dot

commit cfc72726f20d4e56d5efd5701ef14dfbf3a2e377
parent a74e2e0cf738f74b095b9696b2d5045958537f10
Author: Josuah Demangeon <josuah.demangeon@gandi.net>
Date:   Thu, 27 Jul 2017 00:24:39 +0200

bin/plot: automatic height

Add a '-h num' argument that sets the height of the plot

Diffstat:
M
bin/plot
 | 
43
++++++++++++++++++++++---------------------

1 file changed, 22 insertions(+), 21 deletions(-)
diff --git a/bin/plot b/bin/plot
@@ -1,13 +1,10 @@
 awk '
 
 BEGIN {
-	stepx = stepy = 1
-
 	for (i = 1; i < ARGC; i++) {
-		if      (ARGV[i] == "-x" && i + 1 < ARGC) stepx = ARGV[++i]
-		else if (ARGV[i] == "-y" && i + 1 < ARGC) stepy = ARGV[++i]
+		if (ARGV[i] == "-h" && i + 1 < ARGC) height = ARGV[++i]
 		else {
-			print "Usage: plot [-x step] [-y step]"
+			print "Usage: plot [-h height]"
 			exit 1
 		}
 	}
@@ -16,28 +13,30 @@ BEGIN {
 }
 
 {
+	stepy = 1
 	maxx = split($0, dots)
-	maxy = max = 0
 
-	# scale the values and find the max
-	for (x = 1; x <= maxx; x++) {
-		if (max  < dots[x]) max  = dots[x]
-		dots[x] = int(dots[x] / stepy)
-		if (maxy < dots[x]) maxy = dots[x]
-	}
+	# find the max and the steps
+	for (x = 1; x <= maxx; x++)
+		if (maxy  < dots[x]) maxy = dots[x]
+	if (height)
+		stepy = maxy / height
+	else
+		height = maxy
 
 	# draw the grid
-	margin = length(max) > 10 ? length(max) : 10
-	for (y = maxy + maxy % 2; y >= 1; y -= 2) {
-		if (y % 4)
-			printf "%" margin "s  |", ""
+	float  = (int(stepy) != stepy)
+	margin = length(maxy) + float * 4 > 10 ? length(maxy) + float * 4 : 10 
+	for (y = height + height % 2; y >= 0; y -= 2) {
+		if (num = !num)
+			printf "%" margin   "s  |", ""
+		else if (float)
+			printf "%" margin ".3f -|", (y + 1) * stepy
 		else
-			printf "%" margin "d -|", (y - 1) * stepy
-
+			printf "%" margin   "d -|", (y + 1) * stepy
 		for (x = 1; x <= maxx; x++)
-			printf "%s", (dots[x] >= y     ? ":" : \
-			              dots[x] >= y - 1 ? "." : " ")
-
+			printf "%s", (dots[x] > (y + 1) * stepy ? ":" : \
+			              dots[x] > (y    ) * stepy ? "." : " ")
 		print ""
 	}
 
@@ -46,5 +45,7 @@ BEGIN {
 	for (x = 1; x <= maxx; x++)
 		printf "-"
 	print "+ " maxx * stepx
+
+	exit
 }
 ' "$@"