Generates the chart as an image in memory.
The format argument specifies the image format to use, and must be one of the following constants:
Constant | Value | Description |
---|
PNG | 0 | The PNG format. |
GIF | 1 | The GIF format. |
JPG | 2 | The JPEG format. |
BMP | 4 | The BMP format. |
SVG | 5 | The SVG format. |
SVGZ | 6 | The compressed SVG format. |
PDF | 7 | The PDF format. |
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