v0.2.7

Uplot should expect cases where data takes a long time to reach the standard input.
This mechanism is not appropriate.

This reverts commit c40c59a21d.

README.md

@@ -9,8 +9,6 @@ Create ASCII charts on the terminal with data from standard streams in the pipel
 
 :bar_chart: Powered by [UnicodePlot](https://github.com/red-data-tools/unicode_plot.rb)
 
-:construction: Under development! :construction:
-
 ## Installation
 
 ```
@@ -26,42 +24,57 @@ ruby -r numo/narray -e "puts Numo::DFloat.new(1000).rand_norm.to_a" \
   | uplot hist --nbins 15
 ```
 
+<img src="https://i.imgur.com/wpsoGJq.png" width="75%" height="75%">
+
+```sh
+echo "from numpy import random;" \
+     "n = random.randn(10000);"  \
+     "print('\n'.join(str(i) for i in n))" \
+| python \
+| uplot hist --nbins 20
 ```
-                ┌                                        ┐ 
-   [-4.5, -4.0) ┤ 1                                        
-   [-4.0, -3.5) ┤ 0                                        
-   [-3.5, -3.0) ┤ 1                                        
-   [-3.0, -2.5) ┤▇▇ 9                                      
-   [-2.5, -2.0) ┤▇▇▇ 15                                    
-   [-2.0, -1.5) ┤▇▇▇▇▇▇▇▇▇ 50                              
-   [-1.5, -1.0) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 97                     
-   [-1.0, -0.5) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 154          
-   [-0.5,  0.0) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 193   
-   [ 0.0,  0.5) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 165        
-   [ 0.5,  1.0) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 152          
-   [ 1.0,  1.5) ┤▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 86                       
-   [ 1.5,  2.0) ┤▇▇▇▇▇▇▇▇▇ 51                              
-   [ 2.0,  2.5) ┤▇▇▇▇ 21                                   
-   [ 2.5,  3.0) ┤▇ 3                                       
-   [ 3.0,  3.5) ┤ 2                                        
-                └                                        ┘ 
-                                Frequency
-```
+
+<img src="https://i.imgur.com/97R2MQx.png" width="75%" height="75%">
 
 **scatter**
 
 ```sh
-wget https://raw.githubusercontent.com/uiuc-cse/data-fa14/gh-pages/data/iris.csv -qO - \
- | cut -f1-4 -d, \
- | uplot scatter -H -d, -t IRIS -m 10
+curl -s https://raw.githubusercontent.com/uiuc-cse/data-fa14/gh-pages/data/iris.csv \
+| cut -f1-4 -d, \
+| uplot scatter -H -d, -t IRIS
 ```
 
+<img src="https://i.imgur.com/STX7bFT.png" width="75%" height="75%">
+
+**line**
+
+```sh
+curl -s https://www.mhlw.go.jp/content/pcr_positive_daily.csv \
+| cut -f2 -d, \
+| uplot line -w 50 -h 15 -t 'PCR positive tests' --xlabel Date --ylabel number
+```
+
+<img src="https://i.imgur.com/PVl5dsa.png" width="75%" height="75%">
+
+**box**
+
+```sh
+curl -s https://raw.githubusercontent.com/uiuc-cse/data-fa14/gh-pages/data/iris.csv \
+| cut -f1-4 -d, \
+| uplot box -H -d, -t IRIS
+```
+
+<img src="https://i.imgur.com/sNI4SmN.png" width="75%" height="75%">
+
+
 ## Development
 
+Let's keep it simple.
+
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at [https://github.com/kojix2/uplot](https://github.com/kojix2/uplot).
 
 ## License
 
-The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).
+[MIT License](https://opensource.org/licenses/MIT).

lib/uplot/command.rb

@@ -25,10 +25,10 @@ module Uplot
       delimiter = parser.delimiter
       transpose = parser.transpose
       headers   = parser.headers
+      pass      = parser.pass
       output    = parser.output
-      count     = parser.count
       fmt       = parser.fmt
-      debug     = parser.debug
+      @debug    = parser.debug
 
       if command == :colors
         Plot.colors
@@ -36,33 +36,47 @@ module Uplot
       end
 
       # Sometimes the input file does not end with a newline code.
-      while input = Kernel.gets(nil)
+      while (input = Kernel.gets(nil))
         input.freeze
         @raw_inputs << input
         @data = Preprocessing.input(input, delimiter, headers, transpose)
         pp @data if @debug
-        case command
-        when :bar, :barplot
-          Plot.barplot(data, params, @count)
-        when :count, :c
-          Plot.barplot(data, params, count = true)
-        when :hist, :histogram
-          Plot.histogram(data, params)
-        when :line, :lineplot
-          Plot.line(data, params)
-        when :lines, :lineplots
-          Plot.lines(data, params, fmt)
-        when :scatter, :s
-          Plot.scatter(data, params, fmt)
-        when :density, :d
-          Plot.density(data, params, fmt)
-        when :box, :boxplot
-          Plot.boxplot(data, params)
-        else
-          raise "unrecognized plot_type: #{command}"
-        end.render($stderr)
+        plot = case command
+               when :bar, :barplot
+                 Plot.barplot(data, params)
+               when :count, :c
+                 Plot.barplot(data, params, count: true)
+               when :hist, :histogram
+                 Plot.histogram(data, params)
+               when :line, :lineplot
+                 Plot.line(data, params)
+               when :lines, :lineplots
+                 Plot.lines(data, params, fmt)
+               when :scatter, :s
+                 Plot.scatter(data, params, fmt)
+               when :density, :d
+                 Plot.density(data, params, fmt)
+               when :box, :boxplot
+                 Plot.boxplot(data, params)
+               else
+                 raise "unrecognized plot_type: #{command}"
+               end
 
-        print input if output
+        if output.is_a?(IO)
+          plot.render(output)
+        else
+          File.open(output, 'w') do |f|
+            plot.render(f)
+          end
+        end
+
+        if pass.is_a?(IO)
+          print input
+        elsif pass
+          File.open(pass, 'w') do |f|
+            f.print(input)
+          end
+        end
       end
     end
   end

lib/uplot/command/params.rb

@@ -2,6 +2,11 @@
 
 module Uplot
   class Command
+    # UnicodePlot parameters.
+    # * Normally in a Ruby program, you might use hash for the parameter object.
+    # * Here, I use Struct for 2 safety reason.
+    # * The keys are static in Struct.
+    # * Struct does not conflict with keyword arguments. Hash dose.
     Params = Struct.new(
       # Sort me!
       :title,

lib/uplot/command/parser.rb

@@ -7,68 +7,76 @@ module Uplot
   class Command
     class Parser
       attr_reader :command, :params,
-                  :delimiter, :transpose, :headers, :output, :count, :fmt, :debug
+                  :delimiter, :transpose, :headers, :pass, :output, :fmt, :debug
 
       def initialize
-        @command = nil
-        @params = Params.new
+        @command   = nil
+        @params    = Params.new
 
-        @delimiter  = "\t"
-        @transpose  = false
-        @headers    = nil
-        @output     = false
-        @count      = false
-        @fmt        = 'xyy'
-        @debug      = false
+        @delimiter = "\t"
+        @transpose = false
+        @headers   = nil
+        @pass      = false
+        @output    = $stderr
+        @fmt       = 'xyy'
+        @debug     = false
       end
 
       def create_default_parser
         OptionParser.new do |opt|
-          opt.program_name = 'uplot'
-          opt.version = Uplot::VERSION
-          opt.on('-O', '--output', TrueClass) do |v|
+          opt.program_name  = 'uplot'
+          opt.version       = Uplot::VERSION
+          opt.summary_width = 24
+          opt.on_tail('') # Add a blank line at the end
+          opt.separator('')
+          opt.on('Options:')
+          opt.on('-O', '--pass [VAL]', 'file to output standard input data to [stdout]',
+                 'for inserting uplot in the middle of Unix pipes') do |v|
+            @pass = v || $stdout
+          end
+          opt.on('-o', '--output VAL', 'file to output results to [stderr]') do |v|
             @output = v
           end
-          opt.on('-d', '--delimiter VAL', 'use DELIM instead of TAB for field delimiter', String) do |v|
+          opt.on('-d', '--delimiter VAL', String, 'use DELIM instead of TAB for field delimiter') do |v|
             @delimiter = v
           end
-          opt.on('-H', '--headers', 'specify that the input has header row', TrueClass) do |v|
+          opt.on('-H', '--headers', TrueClass, 'specify that the input has header row') do |v|
             @headers = v
           end
           opt.on('-T', '--transpose', TrueClass) do |v|
             @transpose = v
           end
-          opt.on('-t', '--title VAL', 'print string on the top of plot', String) do |v|
+          opt.on('-t', '--title VAL', String, 'print string on the top of plot') do |v|
             params.title = v
           end
-          opt.on('-x', '--xlabel VAL', 'print string on the bottom of the plot', String) do |v|
+          opt.on('-x', '--xlabel VAL', String, 'print string on the bottom of the plot') do |v|
             params.xlabel = v
           end
-          opt.on('-y', '--ylabel VAL', 'print string on the far left of the plot', String) do |v|
+          opt.on('-y', '--ylabel VAL', String, 'print string on the far left of the plot') do |v|
             params.ylabel = v
           end
-          opt.on('-w', '--width VAL', 'number of characters per row', Integer) do |v|
+          opt.on('-w', '--width VAL', Integer, 'number of characters per row') do |v|
             params.width = v
           end
-          opt.on('-h', '--height VAL', 'number of rows', Numeric) do |v|
+          opt.on('-h', '--height VAL', Numeric, 'number of rows') do |v|
             params.height = v
           end
-          opt.on('-b', '--border VAL', 'specify the style of the bounding box', String) do |v|
+          opt.on('-b', '--border VAL', String, 'specify the style of the bounding box') do |v|
             params.border = v.to_sym
           end
-          opt.on('-m', '--margin VAL', 'number of spaces to the left of the plot', Numeric) do |v|
+          opt.on('-m', '--margin VAL', Numeric, 'number of spaces to the left of the plot') do |v|
             params.margin = v
           end
-          opt.on('-p', '--padding VAL', 'space of the left and right of the plot', Numeric) do |v|
+          opt.on('-p', '--padding VAL', Numeric, 'space of the left and right of the plot') do |v|
             params.padding = v
           end
-          opt.on('-c', '--color VAL', 'color of the drawing', String) do |v|
+          opt.on('-c', '--color VAL', String, 'color of the drawing') do |v|
             params.color = v =~ /\A[0-9]+\z/ ? v.to_i : v.to_sym
           end
-          opt.on('--[no-]labels', 'hide the labels', TrueClass) do |v|
+          opt.on('--[no-]labels', TrueClass, 'hide the labels') do |v|
             params.labels = v
           end
-          opt.on('--fmt VAL', 'xyy, xyxy', String) do |v|
+          opt.on('--fmt VAL', String, 'xyxy : header is like x1, y1, x2, y2, x3, y3...', 'xyy  : header is like x, y1, y2, y2, y3...') do |v|
             @fmt = v
           end
           opt.on('--debug', TrueClass) do |v|
@@ -83,20 +91,22 @@ module Uplot
           # Usage and help messages
           main_parser.banner = \
             <<~MSG
+              
               Program: uplot (Tools for plotting on the terminal)
-              Version: #{Uplot::VERSION} (using unicode_plot #{UnicodePlot::VERSION})
+              Version: #{Uplot::VERSION} (using UnicodePlot #{UnicodePlot::VERSION})
+              Source:  https://github.com/kojix2/uplot
 
               Usage:   uplot <command> [options]
 
-              Command: barplot    bar
-                       histogram  hist
-                       lineplot   line
-                       scatter    s
-                       density    d
-                       boxplot    box
-                       colors
-
-              Options:
+              Commands:
+                  barplot    bar
+                  histogram  hist
+                  lineplot   line
+                  lineplots  lines
+                  scatter    s
+                  density    d
+                  boxplot    box
+                  colors
             MSG
         end
       end
@@ -104,9 +114,10 @@ module Uplot
       def sub_parser
         @sub_parser ||= create_default_parser do |parser|
           parser.banner = <<~MSG
+
             Usage: uplot #{command} [options]
 
-            Options:
+            Options for #{command}:
           MSG
 
           case command
@@ -115,83 +126,80 @@ module Uplot
             exit 1
 
           when :barplot, :bar
-            parser.on('--symbol VAL', String) do |v|
+            parser.on_head('--symbol VAL', String, 'character to be used to plot the bars') do |v|
               params.symbol = v
             end
-            parser.on('--xscale VAL', String) do |v|
+            parser.on_head('--xscale VAL', String, 'axis scaling') do |v|
               params.xscale = v
             end
-            parser.on('--count', TrueClass) do |v|
-              @count = v
-            end
 
           when :count, :c
-            parser.on('--symbol VAL', String) do |v|
+            parser.on_head('--symbol VAL', String, 'character to be used to plot the bars') do |v|
               params.symbol = v
             end
 
           when :histogram, :hist
-            parser.on('-n', '--nbins VAL', Numeric) do |v|
+            parser.on_head('-n', '--nbins VAL', Numeric, 'approximate number of bins') do |v|
               params.nbins = v
             end
-            parser.on('--closed VAL', String) do |v|
+            parser.on_head('--closed VAL', String) do |v|
               params.closed = v
             end
-            parser.on('--symbol VAL', String) do |v|
+            parser.on_head('--symbol VAL', String, 'character to be used to plot the bars') do |v|
               params.symbol = v
             end
 
           when :lineplot, :line
-            parser.on('--canvas VAL', String) do |v|
+            parser.on_head('--canvas VAL', String, 'type of canvas') do |v|
               params.canvas = v
             end
-            parser.on('--xlim VAL', Array) do |v|
+            parser.on_head('--xlim VAL', Array, 'plotting range for the x coordinate') do |v|
               params.xlim = v.take(2)
             end
-            parser.on('--ylim VAL', Array) do |v|
+            parser.on_head('--ylim VAL', Array, 'plotting range for the y coordinate') do |v|
               params.ylim = v.take(2)
             end
 
           when :lineplots, :lines
-            parser.on('--canvas VAL', String) do |v|
+            parser.on_head('--canvas VAL', String) do |v|
               params.canvas = v
             end
-            parser.on('--xlim VAL', Array) do |v|
+            parser.on_head('--xlim VAL', Array, 'plotting range for the x coordinate') do |v|
               params.xlim = v.take(2)
             end
-            parser.on('--ylim VAL', Array) do |v|
+            parser.on_head('--ylim VAL', Array, 'plotting range for the y coordinate') do |v|
               params.ylim = v.take(2)
             end
 
           when :scatter, :s
-            parser.on('--canvas VAL', String) do |v|
+            parser.on_head('--canvas VAL', String) do |v|
               params.canvas = v
             end
-            parser.on('--xlim VAL', Array) do |v|
+            parser.on_head('--xlim VAL', Array, 'plotting range for the x coordinate') do |v|
               params.xlim = v.take(2)
             end
-            parser.on('--ylim VAL', Array) do |v|
+            parser.on_head('--ylim VAL', Array, 'plotting range for the y coordinate') do |v|
               params.ylim = v.take(2)
             end
 
           when :density, :d
-            parser.on('--grid', TrueClass) do |v|
+            parser.on_head('--grid', TrueClass) do |v|
               params.grid = v
             end
-            parser.on('--xlim VAL', Array) do |v|
+            parser.on_head('--xlim VAL', Array, 'plotting range for the x coordinate') do |v|
               params.xlim = v.take(2)
             end
-            parser.on('--ylim VAL', Array) do |v|
+            parser.on_head('--ylim VAL', Array, 'plotting range for the y coordinate') do |v|
               params.ylim = v.take(2)
             end
 
           when :boxplot, :box
-            parser.on('--xlim VAL', Array) do |v|
+            parser.on_head('--xlim VAL', Array, 'plotting range for the x coordinate') do |v|
               params.xlim = v.take(2)
             end
 
           when :colors
-            parser.on('-n', '--names', TrueClass) do |v|
+            parser.on_head('-n', '--names', TrueClass) do |v|
               @color_names = v
             end
 
@@ -221,4 +229,4 @@ module Uplot
       end
     end
   end
-end
+end

lib/uplot/plot.rb

@@ -7,7 +7,7 @@ module Uplot
   module Plot
     module_function
 
-    def barplot(data, params, count = false)
+    def barplot(data, params, count: false)
       headers = data.headers
       series = data.series
       if count
@@ -53,7 +53,7 @@ module Uplot
       (method1.to_s + '!').to_sym
     end
 
-    def xyy_plot(data, method1, params)
+    def plot_xyy(data, method1, params)
       headers = data.headers
       series = data.series
       method2 = get_method2(method1)
@@ -70,7 +70,7 @@ module Uplot
       plot
     end
 
-    def xyxy_plot(data, method1, params)
+    def plot_xyxy(data, method1, params)
       headers = data.headers
       series = data.series
       method2 = get_method2(method1)
@@ -87,34 +87,30 @@ module Uplot
       plot
     end
 
-    def lines(data, params, fmt = 'xyy')
-      check_series_size(data, fmt)
+    def plot_fmt(data, fmt, method1, params)
       case fmt
       when 'xyy'
-        xyy_plot(data, :lineplot, params)
+        plot_xyy(data, method1, params)
       when 'xyxy'
-        xyxy_plot(data, :lineplot, params)
+        plot_xyxy(data, method1, params)
+      else
+        raise "Unknown format: #{fmt}"
       end
     end
 
+    def lines(data, params, fmt = 'xyy')
+      check_series_size(data, fmt)
+      plot_fmt(data, fmt, :lineplot, params)
+    end
+
     def scatter(data, params, fmt = 'xyy')
       check_series_size(data, fmt)
-      case fmt
-      when 'xyy'
-        xyy_plot(data, :scatterplot, params)
-      when 'xyxy'
-        xyxy_plot(data, :scatterplot, params)
-      end
+      plot_fmt(data, fmt, :scatterplot, params)
     end
 
     def density(data, params, fmt = 'xyy')
       check_series_size(data, fmt)
-      case fmt
-      when 'xyy'
-        xyy_plot(data, :densityplot, params)
-      when 'xyxy'
-        xyxy_plot(data, :densityplot, params)
-      end
+      plot_fmt(data, fmt, :densityplot, params)
     end
 
     def boxplot(data, params)

lib/uplot/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Uplot
-  VERSION = '0.2.4'
+  VERSION = '0.2.7'
 end

uplot.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |spec|
   MSG
   spec.homepage      = 'https://github.com/kojix2/uplot'
   spec.license       = 'MIT'
-  spec.required_ruby_version = Gem::Requirement.new('>= 2.3.0')
+  spec.required_ruby_version = Gem::Requirement.new('>= 2.4.0')
 
   spec.files         = Dir['*.{md,txt}', '{lib,exe}/**/*']
   spec.bindir        = 'exe'