Pixels is a plot object that can be used to visualize large data sets of scattered points.

When you have large data sets, some of the data points may overlap (i.e. they are drawn at the same pixel). In this case, you can display them as an adaptive histogram: The Pixels object automatically counts the number of data points that overlap in a single pixel. This data can then be used to change the color and/or opacity of the pixels. Kontrast automatically updates the number of overlapping data points (the 'count') whenever the axis limits, axis mappings or the data itself is changed. See also Example: Pixel plot.

Data input

Valid data for a pixel-plot can be either an array of numbers or a single number, assigned to an axis.

For color and opacity axes, you can use the special value 'count' instead of a number or an array. This indicates to Kontrast that the count of data points overlapping in each pixel is used as data for the specific axis.


Please also refer to the documentation for all plot objects.