/usr/lib/python2.7/dist-packages/scitools/aplotter.py is in python-scitools 0.9.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 | """
aplotter is a Python module for drawing graphs in pure ASCII format.
This allows graphs to be included in doc strings (Python programs)
or as illustrations in programs in any computer language.
The module offers a function
plot(x, y, draw_axis=True, plot_slope=True, plot_labels=False, dot='*',
min_x=None, max_x=None, min_y=None, max_y=None,
output=sys.stdout)
where x and y are sequences of x and y data for a curve.
Axes are automatically calculated from the x and y data if not
min_x, max_x, min_y or max_y are given.
Multiple curves in the plot is not supported.
Here are examples on various plot commands:
>>> from scitools.aplotter import plot
>>> from numpy import linspace, exp, cos, pi
>>> x = linspace(-2, 2, 81)
>>> y = exp(-0.5*x**2)*cos(pi*x)
>>> plot(x, y)
|
-+1
// |\\
/ | \
/ | \
/ | \
/ | \
/ | \
/ | \
/ | \
-------\ / | \ -------*
---+-------\\-----------------/---------+--------\-----------------//-------+---
-2 \ / | \ / +2
\\ / | \ //
\ / | \ /
\\ / | \ //
\ / | \ /
\ // | \- //
---- -0.63 ---/
|
>>>
>>> plot(x, y, draw_axes=False)
-+1
// \\
/ \
/ \
/ \
/ \
/ \
/ \
/ \
-------\ / \ -------*
+ \\ / \ // +
-2 \ / \ / +2
\\ / \ //
\ / \ /
\\ / \ //
\ / \ /
\ // \- //
---- -0.63 ---/
>>>
>>> # plot symbols (the dot argument) at data points:
>>> plot(x, y, plot_slope=False)
|
*+1
** |**
* | *
* | *
|
* | *
* | *
* | *
|
******** * | * ********
---+-------**-----------------*---------+--------*-----------------**-------+---
-2 * | * +2
** * | * **
* * | * *
** * | * **
* * | * *
* ** | ** **
**** -0.63 ****
|
>>>
>>> # drop axis labels:
>>> plot(x, y, plot_labels=False)
|
-\
// |\\
/ | \
/ | \
/ | \
/ | \
/ | \
/ | \
/ | \
-------\ / | \ -------*
-----------\\-----------------/---------+--------\-----------------//-----------
\ / | \ /
\\ / | \ //
\ / | \ /
\\ / | \ //
\ / | \ /
\ // | \- //
---- | ---/
|
>>>
>>> plot(x, y, dot='o', plot_slope=False)
|
o+1
oo |oo
o | o
o | o
|
o | o
o | o
o | o
|
oooooooo o | o oooooooo
---+-------oo-----------------o---------+--------o-----------------oo-------+---
-2 o | o +2
oo o | o oo
o o | o o
oo o | o oo
o o | o o
o oo | oo oo
oooo -0.63 oooo
|
>>>
>>> # store plot in a string:
>>> p = plot(x, y, output=str)
>>> print p
|
-+1
// |\\
/ | \
/ | \
/ | \
/ | \
/ | \
/ | \
/ | \
-------\ / | \ -------*
---+-------\\-----------------/---------+--------\-----------------//-------+---
-2 \ / | \ / +2
\\ / | \ //
\ / | \ /
\\ / | \ //
\ / | \ /
\ // | \- //
---- -0.63 ---/
|
"""
#-----------------------------------------------
#aplotter.py - ascii art function plotter
#Copyright (c) 2006, Imri Goldberg
#All rights reserved.
#Additional documentation and examples by Hans Petter Langtangen.
#
#Redistribution and use in source and binary forms,
#with or without modification, are permitted provided
#that the following conditions are met:
#
# * Redistributions of source code must retain the
# above copyright notice, this list of conditions
# and the following disclaimer.
# * Redistributions in binary form must reproduce the
# above copyright notice, this list of conditions
# and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * Neither the name of the <ORGANIZATION> nor the names of
# its contributors may be used to endorse or promote products
# derived from this software without specific prior written permission.
#
#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
#AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
#LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
#DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
#SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
#CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#-----------------------------------------------
import math, sys
EPSILON = 0.000001
def transposed(mat):
result = []
for i in xrange(len(mat[0])):
result.append([x[i] for x in mat])
return result
def y_reversed(mat):
result = []
for i in range(len(mat)):
result.append(list(reversed(mat[i])))
return result
def sign(x):
if 0<x:
return 1
if 0 == x:
return 0
return -1
class Plotter(object):
class PlotData(object):
def __init__(self, x_size, y_size, min_x, max_x, min_y, max_y, x_mod, y_mod):
self.x_size = x_size
self.y_size = y_size
self.min_x = min_x
self.max_x = max_x
self.min_y = min_y
self.max_y = max_y
self.x_mod = x_mod
self.y_mod = y_mod
self.x_step = float(max_x - min_x)/float(self.x_size)
self.y_step = float(max_y - min_y)/float(self.y_size)
self.inv_x_step = 1/self.x_step
self.inv_y_step = 1/self.y_step
self.ratio = self.y_step / self.x_step
def __repr__(self):
s = "size: %s, bl: %s, tr: %s, step: %s" % ((self.x_size, self.y_size), (self.min_x, self.min_y), (self.max_x, self.max_y),
(self.x_step, self.y_step))
return s
def __init__(self, **kwargs):
self.x_size = kwargs.get("x_size", 80)
self.y_size = kwargs.get("y_size", 20)
self.will_draw_axes = kwargs.get("draw_axes", True)
self.new_line = kwargs.get("newline", "\n")
self.dot = kwargs.get("dot", "*")
self.plot_slope = kwargs.get("plot_slope", True)
self.x_margin = kwargs.get("x_margin", 0.05)
self.y_margin = kwargs.get("y_margin", 0.1)
self.will_plot_labels = kwargs.get("plot_labels", True)
@staticmethod
def get_symbol_by_slope(slope, default_symbol):
draw_symbol = default_symbol
if slope > math.tan(3*math.pi/8):
draw_symbol = "|"
elif slope > math.tan(math.pi/8) and slope < math.tan(3*math.pi/8):
draw_symbol = "/"
elif abs(slope) < math.tan(math.pi/8):
draw_symbol = "-"
elif slope < math.tan(-math.pi/8) and slope > math.tan(-3*math.pi/8):
draw_symbol = "\\"
elif slope < math.tan(-3*math.pi/8):
draw_symbol = "|"
return draw_symbol
def plot_labels(self, output_buffer, plot_data):
if plot_data.y_size < 2:
return
margin_factor = 1
do_plot_x_label = True
do_plot_y_label = True
x_str = "%+g"
if plot_data.x_size < 16:
do_plot_x_label = False
elif plot_data.x_size < 23:
x_str = "%+.2g"
y_str = "%+g"
if plot_data.x_size < 8:
do_plot_y_label = False
elif plot_data.x_size < 11:
y_str = "%+.2g"
act_min_x = (plot_data.min_x + plot_data.x_mod*margin_factor)
act_max_x = (plot_data.max_x - plot_data.x_mod*margin_factor)
act_min_y = (plot_data.min_y + plot_data.y_mod*margin_factor)
act_max_y = (plot_data.max_y - plot_data.y_mod*margin_factor)
if abs(act_min_x) < 1:
min_x_str = "%+.2g" % act_min_x
else:
min_x_str = x_str % act_min_x
if abs(act_max_x) < 1:
max_x_str = "%+.2g" % act_max_x
else:
max_x_str = x_str % act_max_x
if abs(act_min_y) < 1:
min_y_str = "%+.2g" % act_min_y
else:
min_y_str = y_str % act_min_y
if abs(act_max_y) < 1:
max_y_str = "%+.2g" % act_max_y
else:
max_y_str = y_str % act_max_y
min_x_coord = self.get_coord(act_min_x,plot_data.min_x,plot_data.x_step)
max_x_coord = self.get_coord(act_max_x,plot_data.min_x,plot_data.x_step)
min_y_coord = self.get_coord(act_min_y,plot_data.min_y,plot_data.y_step)
max_y_coord = self.get_coord(act_max_y,plot_data.min_y,plot_data.y_step)
#print plot_data
y_zero_coord = self.get_coord(0, plot_data.min_y, plot_data.y_step)
#if plot_data.min_x < 0 and plot_data.max_x > 0:
x_zero_coord = self.get_coord(0, plot_data.min_x, plot_data.x_step)
#else:
#pass
output_buffer[x_zero_coord][min_y_coord] = "+"
output_buffer[x_zero_coord][max_y_coord] = "+"
output_buffer[min_x_coord][y_zero_coord] = "+"
output_buffer[max_x_coord][y_zero_coord] = "+"
if do_plot_x_label:
for i,c in enumerate(min_x_str):
output_buffer[min_x_coord+i][y_zero_coord-1] = c
for i,c in enumerate(max_x_str):
output_buffer[max_x_coord+i-len(max_x_str)][y_zero_coord-1] = c
if do_plot_y_label:
for i,c in enumerate(max_y_str):
output_buffer[x_zero_coord+i][max_y_coord] = c
for i,c in enumerate(min_y_str):
output_buffer[x_zero_coord+i][min_y_coord] = c
def plot_data(self, xy_seq, output_buffer, plot_data):
if self.plot_slope:
xy_seq = list(xy_seq)
#sort according to the x coord
xy_seq.sort(key = lambda c: c[0])
prev_p = xy_seq[0]
e_xy_seq = enumerate(xy_seq)
e_xy_seq.next()
for i,(x,y) in e_xy_seq:
draw_symbol = self.dot
line_drawn = self.plot_line(prev_p, (x,y), output_buffer, plot_data)
prev_p = (x,y)
if not line_drawn:
if i > 0 and i < len(xy_seq)-1:
px,py = xy_seq[i-1]
nx,ny = xy_seq[i+1]
if abs(nx-px) > EPSILON:
slope = (1.0/plot_data.ratio)*(ny-py)/(nx-px)
draw_symbol = self.get_symbol_by_slope(slope, draw_symbol)
if x < plot_data.min_x or x >= plot_data.max_x or y < plot_data.min_y or y >= plot_data.max_y:
continue
x_coord = self.get_coord(x, plot_data.min_x, plot_data.x_step)
y_coord = self.get_coord(y, plot_data.min_y, plot_data.y_step)
if x_coord >= 0 and x_coord < len(output_buffer) and y_coord >= 0 and y_coord < len(output_buffer[0]):
if self.draw_axes:
if y_coord == self.get_coord(0, plot_data.min_y, plot_data.y_step) and draw_symbol == "-":
draw_symbol = "="
output_buffer[x_coord][y_coord] = draw_symbol
else:
for x,y in xy_seq:
if x < plot_data.min_x or x >= plot_data.max_x or y < plot_data.min_y or y >= plot_data.max_y:
continue
x_coord = self.get_coord(x, plot_data.min_x, plot_data.x_step)
y_coord = self.get_coord(y, plot_data.min_y, plot_data.y_step)
if x_coord >= 0 and x_coord < len(output_buffer) and y_coord > 0 and y_coord < len(output_buffer[0]):
output_buffer[x_coord][y_coord] = self.dot
def plot_line(self, start, end, output_buffer, plot_data):
start_coord = self.get_coord(start[0], plot_data.min_x, plot_data.x_step), self.get_coord(start[1], plot_data.min_y, plot_data.y_step)
end_coord = self.get_coord(end[0], plot_data.min_x, plot_data.x_step), self.get_coord(end[1], plot_data.min_y, plot_data.y_step)
x0,y0 = start_coord
x1,y1 = end_coord
if (x0,y0) == (x1,y1):
return True
clipped_line = clip_line(start, end, (plot_data.min_x, plot_data.min_y), (plot_data.max_x, plot_data.max_y))
if clipped_line != None:
start,end = clipped_line
else:
return False
start_coord = self.get_coord(start[0], plot_data.min_x, plot_data.x_step), self.get_coord(start[1], plot_data.min_y, plot_data.y_step)
end_coord = self.get_coord(end[0], plot_data.min_x, plot_data.x_step), self.get_coord(end[1], plot_data.min_y, plot_data.y_step)
x0,y0 = start_coord
x1,y1 = end_coord
if (x0,y0) == (x1,y1):
return True
x_zero_coord = self.get_coord(0, plot_data.min_x, plot_data.x_step)
y_zero_coord = self.get_coord(0, plot_data.min_y, plot_data.y_step)
if start[0]-end[0] == 0:
draw_symbol = "|"
else:
slope = (1.0/plot_data.ratio)*(end[1]-start[1])/(end[0]-start[0])
draw_symbol = self.get_symbol_by_slope(slope, self.dot)
try:
delta = x1-x0, y1-y0
if abs(delta[0])>abs(delta[1]):
s = sign(delta[0])
slope = float(delta[1])/delta[0]
for i in range(0,abs(int(delta[0]))):
cur_draw_symbol = draw_symbol
x = i*s
cur_y = int(y0+slope*x)
if self.draw_axes and cur_y == y_zero_coord and draw_symbol == "-":
cur_draw_symbol = "="
output_buffer[x0+x][cur_y] = cur_draw_symbol
else:
s = sign(delta[1])
slope = float(delta[0])/delta[1]
for i in range(0,abs(int(delta[1]))):
y = i*s
cur_draw_symbol = draw_symbol
cur_y = y0+y
if self.draw_axes and cur_y == y_zero_coord and draw_symbol == "-":
cur_draw_symbol = "="
output_buffer[int(x0+slope*y)][cur_y] = cur_draw_symbol
except Exception, e:
print start, end
print start_coord, end_coord
print plot_data
raise e
return False
def plot_single(self, seq, min_x = None, max_x = None, min_y = None, max_y = None):
return self.plot_double(range(len(seq)),seq, min_x, max_x, min_y, max_y)
def plot_double(self, x_seq, y_seq, min_x = None, max_x = None, min_y = None, max_y = None):
if min_x == None:
min_x = min(x_seq)
if max_x == None:
max_x = max(x_seq)
if min_y == None:
min_y = min(y_seq)
if max_y == None:
max_y = max(y_seq)
if max_y == min_y:
max_y += 1
x_mod = (max_x-min_x)*self.x_margin
y_mod = (max_y-min_y)*self.y_margin
min_x-=x_mod
max_x+=x_mod
min_y-=y_mod
max_y+=y_mod
plot_data = self.PlotData(self.x_size, self.y_size, min_x, max_x, min_y, max_y, x_mod, y_mod)
output_buffer = [[" "]*self.y_size for i in range(self.x_size)]
if self.will_draw_axes:
self.draw_axes(output_buffer, plot_data)
self.plot_data(zip(x_seq, y_seq), output_buffer, plot_data)
if self.will_plot_labels:
self.plot_labels(output_buffer, plot_data)
trans_result = transposed(y_reversed(output_buffer))
result = self.new_line.join(["".join(row) for row in trans_result])
return result
def draw_axes(self, output_buffer, plot_data):
draw_x = False
draw_y = False
if plot_data.min_x <= 0 and plot_data.max_x > 0:
draw_y = True
zero_x = self.get_coord(0, plot_data.min_x, plot_data.x_step)
for y in xrange(plot_data.y_size):
output_buffer[zero_x][y] = "|"
if plot_data.min_y <= 0 and plot_data.max_y > 0:
draw_x = True
zero_y = self.get_coord(0, plot_data.min_y, plot_data.y_step)
for x in xrange(plot_data.x_size):
output_buffer[x][zero_y] = "-"
if draw_x and draw_y:
output_buffer[zero_x][zero_y] = "+"
@staticmethod
def get_coord(val, min, step):
result = int((val - min)/step)
return result
def clip_line(line_pt_1, line_pt_2, rect_bottom_left, rect_top_right):
ts = [0.0,1.0]
if line_pt_1[0] == line_pt_2[0]:
return ((line_pt_1[0], max(min(line_pt_1[1], line_pt_2[1]), rect_bottom_left[1])),
(line_pt_1[0], min(max(line_pt_1[1], line_pt_2[1]), rect_top_right[1])))
if line_pt_1[1] == line_pt_2[1]:
return ((max(min(line_pt_1[0], line_pt_2[0]), rect_bottom_left[0]), line_pt_1[1]),
(min(max(line_pt_1[0], line_pt_2[0]), rect_top_right[0]), line_pt_1[1]))
if ((rect_bottom_left[0] <= line_pt_1[0] and line_pt_1[0] < rect_top_right[0]) and
(rect_bottom_left[1] <= line_pt_1[1] and line_pt_1[1] < rect_top_right[1]) and
(rect_bottom_left[0] <= line_pt_2[0] and line_pt_2[0] < rect_top_right[0]) and
(rect_bottom_left[1] <= line_pt_2[1] and line_pt_2[1] < rect_top_right[1])):
return line_pt_1, line_pt_2
ts.append( float(rect_bottom_left[0]-line_pt_1[0])/(line_pt_2[0]-line_pt_1[0]) )
ts.append( float(rect_top_right[0]-line_pt_1[0])/(line_pt_2[0]-line_pt_1[0]) )
ts.append( float(rect_bottom_left[1]-line_pt_1[1])/(line_pt_2[1]-line_pt_1[1]) )
ts.append( float(rect_top_right[1]-line_pt_1[1])/(line_pt_2[1]-line_pt_1[1]) )
ts.sort()
if ts[2] < 0 or ts[2] >= 1 or ts[3] < 0 or ts[2]>= 1:
return None
result = [(pt_1 + t*(pt_2-pt_1)) for t in (ts[2],ts[3]) for (pt_1, pt_2) in zip(line_pt_1, line_pt_2)]
return (result[0],result[1]), (result[2], result[3])
def plot(*args,**flags):
limit_flags_names = set(["min_x","min_y","max_x","max_y"])
limit_flags = dict([(n,flags[n]) for n in limit_flags_names & set(flags)])
settting_flags = dict([(n,flags[n]) for n in set(flags) - limit_flags_names])
output = flags.get('output', sys.stdout)
if len(args) == 1:
p = Plotter(**settting_flags)
r = p.plot_single(args[0],**limit_flags)
elif len(args) == 2:
p = Plotter(**settting_flags)
r = p.plot_double(args[0],args[1],**limit_flags)
else:
raise NotImplementedError("can't draw multiple graphs yet")
if output == sys.stdout:
print r
else:
return r
__all__ = ["Plotter","plot"]
def _demo():
from numpy import linspace, exp, sin, pi
x = linspace(-2, 2, 31)
y = exp(-0.5*x**2)*sin(2*pi*x)
data = """
from numpy import linspace, exp, sin, pi
x = linspace(-2, 2, 31)
y = exp(-0.5*x**2)*sin(2*pi*x)
"""
cmd = ["plot(x, y)",
"plot(x, y, draw_axes=False)",
"plot(x, y, plot_slope=False)",
"plot(x, y, plot_labels=False)",
"plot(x, y, dot='o', plot_slope=False)",
"p = plot(x, y, output=str)",
"print p"
]
print data
for c in cmd:
print '\n\n', c
exec(c)
if __name__ == '__main__':
_demo()
|