namespace import loon::*
# extract variables
dict for {name value} $loon::data::olive {set $name $value}

set h [histogram -x $oleic -xlabel oleic]

or alternatively

set h [loon::histogram -x [dict get $loon::data::olive oleic] -xlabel oleic]

Histogram

• Get the state names with

  set states [$h info states]
  dict keys $states

• Query a state, say showBinHandle, as follows

  $h cget -showBinHandle

• Change a state, say again showBinHandle, as follows

  $h configure -showBinHandle FALSE

• When creating a plot you may specify any state at plot creation

  set h1 [histogram -x $oleic, -showBinHandle FALSE\
      -yshows density -color $Area -showStackedColors TRUE]

• details on a state, say showBinHandle, is easily had with

  set states [$h info states]
  dict get $states showBinHandle

  and a particular field

  dict get $states showBinHandle description

Good To Know

• When changing yshows to frequency or density per command line, you probably have to re-scale the plot as the y ranges of the histogram visualization changes

  $h scaleto world 

When changing yshows via the inspector the rescaling happens automatically.

• When changing the bin handles when yshows is density the histogram is re-scaled every time the bin handle changes.

• The histogram display supports layers.