""" ASAP plotting class based on matplotlib. """ import sys from re import match import matplotlib from matplotlib.figure import Figure, Text from matplotlib.font_manager import FontProperties from matplotlib.numerix import sqrt from matplotlib import rc, rcParams from asap import rcParams as asaprcParams from matplotlib.ticker import ScalarFormatter from matplotlib.ticker import NullLocator class MyFormatter(ScalarFormatter): def __call__(self, x, pos=None): #last = len(self.locs)-2 if pos==0: return '' else: return ScalarFormatter.__call__(self, x, pos) class asaplotbase: """ ASAP plotting base class based on matplotlib. """ def __init__(self, rows=1, cols=0, title='', size=(8,6), buffering=False): """ Create a new instance of the ASAPlot plotting class. If rows < 1 then a separate call to set_panels() is required to define the panel layout; refer to the doctext for set_panels(). """ self.is_dead = False self.figure = Figure(figsize=size, facecolor='#ddddee') self.canvas = None self.set_title(title) self.subplots = [] if rows > 0: self.set_panels(rows, cols) # Set matplotlib default colour sequence. self.colormap = "green red black cyan magenta orange blue purple yellow pink".split() c = asaprcParams['plotter.colours'] if isinstance(c,str) and len(c) > 0: self.colormap = c.split() self.lsalias = {"line": [1,0], "dashdot": [4,2,1,2], "dashed" : [4,2,4,2], "dotted" : [1,2], "dashdotdot": [4,2,1,2,1,2], "dashdashdot": [4,2,4,2,1,2] } styles = "line dashed dotted dashdot".split() c = asaprcParams['plotter.linestyles'] if isinstance(c,str) and len(c) > 0: styles = c.split() s = [] for ls in styles: if self.lsalias.has_key(ls): s.append(self.lsalias.get(ls)) else: s.append('-') self.linestyles = s self.color = 0; self.linestyle = 0; self.attributes = {} self.loc = 0 self.buffering = buffering def clear(self): """ Delete all lines from the plot. Line numbering will restart from 1. """ for i in range(len(self.lines)): self.delete(i) self.axes.clear() self.color = 0 self.lines = [] def palette(self, color, colormap=None, linestyle=0, linestyles=None): if colormap: if isinstance(colormap,list): self.colormap = colormap elif isinstance(colormap,str): self.colormap = colormap.split() if 0 <= color < len(self.colormap): self.color = color if linestyles: self.linestyles = [] if isinstance(linestyles,list): styles = linestyles elif isinstance(linestyles,str): styles = linestyles.split() for ls in styles: if self.lsalias.has_key(ls): self.linestyles.append(self.lsalias.get(ls)) else: self.linestyles.append(self.lsalias.get('line')) if 0 <= linestyle < len(self.linestyles): self.linestyle = linestyle def delete(self, numbers=None): """ Delete the 0-relative line number, default is to delete the last. The remaining lines are NOT renumbered. """ if numbers is None: numbers = [len(self.lines)-1] if not hasattr(numbers, '__iter__'): numbers = [numbers] for number in numbers: if 0 <= number < len(self.lines): if self.lines[number] is not None: for line in self.lines[number]: line.set_linestyle('None') self.lines[number] = None self.show() def get_line(self): """ Get the current default line attributes. """ return self.attributes def hist(self, x=None, y=None, msk=None, fmt=None, add=None): """ Plot a histogram. N.B. the x values refer to the start of the histogram bin. fmt is the line style as in plot(). """ if x is None: if y is None: return x = range(len(y)) if len(x) != len(y): return l2 = 2*len(x) x2 = range(l2) y2 = range(l2) m2 = range(l2) for i in range(l2): x2[i] = x[i/2] m2[i] = msk[i/2] y2[0] = 0.0 for i in range(1,l2): y2[i] = y[(i-1)/2] self.plot(x2, y2, m2, fmt, add) def hold(self, hold=True): """ Buffer graphics until subsequently released. """ self.buffering = hold def legend(self, loc=None): """ Add a legend to the plot. Any other value for loc else disables the legend: 1: upper right 2: upper left 3: lower left 4: lower right 5: right 6: center left 7: center right 8: lower center 9: upper center 10: center """ if isinstance(loc,int): if 0 > loc > 10: loc = 0 self.loc = loc self.show() def plot(self, x=None, y=None, mask=None, fmt=None, add=None): """ Plot the next line in the current frame using the current line attributes. The ASAPlot graphics window will be mapped and raised. The argument list works a bit like the matlab plot() function. """ if x is None: if y is None: return x = range(len(y)) elif y is None: y = x x = range(len(y)) ax = self.axes s = ax.title.get_size() tsize = s-(self.cols+self.rows)/2 ax.title.set_size(tsize) origx = ax.xaxis.label.get_size() #rcParams['xtick.labelsize'] origy = ax.yaxis.label.get_size() #rcParams['ytick.labelsize'] if self.cols > 1: xfsize = origx-(self.cols)/2 #rc('xtick',labelsize=xfsize) ax.xaxis.label.set_size(xfsize) if self.rows > 1: yfsize = origy-(self.rows)/2 #rc('ytick',labelsize=yfsize) ax.yaxis.label.set_size(yfsize) if mask is None: if fmt is None: line = self.axes.plot(x, y) else: line = self.axes.plot(x, y, fmt) else: segments = [] mask = list(mask) i = 0 while mask[i:].count(1): i += mask[i:].index(1) if mask[i:].count(0): j = i + mask[i:].index(0) else: j = len(mask) segments.append(x[i:j]) segments.append(y[i:j]) i = j line = self.axes.plot(*segments) #rc('xtick',labelsize=origx) #rc('ytick',labelsize=origy) # Add to an existing line? if add is None or len(self.lines) < add < 0: # Don't add. self.lines.append(line) i = len(self.lines) - 1 else: if add == 0: add = len(self.lines) i = add - 1 self.lines[i].extend(line) # Set/reset attributes for the line. gotcolour = False for k, v in self.attributes.iteritems(): if k == 'color': gotcolour = True for segment in self.lines[i]: getattr(segment, "set_%s"%k)(v) if not gotcolour and len(self.colormap): for segment in self.lines[i]: getattr(segment, "set_color")(self.colormap[self.color]) if len(self.colormap) == 1: getattr(segment, "set_dashes")(self.linestyles[self.linestyle]) self.color += 1 if self.color >= len(self.colormap): self.color = 0 if len(self.colormap) == 1: self.linestyle += 1 if self.linestyle >= len(self.linestyles): self.linestyle = 0 self.show() def position(self): """ Use the mouse to get a position from a graph. """ def position_disable(event): self.register('button_press', None) print '%.4f, %.4f' % (event.xdata, event.ydata) print 'Press any mouse button...' self.register('button_press', position_disable) def region(self): """ Use the mouse to get a rectangular region from a plot. The return value is [x0, y0, x1, y1] in world coordinates. """ def region_start(event): height = self.canvas.figure.bbox.height() self.rect = {'fig': None, 'height': height, 'x': event.x, 'y': height - event.y, 'world': [event.xdata, event.ydata, event.xdata, event.ydata]} self.register('button_press', None) self.register('motion_notify', region_draw) self.register('button_release', region_disable) def region_draw(event): self.canvas._tkcanvas.delete(self.rect['fig']) self.rect['fig'] = self.canvas._tkcanvas.create_rectangle( self.rect['x'], self.rect['y'], event.x, self.rect['height'] - event.y) def region_disable(event): self.register('motion_notify', None) self.register('button_release', None) self.canvas._tkcanvas.delete(self.rect['fig']) self.rect['world'][2:4] = [event.xdata, event.ydata] print '(%.2f, %.2f) (%.2f, %.2f)' % (self.rect['world'][0], self.rect['world'][1], self.rect['world'][2], self.rect['world'][3]) self.register('button_press', region_start) # This has to be modified to block and return the result (currently # printed by region_disable) when that becomes possible in matplotlib. return [0.0, 0.0, 0.0, 0.0] def register(self, type=None, func=None): """ Register, reregister, or deregister events of type 'button_press', 'button_release', or 'motion_notify'. The specified callback function should have the following signature: def func(event) where event is an MplEvent instance containing the following data: name # Event name. canvas # FigureCanvas instance generating the event. x = None # x position - pixels from left of canvas. y = None # y position - pixels from bottom of canvas. button = None # Button pressed: None, 1, 2, 3. key = None # Key pressed: None, chr(range(255)), shift, win, or control inaxes = None # Axes instance if cursor within axes. xdata = None # x world coordinate. ydata = None # y world coordinate. For example: def mouse_move(event): print event.xdata, event.ydata a = asaplot() a.register('motion_notify', mouse_move) If func is None, the event is deregistered. Note that in TkAgg keyboard button presses don't generate an event. """ if not self.events.has_key(type): return if func is None: if self.events[type] is not None: # It's not clear that this does anything. self.canvas.mpl_disconnect(self.events[type]) self.events[type] = None # It seems to be necessary to return events to the toolbar. if type == 'motion_notify': self.canvas.mpl_connect(type + '_event', self.figmgr.toolbar.mouse_move) elif type == 'button_press': self.canvas.mpl_connect(type + '_event', self.figmgr.toolbar.press) elif type == 'button_release': self.canvas.mpl_connect(type + '_event', self.figmgr.toolbar.release) else: self.events[type] = self.canvas.mpl_connect(type + '_event', func) def release(self): """ Release buffered graphics. """ self.buffering = False self.show() def save(self, fname=None, orientation=None, dpi=None): """ Save the plot to a file. fname is the name of the output file. The image format is determined from the file suffix; 'png', 'ps', and 'eps' are recognized. If no file name is specified 'yyyymmdd_hhmmss.png' is created in the current directory. """ if fname is None: from datetime import datetime dstr = datetime.now().strftime('%Y%m%d_%H%M%S') fname = 'asap'+dstr+'.png' d = ['png','.ps','eps'] from os.path import expandvars fname = expandvars(fname) if fname[-3:].lower() in d: try: if fname[-3:].lower() == ".ps": from matplotlib import __version__ as mv w = self.figure.figwidth.get() h = self.figure.figheight.get() if orientation is None: # auto oriented if w > h: orientation = 'landscape' else: orientation = 'portrait' a4w = 8.25 a4h = 11.25 ds = None if orientation == 'landscape': ds = min(a4h/w,a4w/h) else: ds = min(a4w/w,a4h/h) ow = ds * w oh = ds * h self.figure.set_figsize_inches((ow,oh)) from matplotlib import __version__ as mv # hack to circument ps bug in eraly versions of mpl if int(mv.split(".")[1]) < 87: self.figure.savefig(fname, orientation=orientation) else: self.figure.savefig(fname, orientation=orientation, papertype="a4") self.figure.set_figsize_inches((w,h)) print 'Written file %s' % (fname) else: if dpi is None: dpi =150 self.figure.savefig(fname,dpi=dpi) print 'Written file %s' % (fname) except IOError, msg: print 'Failed to save %s: Error msg was\n\n%s' % (fname, err) return else: print "Invalid image type. Valid types are:" print "'ps', 'eps', 'png'" def set_axes(self, what=None, *args, **kwargs): """ Set attributes for the axes by calling the relevant Axes.set_*() method. Colour translation is done as described in the doctext for palette(). """ if what is None: return if what[-6:] == 'colour': what = what[:-6] + 'color' newargs = {} for k, v in kwargs.iteritems(): k = k.lower() if k == 'colour': k = 'color' newargs[k] = v getattr(self.axes, "set_%s"%what)(*args, **newargs) self.show() def set_figure(self, what=None, *args, **kwargs): """ Set attributes for the figure by calling the relevant Figure.set_*() method. Colour translation is done as described in the doctext for palette(). """ if what is None: return if what[-6:] == 'colour': what = what[:-6] + 'color' #if what[-5:] == 'color' and len(args): # args = (get_colour(args[0]),) newargs = {} for k, v in kwargs.iteritems(): k = k.lower() if k == 'colour': k = 'color' newargs[k] = v getattr(self.figure, "set_%s"%what)(*args, **newargs) self.show() def set_limits(self, xlim=None, ylim=None): """ Set x-, and y-limits for each subplot. xlim = [xmin, xmax] as in axes.set_xlim(). ylim = [ymin, ymax] as in axes.set_ylim(). """ for s in self.subplots: self.axes = s['axes'] self.lines = s['lines'] oldxlim = list(self.axes.get_xlim()) oldylim = list(self.axes.get_ylim()) if xlim is not None: for i in range(len(xlim)): if xlim[i] is not None: oldxlim[i] = xlim[i] if ylim is not None: for i in range(len(ylim)): if ylim[i] is not None: oldylim[i] = ylim[i] self.axes.set_xlim(oldxlim) self.axes.set_ylim(oldylim) return def set_line(self, number=None, **kwargs): """ Set attributes for the specified line, or else the next line(s) to be plotted. number is the 0-relative number of a line that has already been plotted. If no such line exists, attributes are recorded and used for the next line(s) to be plotted. Keyword arguments specify Line2D attributes, e.g. color='r'. Do import matplotlib help(matplotlib.lines) The set_* methods of class Line2D define the attribute names and values. For non-US usage, "colour" is recognized as synonymous with "color". Set the value to None to delete an attribute. Colour translation is done as described in the doctext for palette(). """ redraw = False for k, v in kwargs.iteritems(): k = k.lower() if k == 'colour': k = 'color' if 0 <= number < len(self.lines): if self.lines[number] is not None: for line in self.lines[number]: getattr(line, "set_%s"%k)(v) redraw = True else: if v is None: del self.attributes[k] else: self.attributes[k] = v if redraw: self.show() def set_panels(self, rows=1, cols=0, n=-1, nplots=-1, ganged=True): """ Set the panel layout. rows and cols, if cols != 0, specify the number of rows and columns in a regular layout. (Indexing of these panels in matplotlib is row- major, i.e. column varies fastest.) cols == 0 is interpreted as a retangular layout that accomodates 'rows' panels, e.g. rows == 6, cols == 0 is equivalent to rows == 2, cols == 3. 0 <= n < rows*cols is interpreted as the 0-relative panel number in the configuration specified by rows and cols to be added to the current figure as its next 0-relative panel number (i). This allows non-regular panel layouts to be constructed via multiple calls. Any other value of n clears the plot and produces a rectangular array of empty panels. The number of these may be limited by nplots. """ if n < 0 and len(self.subplots): self.figure.clear() self.set_title() if rows < 1: rows = 1 if cols <= 0: i = int(sqrt(rows)) if i*i < rows: i += 1 cols = i if i*(i-1) >= rows: i -= 1 rows = i if 0 <= n < rows*cols: i = len(self.subplots) self.subplots.append({}) self.subplots[i]['axes'] = self.figure.add_subplot(rows, cols, n+1) self.subplots[i]['lines'] = [] if i == 0: self.subplot(0) self.rows = 0 self.cols = 0 else: self.subplots = [] if nplots < 1 or rows*cols < nplots: nplots = rows*cols if ganged: hsp,wsp = None,None if rows > 1: hsp = 0.0001 if cols > 1: wsp = 0.0001 self.figure.subplots_adjust(wspace=wsp,hspace=hsp) for i in range(nplots): self.subplots.append({}) self.subplots[i]['axes'] = self.figure.add_subplot(rows, cols, i+1) self.subplots[i]['lines'] = [] if ganged: # Suppress tick labelling for interior subplots. if i <= (rows-1)*cols - 1: if i+cols < nplots: # Suppress x-labels for frames width # adjacent frames self.subplots[i]['axes'].xaxis.set_major_locator(NullLocator()) self.subplots[i]['axes'].xaxis.label.set_visible(False) if i%cols: # Suppress y-labels for frames not in the left column. for tick in self.subplots[i]['axes'].yaxis.majorTicks: tick.label1On = False self.subplots[i]['axes'].yaxis.label.set_visible(False) # disable the first tick of [1:ncol-1] of the last row if (nplots-cols) < i <= nplots-1: self.subplots[i]['axes'].xaxis.set_major_formatter(MyFormatter()) self.rows = rows self.cols = cols self.subplot(0) def set_title(self, title=None): """ Set the title of the plot window. Use the previous title if title is omitted. """ if title is not None: self.title = title self.figure.text(0.5, 0.95, self.title, horizontalalignment='center') def show(self): """ Show graphics dependent on the current buffering state. """ if not self.buffering: if self.loc is not None: for j in range(len(self.subplots)): lines = [] labels = [] i = 0 for line in self.subplots[j]['lines']: i += 1 if line is not None: lines.append(line[0]) lbl = line[0].get_label() if lbl == '': lbl = str(i) labels.append(lbl) if len(lines): self.subplots[j]['axes'].legend(tuple(lines), tuple(labels), self.loc) else: self.subplots[j]['axes'].legend((' ')) def subplot(self, i=None, inc=None): """ Set the subplot to the 0-relative panel number as defined by one or more invokations of set_panels(). """ l = len(self.subplots) if l: if i is not None: self.i = i if inc is not None: self.i += inc self.i %= l self.axes = self.subplots[self.i]['axes'] self.lines = self.subplots[self.i]['lines'] def text(self, *args, **kwargs): """ Add text to the figure. """ self.figure.text(*args, **kwargs) self.show()