Deming's funnel: Difference between revisions
Content added Content deleted
(Undo revision 160866 by DanpragerHi Danprager, we usually wait for around 4 languages before dropping the draft status. Good subject.) |
|||
Line 21: | Line 21: | ||
=={{header|Python}}== |
=={{header|Python}}== |
||
{{trans|racket}} |
|||
<lang python>import math |
|||
dxs = [-0.533, 0.27, 0.859, -0.043, -0.205, -0.127, -0.071, 0.275, 1.251, |
|||
-0.231, -0.401, 0.269, 0.491, 0.951, 1.15, 0.001, -0.382, 0.161, 0.915, |
|||
2.08, -2.337, 0.034, -0.126, 0.014, 0.709, 0.129, -1.093, -0.483, -1.193, |
|||
0.02, -0.051, 0.047, -0.095, 0.695, 0.34, -0.182, 0.287, 0.213, -0.423, |
|||
-0.021, -0.134, 1.798, 0.021, -1.099, -0.361, 1.636, -1.134, 1.315, 0.201, |
|||
0.034, 0.097, -0.17, 0.054, -0.553, -0.024, -0.181, -0.7, -0.361, -0.789, |
|||
0.279, -0.174, -0.009, -0.323, -0.658, 0.348, -0.528, 0.881, 0.021, -0.853, |
|||
0.157, 0.648, 1.774, -1.043, 0.051, 0.021, 0.247, -0.31, 0.171, 0.0, 0.106, |
|||
0.024, -0.386, 0.962, 0.765, -0.125, -0.289, 0.521, 0.017, 0.281, -0.749, |
|||
-0.149, -2.436, -0.909, 0.394, -0.113, -0.598, 0.443, -0.521, -0.799, |
|||
0.087] |
|||
dys = [0.136, 0.717, 0.459, -0.225, 1.392, 0.385, 0.121, -0.395, 0.49, -0.682, |
|||
-0.065, 0.242, -0.288, 0.658, 0.459, 0.0, 0.426, 0.205, -0.765, -2.188, |
|||
-0.742, -0.01, 0.089, 0.208, 0.585, 0.633, -0.444, -0.351, -1.087, 0.199, |
|||
0.701, 0.096, -0.025, -0.868, 1.051, 0.157, 0.216, 0.162, 0.249, -0.007, |
|||
0.009, 0.508, -0.79, 0.723, 0.881, -0.508, 0.393, -0.226, 0.71, 0.038, |
|||
-0.217, 0.831, 0.48, 0.407, 0.447, -0.295, 1.126, 0.38, 0.549, -0.445, |
|||
-0.046, 0.428, -0.074, 0.217, -0.822, 0.491, 1.347, -0.141, 1.23, -0.044, |
|||
0.079, 0.219, 0.698, 0.275, 0.056, 0.031, 0.421, 0.064, 0.721, 0.104, |
|||
-0.729, 0.65, -1.103, 0.154, -1.72, 0.051, -0.385, 0.477, 1.537, -0.901, |
|||
0.939, -0.411, 0.341, -0.411, 0.106, 0.224, -0.947, -1.424, -0.542, -1.032] |
|||
def funnel(dxs, dys, rule): |
|||
x, y, rxs, rys = 0, 0, [], [] |
|||
for dx, dy in zip(dxs, dys): |
|||
rx, ry = x + dx, y + dy |
|||
x, y = rule(x, dx), rule(y, dy) |
|||
rxs.append(rx) |
|||
rys.append(ry) |
|||
return rxs, rys |
|||
def mean(xs): return sum(xs) / len(xs) |
|||
def stddev(xs): |
|||
m = mean(xs) |
|||
return math.sqrt(sum((x-m)**2 for x in xs) / len(xs)) |
|||
def experiment(label, rule): |
|||
rxs, rys = funnel(dxs, dys, rule) |
|||
print label |
|||
print 'Mean x, y : %.4f, %.4f' % (mean(rxs), mean(rys)) |
|||
print 'Std dev x, y : %.4f, %.4f' % (stddev(rxs), stddev(rys)) |
|||
print |
|||
experiment('Rule 1:', lambda z, dz: 0) |
|||
experiment('Rule 2:', lambda z, dz: -dz) |
|||
experiment('Rule 3:', lambda z, dz: -(z+dz)) |
|||
experiment('Rule 4:', lambda z, dz: z+dz)</lang> |
|||
The funnel experiment is performed in one dimension. The other dimension would act similarly. |
The funnel experiment is performed in one dimension. The other dimension would act similarly. |
||
<lang python>from random import gauss |
<lang python>from random import gauss |