Re: [Matplotlib-users] Help with updating the limits of an axis to reflect the range of new data

[rogerjames99 <ro...@be...>]

Ok the last one got garbled.

My apologies to the list but here is another go.

Hi Thomas,

I posted via nabble. It looks like something stripped the code.

Here is the bit where the axes are set up

    def setup_axes(self, fig, rect):
        """
        With custom locator and formatter.
        Note that the extreme values are swapped.
        """

        transform = PolarAxes.PolarTransform()

        angle_ticks = [(0, r"$Right$"),
                       (.5*pi, r"$Forward$"),
                       (pi, r"$Left$")]
        grid_locator1 = FixedLocator([v for v, s in angle_ticks])
        tick_formatter1 = DictFormatter(dict(angle_ticks))

        grid_locator2 = MaxNLocator(4)

        self.grid_helper = floating_axes.GridHelperCurveLinear(transform,
                                            extremes=(0, pi,
self.sonar_limit, 0),
                                            grid_locator1=grid_locator1,
                                            grid_locator2=grid_locator2,
                                            tick_formatter1=tick_formatter1,
                                            tick_formatter2=None,
                                            )
        self.axes = floating_axes.FloatingSubplot(fig, rect,
grid_helper=self.grid_helper)
        self.axes.axis["bottom"].major_ticklabels.set_rotation(180)
        self.axes.axis["left"].set_axis_direction("bottom")
        self.axes.grid(b=True, which='major', color='b', linestyle='-')
        fig.add_subplot(self.axes)

        # create a parasite axes whose transData in RA, cz
        self.auxiliary_axes = self.axes.get_aux_axes(transform)

        self.auxiliary_axes.patch = self.axes.patch # for auxiliary_axis to
have a clip path as in ax
        self.axes.patch.zorder=0.9 # but this has a side effect that the
patch is
                            # drawn twice, and possibly over some other
                            # artists. So, we decrease the zorder a bit to
                            # prevent this.

        self.lines, = self.auxiliary_axes.plot(self.theta, self.radius)


and here is the bit where the plot is updated


    def idleCallback(self):
        global root
        plotit = False
        logging.debug('Acquire the data lock')
        self.dataLock.acquire()
        if self.newSonarDataAvailable:
            plotit = True
            theta = self.theta[:]
            radius = self.radius[:]
            selfNewSonarDataAvailable = False
        self.dataLock.release()
#        theta.insert(0, 0.)
#        theta.append(0.)
#        radius.insert(0, 0.)
#        radius.append(0.)
        if plotit:
            logging.debug('Plotting')
            self.lines.set_data(theta, radius)
            self.axes.relim()
            self.axes.autoscale_view()
            self.canvas.draw()

if have also put the full code file  here
<https://dl.dropboxusercontent.com/u/84613021/barnaby.py>  

As you can see I have been trying a few other things. Looks like if am
missing the boat pretty comprehensively!





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