Smooth scatter plot with pngcairo

Author: devstopfix

README.md

@@ -55,7 +55,7 @@ Write two datasets to a PNG file:
 
 ```elixir
 {:ok, _cmd} = G.plot([
-  [:set, :term, :png], 
+  [:set, :term, :png],
   [:set, :output, "/tmp/rand.png"]
   [:set, :title, "rand uniform vs normal"],
   [:set, :key, :left, :top],
@@ -65,8 +65,8 @@ Write two datasets to a PNG file:
       ["-", :title, "normal", :with, :points])]
   ],
   [
-        for(n <- 0..200, do: [n, n * :rand.uniform()]),
-        for(n <- 0..200, do: [n, n * :rand.normal()])
+        for(n <- 0..100, do: [n, n * :rand.uniform()]),
+        for(n <- 0..100, do: [n, n * :rand.normal()])
   ])
 ```
 

docs/rand.PNG

@@ -20,7 +20,8 @@ defmodule AtanSin do
         :plot,
         -30..20,
         'sin(x*20)*atan(x)',
-        :ls, 1
+        :ls,
+        1
       ]
     ]
 

examples/atan_sin.exs

@@ -7,26 +7,28 @@ defmodule Rand do
 
   def target,
     do: [
-      [:set, :term, :png, :size, '512,256', :font, "/Library/Fonts/FiraCode-Medium.ttf", 12],
+      [:set, :term, :pngcairo, :size, '512,256', :font, "Fira Sans,12"],
       [:set, :output, png()]
     ]
 
   def commands,
     do: [
       ~w(set key left top)a,
+      ~w(set style line 1 lc rgb '#77216F' pt 13)a,
+      ~w(set style line 2 lc rgb '#599B2B' pt 2)a,
       [
         :plot,
         G.list(
-          ["-", :title, "uniform", :with, :points],
-          ["-", :title, "normal", :with, :points]
+          ["-", :title, "uniform", :with, :points, :ls, 1],
+          ["-", :title, "normal", :with, :points, :ls, 2]
         )
       ]
     ]
 
   def data,
     do: [
-      for(n <- 0..196, do: [n, n * :rand.uniform()]),
-      for(n <- 0..196, do: [n, n * :rand.normal()])
+      for(n <- 0..99, do: [n, n * :rand.uniform()]),
+      for(n <- 0..99, do: [n, n * :rand.normal()])
     ]
 
   def plot, do: G.plot(target() ++ commands(), data())

examples/rand.exs

@@ -7,7 +7,7 @@ defmodule Sine do
 
   def target,
     do: [
-      [:set, :term, :pngcairo, :size, '512,256' ,:font, "Fira Sans"],
+      [:set, :term, :pngcairo, :size, '512,256', :font, "Fira Sans"],
       [:set, :output, png()]
     ]