20 |
from classification import Classification, ClassGroupSingleton, \ |
from classification import Classification, ClassGroupSingleton, \ |
21 |
ClassGroupRange, ClassGroupProperties |
ClassGroupRange, ClassGroupProperties |
22 |
|
|
23 |
def GenSingletonsFromList(_list, numGroups, ramp): |
def generate_singletons(_list, numGroups, ramp): |
24 |
"""Generate a new classification consisting solely of singletons. |
"""Generate a new classification consisting solely of singletons. |
25 |
|
|
26 |
The resulting classification will consist of at most 'numGroups' |
The resulting classification will consist of at most 'numGroups' |
47 |
|
|
48 |
return clazz |
return clazz |
49 |
|
|
50 |
def GenSingletons(min, max, numGroups, ramp): |
def generate_uniform_distribution(min, max, numGroups, ramp, intStep = False): |
|
|
|
|
clazz = Classification() |
|
|
|
|
|
#step = int((max - min) / float(numGroups)) |
|
|
|
|
|
if numGroups > 0: |
|
|
|
|
|
step = int((max - min + 1) / float(numGroups)) |
|
|
cur_value = min |
|
|
|
|
|
ramp.SetNumGroups(numGroups) |
|
|
|
|
|
for prop in ramp: |
|
|
clazz.AppendGroup(ClassGroupSingleton(cur_value), prop) |
|
|
cur_value += step |
|
|
|
|
|
return clazz |
|
|
|
|
|
def GenUniformDistribution(min, max, numGroups, |
|
|
ramp, intStep = False): |
|
51 |
"""Generate a classification with numGroups range groups |
"""Generate a classification with numGroups range groups |
52 |
each with the same interval. |
each with the same interval. |
53 |
|
|
62 |
|
|
63 |
ramp.SetNumGroups(numGroups) |
ramp.SetNumGroups(numGroups) |
64 |
|
|
|
step = (max - min) / float(numGroups) |
|
|
|
|
|
if intStep: |
|
|
step = int(step) |
|
|
|
|
65 |
cur_min = min |
cur_min = min |
|
cur_max = cur_min + step |
|
66 |
|
|
67 |
i = 0 |
i = 1 |
68 |
end = "[" |
end = "[" |
69 |
for prop in ramp: |
for prop in ramp: |
70 |
|
|
71 |
if i == (numGroups - 1): |
if intStep: |
72 |
|
cur_max = min + int(round((i * (max - min + 1)) / float(numGroups))) |
73 |
|
else: |
74 |
|
cur_max = min + (i * (max - min)) / float(numGroups) |
75 |
|
|
76 |
|
if i == numGroups: |
77 |
cur_max = max |
cur_max = max |
78 |
end = "]" |
end = "]" |
79 |
|
|
80 |
|
if cur_min == cur_max: |
81 |
# this check guards against rounding issues |
range = Range(("[", cur_min, cur_max, "]")) |
82 |
if cur_min != cur_max: |
else: |
83 |
range = Range(("[", cur_min, cur_max, end)) |
range = Range(("[", cur_min, cur_max, end)) |
84 |
clazz.AppendGroup(ClassGroupRange(range, None, prop)) |
|
85 |
|
clazz.AppendGroup(ClassGroupRange(range, None, prop)) |
86 |
|
|
87 |
cur_min = cur_max |
cur_min = cur_max |
|
cur_max += step |
|
88 |
i += 1 |
i += 1 |
89 |
|
|
90 |
return clazz |
return clazz |
91 |
|
|
92 |
|
|
93 |
def GenQuantiles(_list, percents, ramp, _range): |
def generate_quantiles(_list, percents, ramp, _range): |
94 |
"""Generates a Classification which has groups of ranges that |
"""Generates a Classification which has groups of ranges that |
95 |
represent quantiles of _list at the percentages given in percents. |
represent quantiles of _list at the percentages given in percents. |
96 |
Only the values that fall within _range are considered. |
Only the values that fall within _range are considered. |
102 |
_list -- a sort list of values |
_list -- a sort list of values |
103 |
|
|
104 |
percents -- a sorted list of floats in the range 0.0-1.0 which |
percents -- a sorted list of floats in the range 0.0-1.0 which |
105 |
represent the upper bound of each quantile |
represent the upper bound of each quantile. the |
106 |
|
union of all percentiles should be the entire |
107 |
|
range from 0.0-1.0 |
108 |
|
|
109 |
ramp -- an object which implements the CustomRamp interface |
ramp -- an object which implements the CustomRamp interface |
110 |
|
|
111 |
_range -- a Range object |
_range -- a Range object |
112 |
|
|
113 |
|
Raises a Value Error if 'percents' has fewer than two items, or |
114 |
|
does not cover the entire range. |
115 |
""" |
""" |
116 |
|
|
117 |
clazz = Classification() |
clazz = Classification() |
118 |
quantiles = CalculateQuantiles(_list, percents, _range) |
quantiles = calculate_quantiles(_list, percents, _range) |
119 |
adjusted = True |
adjusted = True |
120 |
|
|
121 |
if quantiles is not None: |
if quantiles is not None: |
154 |
|
|
155 |
return (adjusted, clazz) |
return (adjusted, clazz) |
156 |
|
|
157 |
def CalculateQuantiles(_list, percents, _range): |
def GenQuantiles0(_list, percents, ramp, _range): |
158 |
|
"""Same as GenQuantiles, but the first class won't be added to |
159 |
|
the classification. |
160 |
|
|
161 |
|
Returns a tuple (adjusted, Classification, upper_class0) where |
162 |
|
upper_class0 is the highest value inside the first class. |
163 |
|
|
164 |
|
_list -- a sort list of values |
165 |
|
|
166 |
|
percents -- a sorted list of floats in the range 0.0-1.0 which |
167 |
|
represent the upper bound of each quantile. the |
168 |
|
union of all percentiles should be the entire |
169 |
|
range from 0.0-1.0 |
170 |
|
|
171 |
|
ramp -- an object which implements the CustomRamp interface |
172 |
|
|
173 |
|
_range -- a Range object |
174 |
|
|
175 |
|
Raises a Value Error if 'percents' has fewer than two items, or |
176 |
|
does not cover the entire range. |
177 |
|
""" |
178 |
|
|
179 |
|
clazz = Classification() |
180 |
|
quantiles = calculate_quantiles(_list, percents, _range) |
181 |
|
adjusted = True |
182 |
|
|
183 |
|
if quantiles is not None: |
184 |
|
|
185 |
|
numGroups = len(quantiles[3]) - 1 |
186 |
|
|
187 |
|
if numGroups > 0: |
188 |
|
adjusted = quantiles[0] |
189 |
|
|
190 |
|
ramp.SetNumGroups(numGroups) |
191 |
|
|
192 |
|
start, min, endMax, right = _range.GetRange() |
193 |
|
|
194 |
|
class0 = quantiles[3][0] |
195 |
|
min = _list[class0[0]] |
196 |
|
oldp = class0[1] |
197 |
|
i = 1 |
198 |
|
end = "]" |
199 |
|
|
200 |
|
for (q, p), prop in zip(quantiles[3][1:], ramp): |
201 |
|
if i == numGroups: |
202 |
|
max = endMax |
203 |
|
end = right |
204 |
|
else: |
205 |
|
max = _list[q] |
206 |
|
|
207 |
|
group = ClassGroupRange(Range((start, min, max, end)), |
208 |
|
None, prop) |
209 |
|
|
210 |
|
group.SetLabel("%s%% - %s%%" % (round(oldp*100, 2), |
211 |
|
round(p*100, 2))) |
212 |
|
oldp = p |
213 |
|
start = "]" |
214 |
|
min = max |
215 |
|
clazz.AppendGroup(group) |
216 |
|
i += 1 |
217 |
|
|
218 |
|
return (adjusted, clazz, _list[class0[0]]) |
219 |
|
|
220 |
|
|
221 |
|
def calculate_quantiles(_list, percents, _range): |
222 |
"""Calculate quantiles for the given _list of percents from the |
"""Calculate quantiles for the given _list of percents from the |
223 |
sorted list of values that are in range. |
sorted list of values that are in range. |
224 |
|
|
240 |
_list -- a sort list of values |
_list -- a sort list of values |
241 |
|
|
242 |
percents -- a sorted list of floats in the range 0.0-1.0 which |
percents -- a sorted list of floats in the range 0.0-1.0 which |
243 |
represent the upper bound of each quantile |
represent the upper bound of each quantile. the |
244 |
|
union of all percentiles should be the entire |
245 |
|
range from 0.0-1.0 |
246 |
|
|
247 |
_range -- a Range object |
_range -- a Range object |
248 |
|
|
249 |
|
Raises a Value Error if 'percents' has fewer than two items, or |
250 |
|
does not cover the entire range. |
251 |
""" |
""" |
252 |
|
|
253 |
quantiles = [] |
quantiles = [] |
254 |
adjusted = False |
adjusted = False |
255 |
|
|
256 |
if len(percents) != 0: |
if len(percents) <= 1: |
257 |
|
raise ValueError("percents parameter must have more than one item") |
258 |
|
|
259 |
|
if percents[len(percents) - 1] != 1.0: |
260 |
|
raise ValueError("percents does not cover the entire range") |
261 |
|
|
262 |
|
# |
263 |
|
# find what part of the _list range covers |
264 |
|
# |
265 |
|
minIndex = -1 |
266 |
|
maxIndex = -2 |
267 |
|
for i in xrange(0, len(_list), 1): |
268 |
|
if operator.contains(_range, _list[i]): |
269 |
|
minIndex = i |
270 |
|
break |
271 |
|
|
272 |
|
for i in xrange(len(_list)-1, -1, -1): |
273 |
|
if operator.contains(_range, _list[i]): |
274 |
|
maxIndex = i |
275 |
|
break |
276 |
|
|
277 |
|
numValues = maxIndex - minIndex + 1 |
278 |
|
|
279 |
|
if numValues > 0: |
280 |
|
|
281 |
# |
# |
282 |
# find what part of the _list range covers |
# build a list of unique indices into list of where each |
283 |
|
# quantile *should* be. set adjusted if the resulting |
284 |
|
# indices are different |
285 |
# |
# |
286 |
minIndex = -1 |
quantiles = {} |
287 |
maxIndex = -2 |
for p in percents: |
288 |
for i in xrange(0, len(_list), 1): |
index = min(minIndex + int(p*numValues)-1, maxIndex) |
289 |
if operator.contains(_range, _list[i]): |
|
290 |
minIndex = i |
adjusted = adjusted \ |
291 |
break |
or quantiles.has_key(index) \ |
292 |
|
or ((index - minIndex + 1) / float(numValues)) != p |
293 |
|
|
294 |
for i in xrange(len(_list)-1, -1, -1): |
quantiles[index] = 0 |
|
if operator.contains(_range, _list[i]): |
|
|
maxIndex = i |
|
|
break |
|
295 |
|
|
296 |
numValues = maxIndex - minIndex + 1 |
quantiles = quantiles.keys() |
297 |
|
quantiles.sort() |
298 |
|
|
299 |
if numValues > 0: |
# |
300 |
|
# the current quantile index must be strictly greater than |
301 |
|
# the lowerBound |
302 |
|
# |
303 |
|
lowerBound = minIndex - 1 |
304 |
|
|
305 |
|
for qindex in xrange(len(quantiles)): |
306 |
|
if lowerBound >= maxIndex: |
307 |
|
# discard higher quantiles |
308 |
|
quantiles = quantiles[:qindex] |
309 |
|
break |
310 |
|
|
311 |
|
# lowerBound + 1 is always a valid index |
312 |
|
|
313 |
# |
# |
314 |
# build a list of unique indices into list of where each |
# bump up the current quantile index to be a usable index |
315 |
# quantile *should* be. set adjusted if the resulting |
# if it currently falls below the lowerBound |
|
# indices are different |
|
316 |
# |
# |
317 |
quantiles = {} |
if quantiles[qindex] <= lowerBound: |
318 |
for p in percents: |
quantiles[qindex] = lowerBound + 1 |
|
index = min(minIndex + int(p*numValues)-1, maxIndex) |
|
|
|
|
|
adjusted = adjusted \ |
|
|
or quantiles.has_key(index) \ |
|
|
or ((index - minIndex + 1) / float(numValues)) != p |
|
|
|
|
|
quantiles[index] = 0 |
|
319 |
|
|
320 |
quantiles = quantiles.keys() |
listIndex = quantiles[qindex] |
321 |
quantiles.sort() |
value = _list[listIndex] |
322 |
|
|
323 |
# |
# |
324 |
# the current quantile index must be strictly greater than |
# look for similar values around the quantile index |
|
# the lowerBound |
|
325 |
# |
# |
326 |
lowerBound = minIndex - 1 |
lindex = listIndex - 1 |
327 |
|
while lindex > lowerBound and value == _list[lindex]: |
328 |
for qindex in xrange(len(quantiles)): |
lindex -= 1 |
329 |
if lowerBound >= maxIndex: |
lcount = (listIndex - 1) - lindex |
330 |
# discard higher quantiles |
|
331 |
quantiles = quantiles[:qindex] |
rindex = listIndex + 1 |
332 |
break |
while rindex < maxIndex + 1 and value == _list[rindex]: |
333 |
|
rindex += 1 |
334 |
# lowerBound + 1 is always a valid index |
rcount = (listIndex + 1) - rindex |
|
|
|
|
# |
|
|
# bump up the current quantile index to be a usable index |
|
|
# if it currently falls below the lowerBound |
|
|
# |
|
|
if quantiles[qindex] <= lowerBound: |
|
|
quantiles[qindex] = lowerBound + 1 |
|
|
|
|
|
listIndex = quantiles[qindex] |
|
|
value = _list[listIndex] |
|
335 |
|
|
336 |
# |
# |
337 |
# look for similar values around the quantile index |
# adjust the current quantile index based on how many |
338 |
# |
# numbers in the _list are the same as the current value |
339 |
lindex = listIndex - 1 |
# |
340 |
while lindex > lowerBound and value == _list[lindex]: |
newIndex = listIndex |
341 |
lindex -= 1 |
if lcount == rcount: |
342 |
lcount = (listIndex - 1) - lindex |
if lcount != 0: |
343 |
|
# |
344 |
rindex = listIndex + 1 |
# there are an equal number of numbers to the left |
345 |
while rindex < maxIndex + 1 and value == _list[rindex]: |
# and right, try going to the left first unless |
|
rindex += 1 |
|
|
rcount = (listIndex + 1) - rindex |
|
|
|
|
|
# |
|
|
# adjust the current quantile index based on how many |
|
|
# numbers in the _list are the same as the current value |
|
|
# |
|
|
newIndex = listIndex |
|
|
if lcount == rcount: |
|
|
if lcount != 0: |
|
|
# |
|
|
# there are an equal number of numbers to the left |
|
|
# and right, try going to the left first unless |
|
|
# doing so creates an empty quantile. |
|
|
# |
|
|
if lindex != lowerBound: |
|
|
newIndex = lindex |
|
|
else: |
|
|
newIndex = rindex - 1 |
|
|
|
|
|
elif lcount < rcount: |
|
|
# there are fewer items to the left, so |
|
|
# try going to the left first unless |
|
346 |
# doing so creates an empty quantile. |
# doing so creates an empty quantile. |
347 |
|
# |
348 |
if lindex != lowerBound: |
if lindex != lowerBound: |
349 |
newIndex = lindex |
newIndex = lindex |
350 |
else: |
else: |
351 |
newIndex = rindex - 1 |
newIndex = rindex - 1 |
352 |
|
|
353 |
elif rcount < lcount: |
elif lcount < rcount: |
354 |
# there are fewer items to the right, so go to the right |
# there are fewer items to the left, so |
355 |
|
# try going to the left first unless |
356 |
|
# doing so creates an empty quantile. |
357 |
|
if lindex != lowerBound: |
358 |
|
newIndex = lindex |
359 |
|
else: |
360 |
newIndex = rindex - 1 |
newIndex = rindex - 1 |
361 |
|
|
362 |
adjusted = adjusted or newIndex != listIndex |
elif rcount < lcount: |
363 |
|
# there are fewer items to the right, so go to the right |
364 |
|
newIndex = rindex - 1 |
365 |
|
|
366 |
quantiles[qindex] = newIndex |
adjusted = adjusted or newIndex != listIndex |
367 |
lowerBound = quantiles[qindex] |
|
368 |
|
quantiles[qindex] = newIndex |
369 |
|
lowerBound = quantiles[qindex] |
370 |
|
|
371 |
if len(quantiles) == 0: |
if len(quantiles) == 0: |
372 |
return None |
return None |
479 |
color = [color1.red * 255, |
color = [color1.red * 255, |
480 |
color1.green * 255, |
color1.green * 255, |
481 |
color1.blue * 255] |
color1.blue * 255] |
482 |
step = ((color2.red * 255 - color1.red * 255) / numGroups, |
step = ((color2.red * 255 - color1.red * 255) / numGroups, |
483 |
(color2.green * 255 - color1.green * 255) / numGroups, |
(color2.green * 255 - color1.green * 255) / numGroups, |
484 |
(color2.blue * 255 - color1.blue * 255) / numGroups) |
(color2.blue * 255 - color1.blue * 255) / numGroups) |
485 |
|
|
486 |
|
|
487 |
return (color, step) |
return (color, step) |
561 |
prop.SetFill(Color(clr[0], clr[1], clr[2])) |
prop.SetFill(Color(clr[0], clr[1], clr[2])) |
562 |
|
|
563 |
return prop |
return prop |
|
|
|
|
#class Colors16Ramp: |
|
|
# |
|
|
#def __iter__(self): |
|
|
#return self |
|
|
# |
|
|
#def GetRamp(self): |
|
|
#return self |
|
|
# |
|
|
#def SetNumGroups(self, num): |
|
|
#if num < 0: |
|
|
#return False |
|
|
# |
|
|
#self.index = 0 |
|
|
# |
|
|
#return True |
|