On 9/26/07, JeanMichel FRANCOIS <[EMAIL PROTECTED]> wrote:
> Hi there!
> I m trying to make a figure , adding a subplot in it, and then specify the X
> axis with date. I don't have anything to plot at the moment, i just want to
> generate a subplot with axes X and Y up and ready.
>
> All tutorials i have read directly plot sth on the subplot directly, but i
> don't want this in my software.
>
> here is an extract from my code
>
> visitor.figure = pylab.figure(1)
> visitor.figure.clear()
> visitor.figure.set_dpi(self.context.getDPI())
> visitor.figure.set_edgecolor(self.context.getEdgeColor())
> visitor.figure.set_facecolor(self.context.getFaceColor())
> visitor.figure.set_figheight(self.context.getSizeHeight())
> visitor.figure.set_figwidth(self.context.getSizeWidth())
> visitor.subplot = visitor.figure.add_subplot(111)
> visitor.subplot.set_title(self.context.title)
>
> Then the user add his xaxis with parameters like xmin, xmax, step, ...
> But here i don't find how to setup this with pylab.
>
> xaxis = subplot.get_xaxis()
xaxis = subplot.xaxis
> here i don't know how to proceed to set my array of values.
> I have an array of date.
You can plot your array of dates with :
import matplotlib.dates as mdates
l = ax.plot_date(mdates.date2num(mydates), y, 'k-')
Later you can modify the xlimits:
subplot.set_xlim(mdates.date2num(datetime.date(2007,1,1)),
mdates.date2num(datetime.date(2007,7,1)))
or your plot data
l.set_data(newdates, newy)
With recent versions of matplotlib, you can pas dates in directory to
plot and set_xlim and friends ( you don't need to convert them with
date2num). Eg, with
ax.plot(mydates, y)
ax.set_xlim(datetime.date(2007,1,1), datetime.date(2007,7,1))
fig.autofmt_xdate()
JDH
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