Tk Library Source Code

Plotting with the plotcumulative does not have the desired effect: stacking the bars, as illustrated by this little program:

# xx.tcl --
#     Check plotcumulative method
#
package require Plotchart
pack [canvas .c]
set p [::Plotchart::createHistogram .c {0 10 2} {0 10 2}]

$p dataconfig data  -fillcolour green
$p dataconfig data2 -fillcolour red
$p plot           data  0.0 1.0
$p plotcumulative data2 0.0 1.0
$p plot           data  1.0 1.0
$p plotcumulative data2 1.0 2.0

Instead of a red bar on top of a green bar you get a single red bar

Indeed, I need to repair this method or remove it - see also https://core.tcl-lang.org/tklib/tktview/a6dd880cf2d9a2db1b45ca81f9e885916ad8e8e6