#########
Sample Code
#########

def plot_graph():

# Plotting the graph
    plt.plot(time[5300:],latency[5300:], 'r-', linewidth=0.15)

    # Define the axes
    y_label = [0, 200, 400, 600, 800, 1000, 1200]
    plt.axes().set_xlim(xmin=datetime.datetime(1900,1,1,0,0,0,0),
xmax=time[-1])
    plt.axes().set_ylim(ymin=0, ymax=1400)
    plt.axes().set_xticklabels(time, fontdict=None, minor=False, size=10)
    plt.axes().set_yticklabels(y_label, fontdict=None, minor=False, size=10)

    # Labeling the graph
    ax = p.subplot(111)
    ax.xaxis.set_major_locator(MaxNLocator(7))
    plt.gca().xaxis.set_major_formatter(DateFormatter('%M:%S'))
    plt.xlabel(x_axis)
    plt.ylabel(y_axis)
    plt.title(title)

    # Grid
    plt.grid(True)
    plt.grid(alpha=0.1, color='black', linestyle='-', linewidth=0.1)
    plt.savefig(figure)

# plot the graph
plot_graph()
--
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It sounds like you want vlines

  http://matplotlib.sourceforge.net/search.html?q=codex+vlines
  http://matplotlib.sourceforge.net/api/axes_api.html#matplotlib.axes.Axes.vlines

Eg,

  plt.vlines(time[5300:], 0, latenc[5300:], color='red', lw=0.15)

JDH

···

On Mon, May 25, 2009 at 9:02 AM, collern2 <noel.colleran@...287...> wrote:

I'm trying to have the points start from the x-axis (similar to a histogram)
and draw lines upwards. I've attached an image of the program output, as you
can see - there are no red lines from 0-200 on the y-axis. Any ideas how to
start them from zero?

http://www.nabble.com/file/p23707480/image.png

Sample value from list entry for time[]
693596.000003
Sample value from list entry for latency[]
1043

#########
Sample Code
#########

def plot_graph():

# Plotting the graph
plt.plot(time[5300:],latency[5300:], 'r-', linewidth=0.15)

What is the "right" way to produce date-range bars,
like the recession bars in
http://research.stlouisfed.org/fred2/series/TB3MS?cid=116

Thanks,
Alan Isaac

axvspan. See

  http://matplotlib.sourceforge.net/api/axes_api.html#matplotlib.axes.Axes.axvspan
  http://matplotlib.sourceforge.net/examples/pylab_examples/axhspan_demo.html

JDH

···

On Mon, May 25, 2009 at 12:35 PM, Alan G Isaac <alan.isaac@...287...> wrote:

What is the "right" way to produce date-range bars,
like the recession bars in
http://research.stlouisfed.org/fred2/series/TB3MS?cid=116

Great!
Thanks,
Alan

···

On Mon, May 25, 2009 at 12:35 PM, Alan G Isaac <alan.isaac@...287...> wrote:

What is the "right" way to produce date-range bars,
like the recession bars in
http://research.stlouisfed.org/fred2/series/TB3MS?cid=116

On 5/25/2009 1:45 PM John Hunter apparently wrote:

axvspan. See

  http://matplotlib.sourceforge.net/api/axes_api.html#matplotlib.axes.Axes.axvspan
  http://matplotlib.sourceforge.net/examples/pylab_examples/axhspan_demo.html