[use case] Returns the chart as a byte encoded PNG image.
Returns the chart as a byte encoded PNG image.
[use case] Saves the chart as a PNG image.
Saves the chart as a PNG image.
the output file
[use case] Writes the chart as a PNG image to the output stream.
Writes the chart as a PNG image to the output stream.
stream to where will be written
Exports charts to PNG images.
module.Exporting