#9671: Improve bar chart and histogram support
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Reporter: kcrisman | Owner: jason, was
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-4.7.1
Component: graphics | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Comment(by kcrisman):
Note that we have `np.histogram` if you want as well.
And `TimeSeries.histogram?`
Also here is something random in some code of Willliam's:
{{{
def dist(v, b, left=float(0), right=float(pi)):
"""
We divide the interval between left (default: 0) and
right (default: pi) up into b bins.
For each number in v (which must left and right),
we find which bin it lies in and add this to a counter.
This function then returns the bins and the number of
elements of v that lie in each one.
ALGORITHM: To find the index of the bin that a given
number x lies in, we multiply x by b/length and take the
floor.
"""
length = right - left
normalize = float(b/length)
vals = {}
d = dict([(i,0) for i in range(b)])
for x in v:
n = int(normalize*(float(x)-left))
d[n] += 1
return d, len(v)
def graph(d, b, num=5000, left=float(0), right=float(pi)):
s = Graphics()
left = float(left); right = float(right)
length = right - left
w = length/b
k = 0
for i, n in d.iteritems():
k += n
# ith bin has n objects in it.
s += polygon([(w*i+left,0), (w*(i+1)+left,0), \
(w*(i+1)+left, n/(num*w)), (w*i+left, n/(num*w))],\
rgbcolor=(0,0,0.5))
return s
}}}
The point being that this should be unified.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9671#comment:3>
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