Comments and cleanup in LineViewPlot
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121
system/plots.py
121
system/plots.py
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@ -398,97 +398,129 @@ class Plot (View):
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class LineViewPlot(Plot):
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"""Line view of current selection, no interaction
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Only works on 2d-arrays
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"""Line view plot with percentiles.
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A line view of vectors across a specified dimension of input dataset.
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No selection interaction is defined.
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Only support for 2d-arrays.
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input:
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-- major_axis : dim_number for line dim (see scipy.ndarray for axis def.)
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-- minor_axis : needs definition only for higher order arrays
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ps: slow (cant get linecollection and blit to work)
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fixme: slow (cant get linecollection and blit to work)
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"""
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def __init__(self, dataset, major_axis=1, minor_axis=None, name="Line view"):
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self.use_blit = False
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self._last_index = []
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self._data = dataset.asarray()
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self.dataset = dataset
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Plot.__init__(self, name)
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self.ax = self.fig.add_subplot(111)
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#self.ax.set_title(self.get_title())
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self.current_dim = self.dataset.get_dim_name(major_axis)
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self._data = dataset.asarray()
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if len(self._data.shape)==2 and not minor_axis:
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minor_axis = major_axis-1
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self.major_axis = major_axis
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self.minor_axis = minor_axis
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Plot.__init__(self, name)
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self.use_blit = False #fixme: blitting does work
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self.current_dim = self.dataset.get_dim_name(major_axis)
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# make axes
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self.ax = self.fig.add_subplot(111)
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#initial draw
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x_axis = scipy.arange(self._data.shape[minor_axis])
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self.line_segs=[]
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for xi in range(self._data.shape[major_axis]):
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yi = self._data.take([xi], major_axis)
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yi = self._data.take([xi], major_axis).ravel()
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self.line_segs.append([(xx,yy) for xx,yy in izip(x_axis, yi)])
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#background
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xax = scipy.arange(self._data.shape[0])
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# draw background
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self._set_background(self.ax)
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# add canvas
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self.add(self.canvas)
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self.canvas.show()
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# add toolbar
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#FIXME: Lineview plot cannot do selections -> disable in toolbar
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#self._toolbar = PlotToolbar(self)
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self.canvas.mpl_connect('resize_event', self.clear_background)
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def _set_background(self,ax):
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"""Add three patches representing [min max],[5,95] and [25,75] percentiles, and a line at the median.
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"""
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# settings
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patch_color = 'b' #blue
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patch_lw = 0 #no edges
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patch_alpha = .15 # transparancy
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median_color = 'b' #blue
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median_width = 1.5 #linewidth
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percentiles = [0, 5, 25, 50, 75, 100]
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# ordinate
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xax = scipy.arange(self._data.shape[self.minor_axis])
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#vertices
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verts_0 = [] #100,0
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verts_1 = [] # 90,10
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verts_2 = [] # 75,25
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med = []
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# add top vertices the low vertices (do i need an order?)#background
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for i in xax:
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pp = prctile(self._data[i,:], [0.,5.,25,50.,75.,95.,100])
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verts_0.append((i,pp[0]))
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verts_1.append((i,pp[1]))
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verts_2.append((i,pp[2]))
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prct = prctile(self._data.take([i], self.minor_axis), percentiles)
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verts_0.append((i, prct[0]))
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verts_1.append((i, prct[1]))
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verts_2.append((i, prct[2]))
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med.append(prct[3])
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for i in xax[::-1]:
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pp = prctile(self._data[i,:], [0.,5.,25,50.,75.,95.,100])
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verts_0.append((i, pp[-1]))
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verts_1.append((i, pp[-2]))
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verts_2.append((i, pp[-3]))
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med.append(pp[3])
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prct = prctile(self._data.take([i], self.minor_axis), percentiles)
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verts_0.append((i, prct[-1]))
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verts_1.append((i, prct[-2]))
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verts_2.append((i, prct[-3]))
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bck0 = Polygon(verts_0, alpha=.15, lw=0)
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bck1 = Polygon(verts_1, alpha=.15, lw=0)
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bck2 = Polygon(verts_2, alpha=.15, lw=0)
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# make polygons from vertices
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bck0 = Polygon(verts_0, alpha=patch_alpha, lw=patch_lw,
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facecolor=patch_color)
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bck1 = Polygon(verts_1, alpha=patch_alpha, lw=patch_lw,
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facecolor=patch_color)
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bck2 = Polygon(verts_2, alpha=patch_alpha, lw=patch_lw,
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facecolor=patch_color)
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self.ax.add_patch(bck0)
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self.ax.add_patch(bck1)
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self.ax.add_patch(bck2)
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self.ax.plot(xax,med, 'b')
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self.ax.autoscale_view()
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self.add(self.canvas)
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self.canvas.show()
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#FIXME: Lineview plot cannot do selections -> disable in toolbar
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self._toolbar = PlotToolbar(self)
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self.canvas.mpl_connect('resize_event', self.clear_background)
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# add polygons to axes
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ax.add_patch(bck0)
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ax.add_patch(bck1)
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ax.add_patch(bck2)
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# median line
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ax.plot(xax, med, median_color, linewidth=median_width)
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def clear_background(self, event):
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"""Callback on resize event. Clears the background.
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"""
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self._background = None
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def set_current_selection(self, selection):
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"""Draws the current selection.
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"""
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ids = selection[self.current_dim] # current identifiers
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index = self.dataset.get_indices(self.current_dim, ids)
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if len(index)==0: # do we have a selection
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return
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if self.use_blit:
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if self._background is None:
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self._bbox = self.ax.bbox.deepcopy()
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self._background = self.canvas.copy_from_bbox(self.ax.bbox)
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self.canvas.restore_region(self._background)
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if len(index)>0: # do we have a selection
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if len(self.ax.collections)>0:
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if len(self.ax.collections)>0: # remove old linecollection
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self.ax.collections = []
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segs = [self.line_segs[i] for i in index]
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line_coll = LineCollection(segs, colors=(1,0,0,1))
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line_coll.set_clip_box(self.ax.bbox)
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self.ax.update_datalim(line_coll.get_verts(self.ax.transData))
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#draw
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if self.use_blit:
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self.ax.draw_artist(line_coll)
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line_coll.get_clip_box().get_bounds()
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self.canvas.blit()
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else:
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self.ax.add_collection(line_coll)
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self.canvas.draw()
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class ScatterMarkerPlot(Plot):
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"""The ScatterMarkerPlot is faster than regular scatterplot, but
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has no color and size options."""
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@ -596,6 +628,7 @@ class ScatterPlot(Plot):
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assert y1<=y2
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index = scipy.nonzero((xdata>x1) & (xdata<x2) & (ydata>y1) & (ydata<y2))[0]
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ids = self.dataset_1.get_identifiers(self.current_dim, index)
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self.selection_listener(self.current_dim, ids)
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@ -610,7 +643,7 @@ class ScatterPlot(Plot):
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if self._background is None:
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self._background = self.canvas.copy_from_bbox(self.ax.bbox)
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self.canvas.restore_region(self._background)
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lw = scipy.zeros(self.xaxis_data.shape)
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lw = scipy.zeros(self.xaxis_data.shape,'f')
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if len(index)>0:
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lw.put(2.,index)
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self.coll.set_linewidth(lw)
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