Attached Histogram to Chart

Ignition
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1

What would be the best way to present a histogram to correlate with chart subplots?
See to the right of this image...

image
image907×259 54.8 KB

2

Huh. Probably have to lay a paintable canvas on top.

It's a great idea for inclusion in my NoteChart module. I'll put this on my to-do list.

3

Interesting, but what is the histogram trying to tell me?

4

It's helpful with Statistical Process Control, to "see" how tightly a signal is conforming to a setpoint.

5

Something quick and dirty (mostly dirty) using two charts.
Assumes all dataset names match in each chart.

Chart_plus_Histogram_2024-01-18_1444.zip (16.1 KB)

image

Script in button:

from collections import Counter

mainChart = event.source.parent.getComponent('Chart')
histogram = event.source.parent.getComponent('Histogram')

xyPlot = mainChart.chart.getXYPlot()

for plot in xyPlot.subplots:

	datasetName = plot.dataset.name
	dataIn = getattr(mainChart, datasetName)
	counter = Counter(dataIn.getColumnAsList(1))
	dataOut = [[key, val] for key, val in sorted(counter.items())]
	setattr(histogram, datasetName, system.dataset.toDataSet(['x','y'], dataOut))
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