Deming's funnel: Difference between revisions
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Std dev x, y : 3.2387, 4.4825 |
Std dev x, y : 3.2387, 4.4825 |
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</pre> |
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=={{header|Vlang}}== |
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{{trans|Go}} |
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<lang vlang>import math |
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type Rule = fn(f64, f64) f64 |
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const ( |
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dxs = [ |
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-0.533, 0.270, 0.859, -0.043, -0.205, -0.127, -0.071, 0.275, |
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1.251, -0.231, -0.401, 0.269, 0.491, 0.951, 1.150, 0.001, |
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-0.382, 0.161, 0.915, 2.080, -2.337, 0.034, -0.126, 0.014, |
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0.709, 0.129, -1.093, -0.483, -1.193, 0.020, -0.051, 0.047, |
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-0.095, 0.695, 0.340, -0.182, 0.287, 0.213, -0.423, -0.021, |
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-0.134, 1.798, 0.021, -1.099, -0.361, 1.636, -1.134, 1.315, |
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0.201, 0.034, 0.097, -0.170, 0.054, -0.553, -0.024, -0.181, |
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-0.700, -0.361, -0.789, 0.279, -0.174, -0.009, -0.323, -0.658, |
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0.348, -0.528, 0.881, 0.021, -0.853, 0.157, 0.648, 1.774, |
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-1.043, 0.051, 0.021, 0.247, -0.310, 0.171, 0.000, 0.106, |
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0.024, -0.386, 0.962, 0.765, -0.125, -0.289, 0.521, 0.017, |
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0.281, -0.749, -0.149, -2.436, -0.909, 0.394, -0.113, -0.598, |
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0.443, -0.521, -0.799, 0.087, |
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] |
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dys = [ |
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0.136, 0.717, 0.459, -0.225, 1.392, 0.385, 0.121, -0.395, |
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0.490, -0.682, -0.065, 0.242, -0.288, 0.658, 0.459, 0.000, |
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0.426, 0.205, -0.765, -2.188, -0.742, -0.010, 0.089, 0.208, |
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0.585, 0.633, -0.444, -0.351, -1.087, 0.199, 0.701, 0.096, |
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-0.025, -0.868, 1.051, 0.157, 0.216, 0.162, 0.249, -0.007, |
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0.009, 0.508, -0.790, 0.723, 0.881, -0.508, 0.393, -0.226, |
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0.710, 0.038, -0.217, 0.831, 0.480, 0.407, 0.447, -0.295, |
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1.126, 0.380, 0.549, -0.445, -0.046, 0.428, -0.074, 0.217, |
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-0.822, 0.491, 1.347, -0.141, 1.230, -0.044, 0.079, 0.219, |
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0.698, 0.275, 0.056, 0.031, 0.421, 0.064, 0.721, 0.104, |
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-0.729, 0.650, -1.103, 0.154, -1.720, 0.051, -0.385, 0.477, |
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1.537, -0.901, 0.939, -0.411, 0.341, -0.411, 0.106, 0.224, |
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-0.947, -1.424, -0.542, -1.032, |
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] |
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) |
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fn funnel(fa []f64, r Rule) []f64 { |
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mut x := 0.0 |
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mut result := []f64{len: fa.len} |
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for i, f in fa { |
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result[i] = x + f |
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x = r(x, f) |
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} |
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return result |
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} |
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fn mean(fa []f64) f64 { |
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mut sum := 0.0 |
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for f in fa { |
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sum += f |
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} |
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return sum / f64(fa.len) |
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} |
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fn std_dev(fa []f64) f64 { |
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m := mean(fa) |
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mut sum := 0.0 |
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for f in fa { |
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sum += (f - m) * (f - m) |
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} |
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return math.sqrt(sum / f64(fa.len)) |
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} |
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fn experiment(label string, r Rule) { |
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rxs := funnel(dxs, r) |
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rys := funnel(dys, r) |
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println("$label : x y") |
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println("Mean : ${mean(rxs):7.4f}, ${mean(rys):7.4f}") |
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println("Std Dev : ${std_dev(rxs):7.4f}, ${std_dev(rys):7.4f}") |
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println('') |
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} |
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fn main() { |
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experiment("Rule 1", fn(_ f64, _ f64) f64 { |
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return 0.0 |
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}) |
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experiment("Rule 2", fn(_ f64, dz f64) f64 { |
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return -dz |
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}) |
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experiment("Rule 3", fn(z f64, dz f64) f64 { |
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return -(z + dz) |
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}) |
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experiment("Rule 4", fn(z f64, dz f64) f64 { |
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return z + dz |
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}) |
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}</lang> |
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{{out}} |
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<pre> |
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Rule 1 : x y |
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Mean : 0.0004, 0.0702 |
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Std Dev : 0.7153, 0.6462 |
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Rule 2 : x y |
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Mean : 0.0009, -0.0103 |
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Std Dev : 1.0371, 0.8999 |
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Rule 3 : x y |
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Mean : 0.0439, -0.0063 |
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Std Dev : 7.9871, 4.7784 |
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Rule 4 : x y |
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Mean : 3.1341, 5.4210 |
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Std Dev : 1.5874, 3.9304 |
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</pre> |
</pre> |
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