source: trunk/python/asaplotbase.py@ 1142

Last change on this file since 1142 was 1100, checked in by mar637, 18 years ago

removed hardcoding of legend font size

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Line 
1"""
2ASAP plotting class based on matplotlib.
3"""
4
5import sys
6from re import match
7
8import matplotlib
9
10from matplotlib.figure import Figure, Text
11from matplotlib.font_manager import FontProperties
12from matplotlib.numerix import sqrt
13from matplotlib import rc, rcParams
14from asap import rcParams as asaprcParams
15from matplotlib.ticker import ScalarFormatter
16from matplotlib.ticker import NullLocator
17if int(matplotlib.__version__.split(".")[1]) < 87:
18 print "Warning: matplotlib version < 0.87. This might cause errors. Please upgrade."
19
20class MyFormatter(ScalarFormatter):
21 def __call__(self, x, pos=None):
22 #last = len(self.locs)-2
23 if pos==0:
24 return ''
25 else: return ScalarFormatter.__call__(self, x, pos)
26
27class asaplotbase:
28 """
29 ASAP plotting base class based on matplotlib.
30 """
31
32 def __init__(self, rows=1, cols=0, title='', size=(8,6), buffering=False):
33 """
34 Create a new instance of the ASAPlot plotting class.
35
36 If rows < 1 then a separate call to set_panels() is required to define
37 the panel layout; refer to the doctext for set_panels().
38 """
39 self.is_dead = False
40 self.figure = Figure(figsize=size, facecolor='#ddddee')
41 self.canvas = None
42
43 self.set_title(title)
44 self.subplots = []
45 if rows > 0:
46 self.set_panels(rows, cols)
47
48 # Set matplotlib default colour sequence.
49 self.colormap = "green red black cyan magenta orange blue purple yellow pink".split()
50
51 c = asaprcParams['plotter.colours']
52 if isinstance(c,str) and len(c) > 0:
53 self.colormap = c.split()
54
55 self.lsalias = {"line": [1,0],
56 "dashdot": [4,2,1,2],
57 "dashed" : [4,2,4,2],
58 "dotted" : [1,2],
59 "dashdotdot": [4,2,1,2,1,2],
60 "dashdashdot": [4,2,4,2,1,2]
61 }
62
63 styles = "line dashed dotted dashdot".split()
64 c = asaprcParams['plotter.linestyles']
65 if isinstance(c,str) and len(c) > 0:
66 styles = c.split()
67 s = []
68 for ls in styles:
69 if self.lsalias.has_key(ls):
70 s.append(self.lsalias.get(ls))
71 else:
72 s.append('-')
73 self.linestyles = s
74
75 self.color = 0;
76 self.linestyle = 0;
77 self.attributes = {}
78 self.loc = 0
79
80 self.buffering = buffering
81
82 def clear(self):
83 """
84 Delete all lines from the plot. Line numbering will restart from 1.
85 """
86
87 for i in range(len(self.lines)):
88 self.delete(i)
89 self.axes.clear()
90 self.color = 0
91 self.lines = []
92
93 def palette(self, color, colormap=None, linestyle=0, linestyles=None):
94 if colormap:
95 if isinstance(colormap,list):
96 self.colormap = colormap
97 elif isinstance(colormap,str):
98 self.colormap = colormap.split()
99 if 0 <= color < len(self.colormap):
100 self.color = color
101 if linestyles:
102 self.linestyles = []
103 if isinstance(linestyles,list):
104 styles = linestyles
105 elif isinstance(linestyles,str):
106 styles = linestyles.split()
107 for ls in styles:
108 if self.lsalias.has_key(ls):
109 self.linestyles.append(self.lsalias.get(ls))
110 else:
111 self.linestyles.append(self.lsalias.get('line'))
112 if 0 <= linestyle < len(self.linestyles):
113 self.linestyle = linestyle
114
115 def delete(self, numbers=None):
116 """
117 Delete the 0-relative line number, default is to delete the last.
118 The remaining lines are NOT renumbered.
119 """
120
121 if numbers is None: numbers = [len(self.lines)-1]
122
123 if not hasattr(numbers, '__iter__'):
124 numbers = [numbers]
125
126 for number in numbers:
127 if 0 <= number < len(self.lines):
128 if self.lines[number] is not None:
129 for line in self.lines[number]:
130 line.set_linestyle('None')
131 self.lines[number] = None
132 self.show()
133
134 def get_line(self):
135 """
136 Get the current default line attributes.
137 """
138 return self.attributes
139
140
141 def hist(self, x=None, y=None, fmt=None, add=None):
142 """
143 Plot a histogram. N.B. the x values refer to the start of the
144 histogram bin.
145
146 fmt is the line style as in plot().
147 """
148 from matplotlib.numerix import array
149 from matplotlib.numerix.ma import MaskedArray
150 if x is None:
151 if y is None: return
152 x = range(len(y))
153
154 if len(x) != len(y):
155 return
156 l2 = 2*len(x)
157 x2 = range(l2)
158 y2 = range(12)
159 y2 = range(l2)
160 m2 = range(l2)
161 ymsk = y.raw_mask()
162 ydat = y.raw_data()
163 for i in range(l2):
164 x2[i] = x[i/2]
165 m2[i] = ymsk[i/2]
166
167 y2[0] = 0.0
168 for i in range(1,l2):
169 y2[i] = ydat[(i-1)/2]
170
171 self.plot(x2, MaskedArray(y2,mask=m2,copy=0), fmt, add)
172
173
174 def hold(self, hold=True):
175 """
176 Buffer graphics until subsequently released.
177 """
178 self.buffering = hold
179
180
181 def legend(self, loc=None):
182 """
183 Add a legend to the plot.
184
185 Any other value for loc else disables the legend:
186 1: upper right
187 2: upper left
188 3: lower left
189 4: lower right
190 5: right
191 6: center left
192 7: center right
193 8: lower center
194 9: upper center
195 10: center
196
197 """
198 if isinstance(loc, int):
199 self.loc = None
200 if 0 <= loc <= 10: self.loc = loc
201 else:
202 self.loc = None
203 #self.show()
204
205
206 def plot(self, x=None, y=None, fmt=None, add=None):
207 """
208 Plot the next line in the current frame using the current line
209 attributes. The ASAPlot graphics window will be mapped and raised.
210
211 The argument list works a bit like the matlab plot() function.
212 """
213 if x is None:
214 if y is None: return
215 x = range(len(y))
216
217 elif y is None:
218 y = x
219 x = range(len(y))
220 if fmt is None:
221 line = self.axes.plot(x, y)
222 else:
223 line = self.axes.plot(x, y, fmt)
224
225 # Add to an existing line?
226 i = None
227 if add is None or len(self.lines) < add < 0:
228 # Don't add.
229 self.lines.append(line)
230 i = len(self.lines) - 1
231 else:
232 if add == 0: add = len(self.lines)
233 i = add - 1
234 self.lines[i].extend(line)
235
236 # Set/reset attributes for the line.
237 gotcolour = False
238 for k, v in self.attributes.iteritems():
239 if k == 'color': gotcolour = True
240 for segment in self.lines[i]:
241 getattr(segment, "set_%s"%k)(v)
242
243 if not gotcolour and len(self.colormap):
244 for segment in self.lines[i]:
245 getattr(segment, "set_color")(self.colormap[self.color])
246 if len(self.colormap) == 1:
247 getattr(segment, "set_dashes")(self.linestyles[self.linestyle])
248
249 self.color += 1
250 if self.color >= len(self.colormap):
251 self.color = 0
252
253 if len(self.colormap) == 1:
254 self.linestyle += 1
255 if self.linestyle >= len(self.linestyles):
256 self.linestyle = 0
257
258 self.show()
259
260
261 def position(self):
262 """
263 Use the mouse to get a position from a graph.
264 """
265
266 def position_disable(event):
267 self.register('button_press', None)
268 print '%.4f, %.4f' % (event.xdata, event.ydata)
269
270 print 'Press any mouse button...'
271 self.register('button_press', position_disable)
272
273
274 def region(self):
275 """
276 Use the mouse to get a rectangular region from a plot.
277
278 The return value is [x0, y0, x1, y1] in world coordinates.
279 """
280
281 def region_start(event):
282 height = self.canvas.figure.bbox.height()
283 self.rect = {'fig': None, 'height': height,
284 'x': event.x, 'y': height - event.y,
285 'world': [event.xdata, event.ydata,
286 event.xdata, event.ydata]}
287 self.register('button_press', None)
288 self.register('motion_notify', region_draw)
289 self.register('button_release', region_disable)
290
291 def region_draw(event):
292 self.canvas._tkcanvas.delete(self.rect['fig'])
293 self.rect['fig'] = self.canvas._tkcanvas.create_rectangle(
294 self.rect['x'], self.rect['y'],
295 event.x, self.rect['height'] - event.y)
296
297 def region_disable(event):
298 self.register('motion_notify', None)
299 self.register('button_release', None)
300
301 self.canvas._tkcanvas.delete(self.rect['fig'])
302
303 self.rect['world'][2:4] = [event.xdata, event.ydata]
304 print '(%.2f, %.2f) (%.2f, %.2f)' % (self.rect['world'][0],
305 self.rect['world'][1], self.rect['world'][2],
306 self.rect['world'][3])
307
308 self.register('button_press', region_start)
309
310 # This has to be modified to block and return the result (currently
311 # printed by region_disable) when that becomes possible in matplotlib.
312
313 return [0.0, 0.0, 0.0, 0.0]
314
315
316 def register(self, type=None, func=None):
317 """
318 Register, reregister, or deregister events of type 'button_press',
319 'button_release', or 'motion_notify'.
320
321 The specified callback function should have the following signature:
322
323 def func(event)
324
325 where event is an MplEvent instance containing the following data:
326
327 name # Event name.
328 canvas # FigureCanvas instance generating the event.
329 x = None # x position - pixels from left of canvas.
330 y = None # y position - pixels from bottom of canvas.
331 button = None # Button pressed: None, 1, 2, 3.
332 key = None # Key pressed: None, chr(range(255)), shift,
333 win, or control
334 inaxes = None # Axes instance if cursor within axes.
335 xdata = None # x world coordinate.
336 ydata = None # y world coordinate.
337
338 For example:
339
340 def mouse_move(event):
341 print event.xdata, event.ydata
342
343 a = asaplot()
344 a.register('motion_notify', mouse_move)
345
346 If func is None, the event is deregistered.
347
348 Note that in TkAgg keyboard button presses don't generate an event.
349 """
350
351 if not self.events.has_key(type): return
352
353 if func is None:
354 if self.events[type] is not None:
355 # It's not clear that this does anything.
356 self.canvas.mpl_disconnect(self.events[type])
357 self.events[type] = None
358
359 # It seems to be necessary to return events to the toolbar.
360 if type == 'motion_notify':
361 self.canvas.mpl_connect(type + '_event',
362 self.figmgr.toolbar.mouse_move)
363 elif type == 'button_press':
364 self.canvas.mpl_connect(type + '_event',
365 self.figmgr.toolbar.press)
366 elif type == 'button_release':
367 self.canvas.mpl_connect(type + '_event',
368 self.figmgr.toolbar.release)
369
370 else:
371 self.events[type] = self.canvas.mpl_connect(type + '_event', func)
372
373
374 def release(self):
375 """
376 Release buffered graphics.
377 """
378 self.buffering = False
379 self.show()
380
381
382 def save(self, fname=None, orientation=None, dpi=None, papertype=None):
383 """
384 Save the plot to a file.
385
386 fname is the name of the output file. The image format is determined
387 from the file suffix; 'png', 'ps', and 'eps' are recognized. If no
388 file name is specified 'yyyymmdd_hhmmss.png' is created in the current
389 directory.
390 """
391 from asap import rcParams
392 if papertype is None:
393 papertype = rcParams['plotter.papertype']
394 if fname is None:
395 from datetime import datetime
396 dstr = datetime.now().strftime('%Y%m%d_%H%M%S')
397 fname = 'asap'+dstr+'.png'
398
399 d = ['png','.ps','eps']
400
401 from os.path import expandvars
402 fname = expandvars(fname)
403
404 if fname[-3:].lower() in d:
405 try:
406 if fname[-3:].lower() == ".ps":
407 from matplotlib import __version__ as mv
408 w = self.figure.figwidth.get()
409 h = self.figure.figheight.get()
410
411 if orientation is None:
412 # auto oriented
413 if w > h:
414 orientation = 'landscape'
415 else:
416 orientation = 'portrait'
417 from matplotlib.backends.backend_ps import papersize
418 pw,ph = papersize[papertype.lower()]
419 ds = None
420 if orientation == 'landscape':
421 ds = min(ph/w, pw/h)
422 else:
423 ds = min(pw/w, ph/h)
424 ow = ds * w
425 oh = ds * h
426 self.figure.set_figsize_inches((ow, oh))
427 self.figure.savefig(fname, orientation=orientation,
428 papertype=papertype.lower())
429 self.figure.set_figsize_inches((w, h))
430 print 'Written file %s' % (fname)
431 else:
432 if dpi is None:
433 dpi =150
434 self.figure.savefig(fname,dpi=dpi)
435 print 'Written file %s' % (fname)
436 except IOError, msg:
437 print 'Failed to save %s: Error msg was\n\n%s' % (fname, err)
438 return
439 else:
440 print "Invalid image type. Valid types are:"
441 print "'ps', 'eps', 'png'"
442
443
444 def set_axes(self, what=None, *args, **kwargs):
445 """
446 Set attributes for the axes by calling the relevant Axes.set_*()
447 method. Colour translation is done as described in the doctext
448 for palette().
449 """
450
451 if what is None: return
452 if what[-6:] == 'colour': what = what[:-6] + 'color'
453
454 newargs = {}
455
456 for k, v in kwargs.iteritems():
457 k = k.lower()
458 if k == 'colour': k = 'color'
459 newargs[k] = v
460
461 getattr(self.axes, "set_%s"%what)(*args, **newargs)
462
463 self.show()
464
465
466 def set_figure(self, what=None, *args, **kwargs):
467 """
468 Set attributes for the figure by calling the relevant Figure.set_*()
469 method. Colour translation is done as described in the doctext
470 for palette().
471 """
472
473 if what is None: return
474 if what[-6:] == 'colour': what = what[:-6] + 'color'
475 #if what[-5:] == 'color' and len(args):
476 # args = (get_colour(args[0]),)
477
478 newargs = {}
479 for k, v in kwargs.iteritems():
480 k = k.lower()
481 if k == 'colour': k = 'color'
482 newargs[k] = v
483
484 getattr(self.figure, "set_%s"%what)(*args, **newargs)
485 self.show()
486
487
488 def set_limits(self, xlim=None, ylim=None):
489 """
490 Set x-, and y-limits for each subplot.
491
492 xlim = [xmin, xmax] as in axes.set_xlim().
493 ylim = [ymin, ymax] as in axes.set_ylim().
494 """
495 for s in self.subplots:
496 self.axes = s['axes']
497 self.lines = s['lines']
498 oldxlim = list(self.axes.get_xlim())
499 oldylim = list(self.axes.get_ylim())
500 if xlim is not None:
501 for i in range(len(xlim)):
502 if xlim[i] is not None:
503 oldxlim[i] = xlim[i]
504 if ylim is not None:
505 for i in range(len(ylim)):
506 if ylim[i] is not None:
507 oldylim[i] = ylim[i]
508 self.axes.set_xlim(oldxlim)
509 self.axes.set_ylim(oldylim)
510 return
511
512
513 def set_line(self, number=None, **kwargs):
514 """
515 Set attributes for the specified line, or else the next line(s)
516 to be plotted.
517
518 number is the 0-relative number of a line that has already been
519 plotted. If no such line exists, attributes are recorded and used
520 for the next line(s) to be plotted.
521
522 Keyword arguments specify Line2D attributes, e.g. color='r'. Do
523
524 import matplotlib
525 help(matplotlib.lines)
526
527 The set_* methods of class Line2D define the attribute names and
528 values. For non-US usage, "colour" is recognized as synonymous with
529 "color".
530
531 Set the value to None to delete an attribute.
532
533 Colour translation is done as described in the doctext for palette().
534 """
535
536 redraw = False
537 for k, v in kwargs.iteritems():
538 k = k.lower()
539 if k == 'colour': k = 'color'
540
541 if 0 <= number < len(self.lines):
542 if self.lines[number] is not None:
543 for line in self.lines[number]:
544 getattr(line, "set_%s"%k)(v)
545 redraw = True
546 else:
547 if v is None:
548 del self.attributes[k]
549 else:
550 self.attributes[k] = v
551
552 if redraw: self.show()
553
554
555 def set_panels(self, rows=1, cols=0, n=-1, nplots=-1, ganged=True):
556 """
557 Set the panel layout.
558
559 rows and cols, if cols != 0, specify the number of rows and columns in
560 a regular layout. (Indexing of these panels in matplotlib is row-
561 major, i.e. column varies fastest.)
562
563 cols == 0 is interpreted as a retangular layout that accomodates
564 'rows' panels, e.g. rows == 6, cols == 0 is equivalent to
565 rows == 2, cols == 3.
566
567 0 <= n < rows*cols is interpreted as the 0-relative panel number in
568 the configuration specified by rows and cols to be added to the
569 current figure as its next 0-relative panel number (i). This allows
570 non-regular panel layouts to be constructed via multiple calls. Any
571 other value of n clears the plot and produces a rectangular array of
572 empty panels. The number of these may be limited by nplots.
573 """
574 if n < 0 and len(self.subplots):
575 self.figure.clear()
576 self.set_title()
577
578 if rows < 1: rows = 1
579
580 if cols <= 0:
581 i = int(sqrt(rows))
582 if i*i < rows: i += 1
583 cols = i
584
585 if i*(i-1) >= rows: i -= 1
586 rows = i
587
588 if 0 <= n < rows*cols:
589 i = len(self.subplots)
590 self.subplots.append({})
591
592 self.subplots[i]['axes'] = self.figure.add_subplot(rows,
593 cols, n+1)
594 self.subplots[i]['lines'] = []
595
596 if i == 0: self.subplot(0)
597
598 self.rows = 0
599 self.cols = 0
600
601 else:
602 self.subplots = []
603
604 if nplots < 1 or rows*cols < nplots:
605 nplots = rows*cols
606 if ganged:
607 hsp,wsp = None,None
608 if rows > 1: hsp = 0.0001
609 if cols > 1: wsp = 0.0001
610 self.figure.subplots_adjust(wspace=wsp,hspace=hsp)
611 for i in range(nplots):
612 self.subplots.append({})
613 self.subplots[i]['axes'] = self.figure.add_subplot(rows,
614 cols, i+1)
615 self.subplots[i]['lines'] = []
616
617 if ganged:
618 # Suppress tick labelling for interior subplots.
619 if i <= (rows-1)*cols - 1:
620 if i+cols < nplots:
621 # Suppress x-labels for frames width
622 # adjacent frames
623 self.subplots[i]['axes'].xaxis.set_major_locator(NullLocator())
624 self.subplots[i]['axes'].xaxis.label.set_visible(False)
625 if i%cols:
626 # Suppress y-labels for frames not in the left column.
627 for tick in self.subplots[i]['axes'].yaxis.majorTicks:
628 tick.label1On = False
629 self.subplots[i]['axes'].yaxis.label.set_visible(False)
630 # disable the first tick of [1:ncol-1] of the last row
631 if (nplots-cols) < i <= nplots-1:
632 self.subplots[i]['axes'].xaxis.set_major_formatter(MyFormatter())
633 self.rows = rows
634 self.cols = cols
635 self.subplot(0)
636
637 def set_title(self, title=None):
638 """
639 Set the title of the plot window. Use the previous title if title is
640 omitted.
641 """
642 if title is not None:
643 self.title = title
644
645 self.figure.text(0.5, 0.95, self.title, horizontalalignment='center')
646
647
648 def show(self):
649 """
650 Show graphics dependent on the current buffering state.
651 """
652 if not self.buffering:
653 if self.loc is not None:
654 for sp in self.subplots:
655 lines = []
656 labels = []
657 i = 0
658 for line in sp['lines']:
659 i += 1
660 if line is not None:
661 lines.append(line[0])
662 lbl = line[0].get_label()
663 if lbl == '':
664 lbl = str(i)
665 labels.append(lbl)
666
667 if len(lines):
668 sp['axes'].legend(tuple(lines), tuple(labels),
669 self.loc)
670## ,prop=FontProperties(size=lsiz) )
671 else:
672 sp['axes'].legend((' '))
673
674 from matplotlib.artist import setp
675 xts = rcParams['xtick.labelsize']-(self.cols)/2
676 yts = rcParams['ytick.labelsize']-(self.rows)/2
677 for sp in self.subplots:
678 ax = sp['axes']
679 s = ax.title.get_size()
680 tsize = s-(self.cols+self.rows)
681 ax.title.set_size(tsize)
682 setp(ax.get_xticklabels(), fontsize=xts)
683 setp(ax.get_yticklabels(), fontsize=yts)
684 origx = rcParams['axes.labelsize'] #ax.xaxis.label.get_size()
685 origy = rcParams['axes.labelsize'] #ax.yaxis.label.get_size()
686 off = 0
687 if self.cols > 1: off = self.cols
688 xfsize = origx-off
689 #rc('xtick',labelsize=xfsize)
690 ax.xaxis.label.set_size(xfsize)
691 off = 0
692 if self.rows > 1: off = self.rows
693 yfsize = origy-off
694 #rc('ytick',labelsize=yfsize)
695 ax.yaxis.label.set_size(yfsize)
696
697 def subplot(self, i=None, inc=None):
698 """
699 Set the subplot to the 0-relative panel number as defined by one or
700 more invokations of set_panels().
701 """
702 l = len(self.subplots)
703 if l:
704 if i is not None:
705 self.i = i
706
707 if inc is not None:
708 self.i += inc
709
710 self.i %= l
711 self.axes = self.subplots[self.i]['axes']
712 self.lines = self.subplots[self.i]['lines']
713
714
715 def text(self, *args, **kwargs):
716 """
717 Add text to the figure.
718 """
719 self.figure.text(*args, **kwargs)
720 self.show()
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