Module: YouPlot::Backends::UnicodePlotBackend

Defined in:
lib/youplot/backends/unicode_plot_backend.rb

Defined Under Namespace

Classes: Error

Class Method Summary collapse

Class Method Details

.barplot(data, params, fmt = nil, count: false) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 14

def barplot(data, params, fmt = nil, count: false)
  headers = data.headers
  series = data.series
  # `uplot count`
  if count
    series = Processing.count_values(series[0])
    params.title = headers[0] if headers
  end
  if series.size == 1
    # If there is only one series.use the line number for label.
    params.title ||= headers[0] if headers
    labels = Array.new(series[0].size) { |i| (i + 1).to_s }
    values = series[0].map(&:to_f)
  else
    # If there are 2 or more series...
    if fmt == 'yx'
      # assume that the first 2 series are the y and x series respectively.
      x_col = 1
      y_col = 0
    else
      # assume that the first 2 series are the x and y series respectively.
      x_col = 0
      y_col = 1
    end
    params.title ||= headers[y_col] if headers
    labels = series[x_col]
    values = series[y_col].map(&:to_f)
  end
  begin
    UnicodePlot.barplot(labels, values, **params.to_hc)
  # UnicodePlot error:
  # All values have to be positive. Negative bars are not supported.
  rescue ArgumentError => e
    if YouPlot.run_as_executable?
      warn e.backtrace[0]
      warn "\e[35m#{e}\e[0m"
      exit 1
    else
      raise e
    end
  end
end

.boxplot(data, params) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 162

def boxplot(data, params)
  headers = data.headers
  series = data.series
  headers ||= (1..series.size).map(&:to_s)
  series.map! { |s| s.map(&:to_f) }
  UnicodePlot.boxplot(headers, series, **params.to_hc)
end

.check_series_size(data, fmt) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 190

def check_series_size(data, fmt)
  series = data.series
  if series.size == 1
    warn 'youplot: There is only one series of input data. Please check the delimiter.'
    warn ''
    warn "  Headers: \e[35m#{data.headers.inspect}\e[0m"
    warn "  The first item is: \e[35m\"#{series[0][0]}\"\e[0m"
    warn "  The last item is : \e[35m\"#{series[0][-1]}\"\e[0m"
    YouPlot.run_as_executable ? exit(1) : raise(Error)
  end
  if fmt == 'xyxy' && series.size.odd?
    warn 'YouPlot: In the xyxy format, the number of series must be even.'
    warn ''
    warn "  Number of series: \e[35m#{series.size}\e[0m"
    warn "  Headers: \e[35m#{data.headers.inspect}\e[0m"
    YouPlot.run_as_executable ? exit(1) : raise(Error)
  end
end

.colors(color_names = false) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 170

def colors(color_names = false)
  # FIXME
  s = String.new
  UnicodePlot::StyledPrinter::TEXT_COLORS.each do |k, v|
    s << v
    s << k.to_s
    unless color_names
      s << "\t"
      s << '  ●'
    end
    s << "\033[0m"
    s << "\t"
  end
  s << "\n"
  def s.render(obj)
    obj.print(self)
  end
  s
end

.density(data, params, fmt = 'xyy') ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 157

def density(data, params, fmt = 'xyy')
  check_series_size(data, fmt)
  plot_fmt(data, fmt, :densityplot, params)
end

.get_method2(method1) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 94

def get_method2(method1)
  "#{method1}!".to_sym
end

.histogram(data, params) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 57

def histogram(data, params)
  headers = data.headers
  series = data.series
  params.title ||= data.headers[0] if headers
  values = series[0].map(&:to_f)
  UnicodePlot.histogram(values, **params.to_hc)
end

.line(data, params, fmt = nil) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 65

def line(data, params, fmt = nil)
  headers = data.headers
  series = data.series
  if series.size == 1
    # If there is only one series, it is assumed to be sequential data.
    params.ylabel ||= headers[0] if headers
    y = series[0].map(&:to_f)
    UnicodePlot.lineplot(y, **params.to_hc)
  else
    # If there are 2 or more series...
    if fmt == 'yx'
      # assume that the first 2 series are the y and x series respectively.
      x_col = 1
      y_col = 0
    else
      # assume that the first 2 series are the x and y series respectively.
      x_col = 0
      y_col = 1
    end
    if headers
      params.xlabel ||= headers[x_col]
      params.ylabel ||= headers[y_col]
    end
    x = series[x_col].map(&:to_f)
    y = series[y_col].map(&:to_f)
    UnicodePlot.lineplot(x, y, **params.to_hc)
  end
end

.lines(data, params, fmt = 'xyy') ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 147

def lines(data, params, fmt = 'xyy')
  check_series_size(data, fmt)
  plot_fmt(data, fmt, :lineplot, params)
end

.plot_fmt(data, fmt, method1, params) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 134

def plot_fmt(data, fmt, method1, params)
  case fmt
  when 'xyy'
    plot_xyy(data, method1, params)
  when 'xyxy'
    plot_xyxy(data, method1, params)
  when 'yx'
    raise "Incorrect format: #{fmt}"
  else
    raise "Unknown format: #{fmt}"
  end
end

.plot_xyxy(data, method1, params) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 116

def plot_xyxy(data, method1, params)
  headers = data.headers
  series = data.series
  method2 = get_method2(method1)
  series.map! { |s| s.map(&:to_f) }
  series2 = series.each_slice(2).to_a
  series = nil
  params.name ||= headers[0] if headers
  params.xlim ||= series2.map(&:first).flatten.minmax # why need?
  params.ylim ||= series2.map(&:last).flatten.minmax # why need?
  x1, y1 = series2.shift
  plot = UnicodePlot.public_send(method1, x1, y1, **params.to_hc)
  series2.each_with_index do |(xi, yi), i|
    UnicodePlot.public_send(method2, plot, xi, yi, name: headers&.[]((i + 1) * 2))
  end
  plot
end

.plot_xyy(data, method1, params) ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 98

def plot_xyy(data, method1, params)
  headers = data.headers
  series = data.series
  method2 = get_method2(method1)
  series.map! { |s| s.map(&:to_f) }
  if headers
    params.name   ||= headers[1]
    params.xlabel ||= headers[0]
  end
  params.xlim ||= series[0].flatten.minmax # why need?
  params.ylim ||= series[1..-1].flatten.minmax # why need?
  plot = UnicodePlot.public_send(method1, series[0], series[1], **params.to_hc)
  2.upto(series.size - 1) do |i|
    UnicodePlot.public_send(method2, plot, series[0], series[i], name: headers&.[](i))
  end
  plot
end

.scatter(data, params, fmt = 'xyy') ⇒ Object 



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# File 'lib/youplot/backends/unicode_plot_backend.rb', line 152

def scatter(data, params, fmt = 'xyy')
  check_series_size(data, fmt)
  plot_fmt(data, fmt, :scatterplot, params)
end