fengshui
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.fermi.go.swp
Normal file
BIN
.fermi.go.swp
Normal file
Binary file not shown.
185
fermi.go
185
fermi.go
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@ -5,6 +5,7 @@ import (
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"errors"
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"fmt"
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"git.nunosempere.com/NunoSempere/fermi/sample"
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"git.nunosempere.com/NunoSempere/fermi/pretty"
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"math"
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"os"
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"sort"
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@ -39,33 +40,6 @@ type FilledSamples struct {
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xs []float64
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}
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/* Constants */
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const GENERAL_ERR_MSG = " Operation | Variable assignment | Special\n" +
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" Operation: operator operand\n" +
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" operator: (empty) | * | / | + | -\n" +
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" operand: scalar | lognormal | beta | variable\n" +
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" lognormal: low high\n" +
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" beta: beta alpha beta\n" +
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" Variable assignment: =: variable_name\n" +
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" Clear stack: . | c | clear\n" +
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" Variable assignment and clear stack: =. variable_name\n" +
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" Other special operations: help | debug | exit\n" +
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" Examples: \n" +
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" + 2\n" +
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" / 2.5\n" +
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" * 1 10 (interpreted as lognormal)\n" +
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" + 1 10\n" +
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" * beta 1 10\n" +
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" 1 10 (multiplication taken as default operation)\n" +
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" =: x\n" +
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" .\n" +
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" 1 100\n" +
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" + x\n" +
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" exit\n"
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const NORMAL90CONFIDENCE = 1.6448536269514727
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const INIT_DIST Scalar = Scalar(1)
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const N_SAMPLES = 100_000
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/* Dist interface functions */
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// https://go.dev/tour/methods/9
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func (p Scalar) Samples() []float64 {
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@ -93,8 +67,71 @@ func (fs FilledSamples) Samples() []float64 {
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return fs.xs
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}
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// Parse line into Distribution
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/* Constants */
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const GENERAL_ERR_MSG = " Operation | Variable assignment | Special\n" +
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" Operation: operator operand\n" +
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" operator: (empty) | * | / | + | -\n" +
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" operand: scalar | lognormal | beta | variable\n" +
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" lognormal: low high\n" +
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" beta: beta alpha beta\n" +
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" Variable assignment: =: variable_name\n" +
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" Clear stack: . | c | clear\n" +
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" Variable assignment and clear stack: =. variable_name\n" +
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" Other special operations: help | debug | exit\n" +
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" Examples: \n" +
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" + 2\n" +
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" / 2.5\n" +
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" * 1 10 (interpreted as lognormal)\n" +
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" + 1 10\n" +
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" * beta 1 10\n" +
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" 1 10 (multiplication taken as default operation)\n" +
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" =: x\n" +
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" .\n" +
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" 1 100\n" +
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" + x\n" +
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" exit\n"
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const NORMAL90CONFIDENCE = 1.6448536269514727
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const INIT_DIST Scalar = Scalar(1)
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const N_SAMPLES = 100_000
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/* Pretty print for distributions */
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// Needs types
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func prettyPrintDist(dist Dist) {
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switch v := dist.(type) {
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case Lognormal:
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fmt.Printf("=> ")
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pretty.PrettyPrint2Floats(v.low, v.high)
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case FilledSamples:
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tmp_xs := make([]float64, N_SAMPLES)
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copy(tmp_xs, v.xs)
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sort.Slice(tmp_xs, func(i, j int) bool {
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return tmp_xs[i] < tmp_xs[j]
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})
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low_int := N_SAMPLES / 20
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low := tmp_xs[low_int]
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high_int := N_SAMPLES * 19 / 20
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high := tmp_xs[high_int]
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fmt.Printf("=> ")
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pretty.PrettyPrintFloat(low)
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fmt.Printf(" ")
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pretty.PrettyPrintFloat(high)
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fmt.Printf(" (")
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pretty.PrettyPrintInt(N_SAMPLES)
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fmt.Printf(" samples)\n")
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case Beta:
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fmt.Printf("=> beta ")
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pretty.PrettyPrint2Floats(v.a, v.b)
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case Scalar:
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fmt.Printf("=> scalar ")
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w := float64(v)
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pretty.PrettyPrintFloat(w)
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fmt.Println()
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default:
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fmt.Printf("%v", v)
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}
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}
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// Parse line into Distribution
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func parseLineErr(err_msg string) (string, Dist, error) {
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fmt.Println(GENERAL_ERR_MSG)
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fmt.Println(err_msg)
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@ -253,8 +290,10 @@ func divideDists(old_dist Dist, new_dist Dist) (Dist, error) {
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{
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switch n := new_dist.(type) {
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case Lognormal:
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// to do: check division by zero
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return multiplyLogDists(o, Lognormal{low: 1.0 / n.high, high: 1.0 / n.low}), nil
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case Scalar:
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// to do: check division by zero
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return multiplyLogDists(o, Lognormal{low: 1.0 / float64(n), high: 1.0 / float64(n)}), nil
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default:
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return operateDistsAsSamples(old_dist, new_dist, "/")
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@ -266,6 +305,7 @@ func divideDists(old_dist Dist, new_dist Dist) (Dist, error) {
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case Lognormal:
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return multiplyLogDists(Lognormal{low: float64(o), high: float64(o)}, Lognormal{low: 1.0 / n.high, high: 1.0 / n.low}), nil
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case Scalar:
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// to do: check division by zero
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return Scalar(float64(o) / float64(n)), nil
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default:
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return operateDistsAsSamples(old_dist, new_dist, "/")
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@ -276,92 +316,9 @@ func divideDists(old_dist Dist, new_dist Dist) (Dist, error) {
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}
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}
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/* Pretty print distributions
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*/
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func prettyPrintInt(n int) {
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switch {
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case math.Abs(float64(n)) >= 1_000_000_000_000:
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fmt.Printf("%dT", n/1_000_000_000_000)
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case math.Abs(float64(n)) >= 1_000_000_000:
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fmt.Printf("%dB", n/1_000_000_000)
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case math.Abs(float64(n)) >= 1_000_000:
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fmt.Printf("%dM", n/1_000_000)
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case math.Abs(float64(n)) >= 1_000:
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fmt.Printf("%dK", n/1_000)
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default:
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fmt.Printf("%df", n)
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}
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}
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func prettyPrintFloat(f float64) {
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switch {
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case math.Abs(f) >= 1_000_000_000_000:
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fmt.Printf("%.1fT", f/1_000_000_000_000)
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case math.Abs(f) >= 1_000_000_000:
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fmt.Printf("%.1fB", f/1_000_000_000)
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case math.Abs(f) >= 1_000_000:
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fmt.Printf("%.1fM", f/1_000_000)
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case math.Abs(f) >= 1_000:
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fmt.Printf("%.1fK", f/1_000)
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case math.Abs(f) <= 0.0001:
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fmt.Printf("%.5f", f)
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case math.Abs(f) <= 0.001:
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fmt.Printf("%.4f", f)
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case math.Abs(f) <= 0.01:
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fmt.Printf("%.3f", f)
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case math.Abs(f) <= 0.1:
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fmt.Printf("%.2f", f)
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default:
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fmt.Printf("%.1f", f)
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}
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}
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func prettyPrint2Floats(low float64, high float64) {
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prettyPrintFloat(low)
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fmt.Printf(" ")
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prettyPrintFloat(high)
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fmt.Printf("\n")
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}
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func prettyPrintDist(dist Dist) {
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switch v := dist.(type) {
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case Lognormal:
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fmt.Printf("=> ")
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prettyPrint2Floats(v.low, v.high)
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case FilledSamples:
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tmp_xs := make([]float64, N_SAMPLES)
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copy(tmp_xs, v.xs)
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sort.Slice(tmp_xs, func(i, j int) bool {
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return tmp_xs[i] < tmp_xs[j]
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})
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low_int := N_SAMPLES / 20
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low := tmp_xs[low_int]
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high_int := N_SAMPLES * 19 / 20
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high := tmp_xs[high_int]
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fmt.Printf("=> ")
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prettyPrintFloat(low)
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fmt.Printf(" ")
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prettyPrintFloat(high)
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fmt.Printf(" (")
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prettyPrintInt(N_SAMPLES)
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fmt.Printf(" samples)\n")
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case Beta:
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fmt.Printf("=> beta ")
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prettyPrint2Floats(v.a, v.b)
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case Scalar:
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fmt.Printf("=> scalar ")
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w := float64(v)
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prettyPrintFloat(w)
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fmt.Println()
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default:
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fmt.Printf("%v", v)
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}
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}
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/* Combine old dist and new line */
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// We want this as a function to be able to have parenthesis/recusion, possibly functions
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func combineStackAndDist(stack Stack, new_dist Dist, op string) Stack {
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func operateStackWithDist(stack Stack, new_dist Dist, op string) Stack {
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var combined_dist Dist
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var err error
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@ -403,7 +360,7 @@ func runRepl(stack Stack, reader *bufio.Reader) Stack {
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/* Parenthesis */
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case len(words) == 2 && (words[0] == "*" || words[0] == "+" || words[0] == "-" || words[0] == "/") && words[1] == "(":
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new_stack := runRepl(Stack{old_dist: INIT_DIST, vars: stack.vars}, reader)
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stack = combineStackAndDist(stack, new_stack.old_dist, words[0])
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stack = operateStackWithDist(stack, new_stack.old_dist, words[0])
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prettyPrintDist(stack.old_dist)
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case len(words) == 1 && words[0] == ")":
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return stack
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@ -439,7 +396,7 @@ func runRepl(stack Stack, reader *bufio.Reader) Stack {
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if err != nil {
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continue replForLoop
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}
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stack = combineStackAndDist(stack, new_dist, op)
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stack = operateStackWithDist(stack, new_dist, op)
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prettyPrintDist(stack.old_dist)
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}
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}
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52
pretty/pretty.go
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52
pretty/pretty.go
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@ -0,0 +1,52 @@
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package pretty
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import (
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"fmt"
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"math"
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)
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func PrettyPrintInt(n int) {
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switch {
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case math.Abs(float64(n)) >= 1_000_000_000_000:
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fmt.Printf("%dT", n/1_000_000_000_000)
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case math.Abs(float64(n)) >= 1_000_000_000:
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fmt.Printf("%dB", n/1_000_000_000)
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case math.Abs(float64(n)) >= 1_000_000:
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fmt.Printf("%dM", n/1_000_000)
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case math.Abs(float64(n)) >= 1_000:
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fmt.Printf("%dK", n/1_000)
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default:
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fmt.Printf("%df", n)
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}
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}
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func PrettyPrintFloat(f float64) {
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switch {
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case math.Abs(f) >= 1_000_000_000_000:
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fmt.Printf("%.1fT", f/1_000_000_000_000)
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case math.Abs(f) >= 1_000_000_000:
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fmt.Printf("%.1fB", f/1_000_000_000)
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case math.Abs(f) >= 1_000_000:
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fmt.Printf("%.1fM", f/1_000_000)
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case math.Abs(f) >= 1_000:
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fmt.Printf("%.1fK", f/1_000)
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case math.Abs(f) <= 0.0001:
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fmt.Printf("%.5f", f)
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case math.Abs(f) <= 0.001:
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fmt.Printf("%.4f", f)
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case math.Abs(f) <= 0.01:
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fmt.Printf("%.3f", f)
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case math.Abs(f) <= 0.1:
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fmt.Printf("%.2f", f)
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default:
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fmt.Printf("%.1f", f)
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}
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}
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func PrettyPrint2Floats(low float64, high float64) {
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PrettyPrintFloat(low)
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fmt.Printf(" ")
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PrettyPrintFloat(high)
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fmt.Printf("\n")
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}
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