f2 to f, f to f0

f.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
 	"math"
 	"os"
@@ -10,37 +11,110 @@ import (
 )
 
 const NORMAL90CONFIDENCE = 1.6448536269514727
+const general_err_msg = "Valid inputs: 2 || * 2 || / 2 || 2 20 || * 2 20 || / 2 20 || clean || =: var || op var || clean || help || debug || exit"
 
-func boundsToLogParams(low float64, high float64) (float64, float64) {
+// Actually, I should look up how do do a) enums in go, b) union types
-	loglow := math.Log(low)
+type Lognormal struct {
-	loghigh := math.Log(high)
+	low  float64
-	logmean := (loghigh + loglow) / 2.0
+	high float64
-	logstd := (loghigh - loglow) / (2.0 * NORMAL90CONFIDENCE)
+}
-	return logmean, logstd
+
+type Dist struct {
+	Type      string
+	Lognormal Lognormal
+	Samples   []float64
+}
+
+// Parse line into Distribution
+func parseLineErr(err_msg string) (string, Dist, error) {
+	fmt.Println(general_err_msg)
+	fmt.Println(err_msg)
+	return "", Dist{}, errors.New(err_msg)
+}
+func parseLine(line string, vars map[string]Dist) (string, Dist, error) {
+
+	words := strings.Split(strings.TrimSpace(line), " ")
+	op := ""
+	var dist Dist
+
+	switch words[0] {
+	case "*":
+		op = "*"
+		words = words[1:]
+	case "/":
+		op = "/"
+		words = words[1:]
+	case "+":
+		return parseLineErr("+ operation not implemented yet")
+	case "-":
+		return parseLineErr("- operation not implemented yet")
+	default:
+		op = "*" // later, change the below to
+	}
+
+	switch len(words) {
+	case 0:
+		return parseLineErr("Operator must have operand; can't operate on nothing")
+	case 1:
+		var_word, var_word_exists := vars[words[0]]
+		single_float, err1 := strconv.ParseFloat(words[0], 64)
+		switch {
+		case var_word_exists:
+			dist = var_word
+		case err1 == nil:
+			dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: single_float, high: single_float}, Samples: nil}
+		case err1 != nil && !var_word_exists:
+			return parseLineErr("Trying to operate on a scalar, but scalar is neither a float nor an assigned variable")
+		}
+	case 2:
+		new_low, err1 := strconv.ParseFloat(words[0], 64)
+		new_high, err2 := strconv.ParseFloat(words[1], 64)
+		if err1 != nil || err2 != nil {
+			return parseLineErr("Trying to operate by a distribution, but distribution is not specified as two floats")
+		}
+		dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: new_low, high: new_high}, Samples: nil}
+	default:
+		return parseLineErr("Other input methods not implemented yet")
+	}
+	return op, dist, nil
 
 }
 
-func multiplyLognormals(logmean1 float64, logstd1 float64, logmean2 float64, logstd2 float64) (float64, float64) {
+// Join distributions
-	return logmean1 + logmean2, math.Sqrt(logstd1*logstd1 + logstd2*logstd2)
+// Multiply lognormals
+
+func multiplyLogDists(l1 Lognormal, l2 Lognormal) Lognormal {
+	logmean1 := (math.Log(l1.high) + math.Log(l1.low)) / 2.0
+	logstd1 := (math.Log(l1.high) - math.Log(l1.low)) / (2.0 * NORMAL90CONFIDENCE)
+
+	logmean2 := (math.Log(l2.high) + math.Log(l2.low)) / 2.0
+	logstd2 := (math.Log(l2.high) - math.Log(l2.low)) / (2.0 * NORMAL90CONFIDENCE)
+
+	logmean_product := logmean1 + logmean2
+	logstd_product := math.Sqrt(logstd1*logstd1 + logstd2*logstd2)
+
+	h := logstd_product * NORMAL90CONFIDENCE
+	loglow := logmean_product - h
+	loghigh := logmean_product + h
+	return Lognormal{low: math.Exp(loglow), high: math.Exp(loghigh)}
+
 }
 
-func logParamsToBounds(logmean float64, logstd float64) (float64, float64) {
+func joinDists(old_dist Dist, new_dist Dist, op string) (Dist, error) {
-	h := logstd * NORMAL90CONFIDENCE
+	switch {
-	loglow := logmean - h
+	case old_dist.Type == "Lognormal" && new_dist.Type == "Lognormal" && op == "*":
-	loghigh := logmean + h
+		return Dist{Type: "Lognormal", Lognormal: multiplyLogDists(old_dist.Lognormal, new_dist.Lognormal), Samples: nil}, nil
-	return math.Exp(loglow), math.Exp(loghigh)
+	case old_dist.Type == "Lognormal" && new_dist.Type == "Lognormal" && op == "/":
+		tmp_dist := Lognormal{low: 1.0 / new_dist.Lognormal.high, high: 1.0 / new_dist.Lognormal.low}
+		return Dist{Type: "Lognormal", Lognormal: multiplyLogDists(old_dist.Lognormal, tmp_dist), Samples: nil}, nil
+	default:
+		fmt.Printf("For now, can't do anything besides multiplying lognormals\n")
+	}
+	return old_dist, errors.New("Can't combine distributions in this way")
 }
 
-func combineBounds(old_low, old_high, new_low, new_high float64) (float64, float64) {
+/* Pretty print distributions */
-	logmean_old, logstd_old := boundsToLogParams(old_low, old_high)
+func prettyPrintLognormal(low float64, high float64) {
-	logmean_new, logstd_new := boundsToLogParams(new_low, new_high)
-
-	logmean_product, logstd_product := multiplyLognormals(logmean_old, logstd_old, logmean_new, logstd_new)
-
-	return logParamsToBounds(logmean_product, logstd_product)
-}
-
-func prettyPrintDist(low float64, high float64) {
 	// fmt.Printf("=> %.1f %.1f\n", low, high)
 	fmt.Printf("=> ")
 	switch {
@@ -76,155 +150,76 @@ func prettyPrintDist(low float64, high float64) {
 	// fmt.Printf("=> %.1f %.1f\n", low, high)
 }
 
+func prettyPrintDist(dist Dist) {
+	if dist.Type == "Lognormal" {
+		prettyPrintLognormal(dist.Lognormal.low, dist.Lognormal.high)
+	} else {
+		fmt.Printf("%v", dist)
+	}
+}
+
+/* Main event loop */
 func main() {
 	reader := bufio.NewReader(os.Stdin)
-
+	init_dist := Dist{Type: "Lognormal", Lognormal: Lognormal{low: 1, high: 1}, Samples: nil} // Could also just be a scalar
-	var old_low, old_high float64
+	old_dist := init_dist
-	var input string
+	vars := make(map[string]Dist)
-	var err1, err2 error
+	// Could eventually be a more complex struct with:
-
+	// { Dist, VariableMaps, ConfigParams } or smth
-InitialForLoop:
-	for {
-		input, _ = reader.ReadString('\n')
-		input = strings.TrimSpace(input)
-		words := strings.Split(input, " ")
-
-		switch len(words) {
-		case 1:
-			single_float, err1 := strconv.ParseFloat(words[0], 64)
-			if err1 != nil {
-				fmt.Println("Trying to initialize with a scalar, but scalar is not a float")
-				continue InitialForLoop
-			}
-			old_low = single_float
-			old_high = single_float
-		case 2:
-			old_low, err1 = strconv.ParseFloat(words[0], 64)
-			old_high, err2 = strconv.ParseFloat(words[1], 64)
-			if err1 != nil || err2 != nil {
-				fmt.Println("Trying to initialize with a distribution, but distribution is not specified as two floats")
-				continue InitialForLoop
-			}
-		default:
-			fmt.Println("Please enter two floats separated by a space, like: 1 10")
-			continue InitialForLoop
-		}
-		if err1 != nil || err2 != nil {
-			fmt.Println("Please enter two floats separated by a space, like: 1 10")
-			continue
-		}
-		break
-	}
-	prettyPrintDist(old_low, old_high)
-
-	error_msg_cont := "Valid inputs: 2 || * 2 || / 2 || 2 20 || * 2 20 || / 2 20 || i || e"
 EventForLoop:
 	for {
-		input, _ = reader.ReadString('\n')
+		input, _ := reader.ReadString('\n')
 		if strings.TrimSpace(input) == "" {
 			continue EventForLoop
 		}
-		words := strings.Split(strings.TrimSpace(input), " ")
 
-		var new_low, new_high float64
+		{
-
+			words := strings.Split(strings.TrimSpace(input), " ")
-		switch words[0] {
+			switch {
-		case "*":
+			case words[0] == "exit" || words[0] == "e":
-			switch len(words) {
+				break EventForLoop
-			case 1:
+			case words[0] == "help" || words[0] == "h":
-				fmt.Println("Can't multiply by nothing")
+				fmt.Println(general_err_msg)
-				fmt.Println(error_msg_cont)
 				continue EventForLoop
-			case 2:
+			case words[0] == "debug" || words[0] == "d":
-				single_float, err1 := strconv.ParseFloat(words[1], 64)
+				fmt.Printf("Old dist: %v\n", old_dist)
-				if err1 != nil {
+				fmt.Printf("Vars: %v\n", vars)
-					fmt.Println("Trying to multiply by a scalar, but scalar is not a float")
-					fmt.Println(error_msg_cont)
-					continue EventForLoop
-				}
-				new_low = single_float
-				new_high = single_float
-			case 3:
-				new_low, err1 = strconv.ParseFloat(words[1], 64)
-				new_high, err2 = strconv.ParseFloat(words[2], 64)
-				if err1 != nil || err2 != nil {
-					fmt.Println(error_msg_cont)
-					fmt.Println("Trying to multiply by a distribution, but distribution is not specified as two floats")
-					continue EventForLoop
-				}
-			default:
-				fmt.Println("Trying to multiply by something, but this something is neither a scalar nor a distribution")
-				fmt.Println(error_msg_cont)
 				continue EventForLoop
-			}
+			case words[0] == "=:" && len(words) == 2:
-		case "/":
+				vars[words[1]] = old_dist
-			switch len(words) {
+				fmt.Printf("%s ", words[1])
-			case 1:
+				prettyPrintDist(old_dist)
-				fmt.Println("Can't divide by nothing")
-				fmt.Println(error_msg_cont)
 				continue EventForLoop
-			case 2:
+			case words[0] == "." || words[0] == "clean" || words[0] == "c":
-				single_float, err1 := strconv.ParseFloat(words[1], 64)
+				old_dist = init_dist
-				if err1 != nil {
+				fmt.Println()
-					fmt.Println("Trying to divide by a scalar, but scalar is not a float")
-					fmt.Println(error_msg_cont)
-					continue EventForLoop
-				}
-				new_low = 1.0 / single_float
-				new_high = 1.0 / single_float
-			case 3:
-				new_low, err1 = strconv.ParseFloat(words[1], 64)
-				new_high, err2 = strconv.ParseFloat(words[2], 64)
-				if err1 != nil || err2 != nil {
-					fmt.Println("Trying to divide by a distribution, but distribution is not specified as two floats")
-					fmt.Println(error_msg_cont)
-					continue EventForLoop
-				}
-				tmp := new_low
-				new_low = 1.0 / new_high
-				new_high = 1.0 / tmp
-			default:
-				fmt.Println("Trying to divide by something, but this something is neither a scalar nor a distribution")
-			}
-		default:
-			switch len(words) {
-			case 0:
 				continue EventForLoop
-			case 1:
+			case words[0] == "=." && len(words) == 2:
-				switch words[0] {
+				vars[words[1]] = old_dist
-				case "i":
+				fmt.Printf("%s ", words[1])
-					fmt.Printf("=> %.1f %.1f\n", old_low, old_high)
+				prettyPrintDist(old_dist)
-					logmean_old, logstd_old := boundsToLogParams(old_low, old_high)
+				old_dist = init_dist
-					fmt.Printf("=> Lognormal, with logmean: %.1f, logstd: %.1f\n", logmean_old, logstd_old)
+				fmt.Println()
-					continue EventForLoop
-				case "e":
-					break EventForLoop
-				default:
-					single_float, err1 := strconv.ParseFloat(words[0], 64)
-					if err1 != nil {
-						fmt.Println("Unrecognized command")
-						fmt.Println(error_msg_cont)
-						continue EventForLoop
-					}
-					new_low = single_float
-					new_high = single_float
-				}
-			case 2:
-				new_low, err1 = strconv.ParseFloat(words[0], 64)
-				new_high, err2 = strconv.ParseFloat(words[1], 64)
-				if err1 != nil || err2 != nil {
-					fmt.Println("Trying to multiply by a distribution, but distribution is not specified as two floats")
-					fmt.Println(error_msg_cont)
-					continue EventForLoop
-				}
-			default:
-				fmt.Println("No operation takes more than 3 words")
-				fmt.Println(error_msg_cont)
 				continue EventForLoop
+				// Other possible cases:
+				// Save to file
+				// Sample n samples
+				// Save stack to a variable?
+				// clean stack
+				// Define a function? No, too much of a nerdsnipea
 			}
 		}
 
-		old_low, old_high = combineBounds(old_low, old_high, new_low, new_high)
+		op, new_dist, err := parseLine(input, vars)
-		prettyPrintDist(old_low, old_high)
+		if err != nil {
+			continue EventForLoop
+		}
+
+		joint_dist, err := joinDists(old_dist, new_dist, op)
+		if err != nil {
+			continue EventForLoop
+		}
+		old_dist = joint_dist
+		prettyPrintDist(old_dist)
 	}
 }

f0.go

@@ -0,0 +1,230 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"math"
+	"os"
+	"strconv"
+	"strings"
+)
+
+const NORMAL90CONFIDENCE = 1.6448536269514727
+
+func boundsToLogParams(low float64, high float64) (float64, float64) {
+	loglow := math.Log(low)
+	loghigh := math.Log(high)
+	logmean := (loghigh + loglow) / 2.0
+	logstd := (loghigh - loglow) / (2.0 * NORMAL90CONFIDENCE)
+	return logmean, logstd
+
+}
+
+func multiplyLognormals(logmean1 float64, logstd1 float64, logmean2 float64, logstd2 float64) (float64, float64) {
+	return logmean1 + logmean2, math.Sqrt(logstd1*logstd1 + logstd2*logstd2)
+}
+
+func logParamsToBounds(logmean float64, logstd float64) (float64, float64) {
+	h := logstd * NORMAL90CONFIDENCE
+	loglow := logmean - h
+	loghigh := logmean + h
+	return math.Exp(loglow), math.Exp(loghigh)
+}
+
+func combineBounds(old_low, old_high, new_low, new_high float64) (float64, float64) {
+	logmean_old, logstd_old := boundsToLogParams(old_low, old_high)
+	logmean_new, logstd_new := boundsToLogParams(new_low, new_high)
+
+	logmean_product, logstd_product := multiplyLognormals(logmean_old, logstd_old, logmean_new, logstd_new)
+
+	return logParamsToBounds(logmean_product, logstd_product)
+}
+
+func prettyPrintDist(low float64, high float64) {
+	// fmt.Printf("=> %.1f %.1f\n", low, high)
+	fmt.Printf("=> ")
+	switch {
+	case math.Abs(low) >= 1_000_000_000_000:
+		fmt.Printf("%.1fT", low/1_000_000_000_000)
+	case math.Abs(low) >= 1_000_000_000:
+		fmt.Printf("%.1fB", low/1_000_000_000)
+	case math.Abs(low) >= 1_000_000:
+		fmt.Printf("%.1fM", low/1_000_000)
+	case math.Abs(low) >= 1_000:
+		fmt.Printf("%.1fK", low/1_000)
+	case math.Abs(low) >= 1_000:
+		fmt.Printf("%.1fK", low/1_000)
+	default:
+		fmt.Printf("%.1f", low)
+	}
+	fmt.Printf(" ")
+	switch {
+	case math.Abs(high) >= 1_000_000_000_000:
+		fmt.Printf("%.1fT", high/1_000_000_000_000)
+	case math.Abs(high) >= 1_000_000_000:
+		fmt.Printf("%.1fB", high/1_000_000_000)
+	case math.Abs(high) >= 1_000_000:
+		fmt.Printf("%.1fM", high/1_000_000)
+	case math.Abs(high) >= 1_000:
+		fmt.Printf("%.1fK", high/1_000)
+	case math.Abs(high) >= 1_000:
+		fmt.Printf("%.1fK", high/1_000)
+	default:
+		fmt.Printf("%.1f", high)
+	}
+	fmt.Printf("\n")
+	// fmt.Printf("=> %.1f %.1f\n", low, high)
+}
+
+func main() {
+	reader := bufio.NewReader(os.Stdin)
+
+	var old_low, old_high float64
+	var input string
+	var err1, err2 error
+
+InitialForLoop:
+	for {
+		input, _ = reader.ReadString('\n')
+		input = strings.TrimSpace(input)
+		words := strings.Split(input, " ")
+
+		switch len(words) {
+		case 1:
+			single_float, err1 := strconv.ParseFloat(words[0], 64)
+			if err1 != nil {
+				fmt.Println("Trying to initialize with a scalar, but scalar is not a float")
+				continue InitialForLoop
+			}
+			old_low = single_float
+			old_high = single_float
+		case 2:
+			old_low, err1 = strconv.ParseFloat(words[0], 64)
+			old_high, err2 = strconv.ParseFloat(words[1], 64)
+			if err1 != nil || err2 != nil {
+				fmt.Println("Trying to initialize with a distribution, but distribution is not specified as two floats")
+				continue InitialForLoop
+			}
+		default:
+			fmt.Println("Please enter two floats separated by a space, like: 1 10")
+			continue InitialForLoop
+		}
+		if err1 != nil || err2 != nil {
+			fmt.Println("Please enter two floats separated by a space, like: 1 10")
+			continue
+		}
+		break
+	}
+	prettyPrintDist(old_low, old_high)
+
+	error_msg_cont := "Valid inputs: 2 || * 2 || / 2 || 2 20 || * 2 20 || / 2 20 || i || e"
+EventForLoop:
+	for {
+		input, _ = reader.ReadString('\n')
+		if strings.TrimSpace(input) == "" {
+			continue EventForLoop
+		}
+		words := strings.Split(strings.TrimSpace(input), " ")
+
+		var new_low, new_high float64
+
+		switch words[0] {
+		case "*":
+			switch len(words) {
+			case 1:
+				fmt.Println("Can't multiply by nothing")
+				fmt.Println(error_msg_cont)
+				continue EventForLoop
+			case 2:
+				single_float, err1 := strconv.ParseFloat(words[1], 64)
+				if err1 != nil {
+					fmt.Println("Trying to multiply by a scalar, but scalar is not a float")
+					fmt.Println(error_msg_cont)
+					continue EventForLoop
+				}
+				new_low = single_float
+				new_high = single_float
+			case 3:
+				new_low, err1 = strconv.ParseFloat(words[1], 64)
+				new_high, err2 = strconv.ParseFloat(words[2], 64)
+				if err1 != nil || err2 != nil {
+					fmt.Println(error_msg_cont)
+					fmt.Println("Trying to multiply by a distribution, but distribution is not specified as two floats")
+					continue EventForLoop
+				}
+			default:
+				fmt.Println("Trying to multiply by something, but this something is neither a scalar nor a distribution")
+				fmt.Println(error_msg_cont)
+				continue EventForLoop
+			}
+		case "/":
+			switch len(words) {
+			case 1:
+				fmt.Println("Can't divide by nothing")
+				fmt.Println(error_msg_cont)
+				continue EventForLoop
+			case 2:
+				single_float, err1 := strconv.ParseFloat(words[1], 64)
+				if err1 != nil {
+					fmt.Println("Trying to divide by a scalar, but scalar is not a float")
+					fmt.Println(error_msg_cont)
+					continue EventForLoop
+				}
+				new_low = 1.0 / single_float
+				new_high = 1.0 / single_float
+			case 3:
+				new_low, err1 = strconv.ParseFloat(words[1], 64)
+				new_high, err2 = strconv.ParseFloat(words[2], 64)
+				if err1 != nil || err2 != nil {
+					fmt.Println("Trying to divide by a distribution, but distribution is not specified as two floats")
+					fmt.Println(error_msg_cont)
+					continue EventForLoop
+				}
+				tmp := new_low
+				new_low = 1.0 / new_high
+				new_high = 1.0 / tmp
+			default:
+				fmt.Println("Trying to divide by something, but this something is neither a scalar nor a distribution")
+			}
+		default:
+			switch len(words) {
+			case 0:
+				continue EventForLoop
+			case 1:
+				switch words[0] {
+				case "i":
+					fmt.Printf("=> %.1f %.1f\n", old_low, old_high)
+					logmean_old, logstd_old := boundsToLogParams(old_low, old_high)
+					fmt.Printf("=> Lognormal, with logmean: %.1f, logstd: %.1f\n", logmean_old, logstd_old)
+					continue EventForLoop
+				case "e":
+					break EventForLoop
+				default:
+					single_float, err1 := strconv.ParseFloat(words[0], 64)
+					if err1 != nil {
+						fmt.Println("Unrecognized command")
+						fmt.Println(error_msg_cont)
+						continue EventForLoop
+					}
+					new_low = single_float
+					new_high = single_float
+				}
+			case 2:
+				new_low, err1 = strconv.ParseFloat(words[0], 64)
+				new_high, err2 = strconv.ParseFloat(words[1], 64)
+				if err1 != nil || err2 != nil {
+					fmt.Println("Trying to multiply by a distribution, but distribution is not specified as two floats")
+					fmt.Println(error_msg_cont)
+					continue EventForLoop
+				}
+			default:
+				fmt.Println("No operation takes more than 3 words")
+				fmt.Println(error_msg_cont)
+				continue EventForLoop
+			}
+		}
+
+		old_low, old_high = combineBounds(old_low, old_high, new_low, new_high)
+		prettyPrintDist(old_low, old_high)
+	}
+}

f2.go

@@ -1,225 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"errors"
-	"fmt"
-	"math"
-	"os"
-	"strconv"
-	"strings"
-)
-
-const NORMAL90CONFIDENCE = 1.6448536269514727
-const general_err_msg = "Valid inputs: 2 || * 2 || / 2 || 2 20 || * 2 20 || / 2 20 || clean || =: var || op var || clean || help || debug || exit"
-
-// Actually, I should look up how do do a) enums in go, b) union types
-type Lognormal struct {
-	low  float64
-	high float64
-}
-
-type Dist struct {
-	Type      string
-	Lognormal Lognormal
-	Samples   []float64
-}
-
-// Parse line into Distribution
-func parseLineErr(err_msg string) (string, Dist, error) {
-	fmt.Println(general_err_msg)
-	fmt.Println(err_msg)
-	return "", Dist{}, errors.New(err_msg)
-}
-func parseLine(line string, vars map[string]Dist) (string, Dist, error) {
-
-	words := strings.Split(strings.TrimSpace(line), " ")
-	op := ""
-	var dist Dist
-
-	switch words[0] {
-	case "*":
-		op = "*"
-		words = words[1:]
-	case "/":
-		op = "/"
-		words = words[1:]
-	case "+":
-		return parseLineErr("+ operation not implemented yet")
-	case "-":
-		return parseLineErr("- operation not implemented yet")
-	default:
-		op = "*" // later, change the below to
-	}
-
-	switch len(words) {
-	case 0:
-		return parseLineErr("Operator must have operand; can't operate on nothing")
-	case 1:
-		var_word, var_word_exists := vars[words[0]]
-		single_float, err1 := strconv.ParseFloat(words[0], 64)
-		switch {
-		case var_word_exists:
-			dist = var_word
-		case err1 == nil:
-			dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: single_float, high: single_float}, Samples: nil}
-		case err1 != nil && !var_word_exists:
-			return parseLineErr("Trying to operate on a scalar, but scalar is neither a float nor an assigned variable")
-		}
-	case 2:
-		new_low, err1 := strconv.ParseFloat(words[0], 64)
-		new_high, err2 := strconv.ParseFloat(words[1], 64)
-		if err1 != nil || err2 != nil {
-			return parseLineErr("Trying to operate by a distribution, but distribution is not specified as two floats")
-		}
-		dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: new_low, high: new_high}, Samples: nil}
-	default:
-		return parseLineErr("Other input methods not implemented yet")
-	}
-	return op, dist, nil
-
-}
-
-// Join distributions
-// Multiply lognormals
-
-func multiplyLogDists(l1 Lognormal, l2 Lognormal) Lognormal {
-	logmean1 := (math.Log(l1.high) + math.Log(l1.low)) / 2.0
-	logstd1 := (math.Log(l1.high) - math.Log(l1.low)) / (2.0 * NORMAL90CONFIDENCE)
-
-	logmean2 := (math.Log(l2.high) + math.Log(l2.low)) / 2.0
-	logstd2 := (math.Log(l2.high) - math.Log(l2.low)) / (2.0 * NORMAL90CONFIDENCE)
-
-	logmean_product := logmean1 + logmean2
-	logstd_product := math.Sqrt(logstd1*logstd1 + logstd2*logstd2)
-
-	h := logstd_product * NORMAL90CONFIDENCE
-	loglow := logmean_product - h
-	loghigh := logmean_product + h
-	return Lognormal{low: math.Exp(loglow), high: math.Exp(loghigh)}
-
-}
-
-func joinDists(old_dist Dist, new_dist Dist, op string) (Dist, error) {
-	switch {
-	case old_dist.Type == "Lognormal" && new_dist.Type == "Lognormal" && op == "*":
-		return Dist{Type: "Lognormal", Lognormal: multiplyLogDists(old_dist.Lognormal, new_dist.Lognormal), Samples: nil}, nil
-	case old_dist.Type == "Lognormal" && new_dist.Type == "Lognormal" && op == "/":
-		tmp_dist := Lognormal{low: 1.0 / new_dist.Lognormal.high, high: 1.0 / new_dist.Lognormal.low}
-		return Dist{Type: "Lognormal", Lognormal: multiplyLogDists(old_dist.Lognormal, tmp_dist), Samples: nil}, nil
-	default:
-		fmt.Printf("For now, can't do anything besides multiplying lognormals\n")
-	}
-	return old_dist, errors.New("Can't combine distributions in this way")
-}
-
-/* Pretty print distributions */
-func prettyPrintLognormal(low float64, high float64) {
-	// fmt.Printf("=> %.1f %.1f\n", low, high)
-	fmt.Printf("=> ")
-	switch {
-	case math.Abs(low) >= 1_000_000_000_000:
-		fmt.Printf("%.1fT", low/1_000_000_000_000)
-	case math.Abs(low) >= 1_000_000_000:
-		fmt.Printf("%.1fB", low/1_000_000_000)
-	case math.Abs(low) >= 1_000_000:
-		fmt.Printf("%.1fM", low/1_000_000)
-	case math.Abs(low) >= 1_000:
-		fmt.Printf("%.1fK", low/1_000)
-	case math.Abs(low) >= 1_000:
-		fmt.Printf("%.1fK", low/1_000)
-	default:
-		fmt.Printf("%.1f", low)
-	}
-	fmt.Printf(" ")
-	switch {
-	case math.Abs(high) >= 1_000_000_000_000:
-		fmt.Printf("%.1fT", high/1_000_000_000_000)
-	case math.Abs(high) >= 1_000_000_000:
-		fmt.Printf("%.1fB", high/1_000_000_000)
-	case math.Abs(high) >= 1_000_000:
-		fmt.Printf("%.1fM", high/1_000_000)
-	case math.Abs(high) >= 1_000:
-		fmt.Printf("%.1fK", high/1_000)
-	case math.Abs(high) >= 1_000:
-		fmt.Printf("%.1fK", high/1_000)
-	default:
-		fmt.Printf("%.1f", high)
-	}
-	fmt.Printf("\n")
-	// fmt.Printf("=> %.1f %.1f\n", low, high)
-}
-
-func prettyPrintDist(dist Dist) {
-	if dist.Type == "Lognormal" {
-		prettyPrintLognormal(dist.Lognormal.low, dist.Lognormal.high)
-	} else {
-		fmt.Printf("%v", dist)
-	}
-}
-
-/* Main event loop */
-func main() {
-	reader := bufio.NewReader(os.Stdin)
-	init_dist := Dist{Type: "Lognormal", Lognormal: Lognormal{low: 1, high: 1}, Samples: nil} // Could also just be a scalar
-	old_dist := init_dist
-	vars := make(map[string]Dist)
-	// Could eventually be a more complex struct with:
-	// { Dist, VariableMaps, ConfigParams } or smth
-EventForLoop:
-	for {
-		input, _ := reader.ReadString('\n')
-		if strings.TrimSpace(input) == "" {
-			continue EventForLoop
-		}
-
-		{
-			words := strings.Split(strings.TrimSpace(input), " ")
-			switch {
-			case words[0] == "exit" || words[0] == "e":
-				break EventForLoop
-			case words[0] == "help" || words[0] == "h":
-				fmt.Println(general_err_msg)
-				continue EventForLoop
-			case words[0] == "debug" || words[0] == "d":
-				fmt.Printf("Old dist: %v\n", old_dist)
-				fmt.Printf("Vars: %v\n", vars)
-				continue EventForLoop
-			case words[0] == "=:" && len(words) == 2:
-				vars[words[1]] = old_dist
-				fmt.Printf("%s ", words[1])
-				prettyPrintDist(old_dist)
-				continue EventForLoop
-			case words[0] == "." || words[0] == "clean" || words[0] == "c":
-				old_dist = init_dist
-				fmt.Println()
-				continue EventForLoop
-			case words[0] == "=." && len(words) == 2:
-				vars[words[1]] = old_dist
-				fmt.Printf("%s ", words[1])
-				prettyPrintDist(old_dist)
-				old_dist = init_dist
-				fmt.Println()
-				continue EventForLoop
-				// Other possible cases:
-				// Save to file
-				// Sample n samples
-				// Save stack to a variable?
-				// clean stack
-				// Define a function? No, too much of a nerdsnipea
-			}
-		}
-
-		op, new_dist, err := parseLine(input, vars)
-		if err != nil {
-			continue EventForLoop
-		}
-
-		joint_dist, err := joinDists(old_dist, new_dist, op)
-		if err != nil {
-			continue EventForLoop
-		}
-		old_dist = joint_dist
-		prettyPrintDist(old_dist)
-	}
-}