topic Re: Remove gridlines in heatmap in Discussions

Remove gridlines in heatmap

OleksandrG — Tue, 30 Dec 2025 05:24:46 GMT

Heatmap with categorical x, y, Color variables shows gridlines even when axis settings and plot customization settings are set to disable. They are barely visible when there are a few units on x and y axes, but show up very well on a larger map with dozens of units.

It follows background color; it sometimes changes as I rescale the graph builder window (rendering?).

How do I disable it?

JMP 18.1.1

Re: Remove gridlines in heatmap

Craige_Hales — Tue, 30 Dec 2025 19:48:08 GMT

I think it is an unintentional artifact rather than a purposeful line that can be removed. It's possible that saving it to a SVG file will give you the image you need. But that might depend on the software that renders the SVG. (SVG is a vector format rather than a pixel format and not all SVG rendering packages use the same rules.) PDF might also be a good choice.

It's also possible there is a preference (probably under windows-specific, try the hardware accelerated one) that might turn off the anti-aliasing behavior that might be triggering the problem. I suspect the rectangle borders are half way between pixels and the OS is fading the edge pixels toward the background color...maybe even on both adjacent rectangles.

Re: Remove gridlines in heatmap

John_Powell_JMP — Thu, 01 Jan 2026 14:43:22 GMT

Hello @OleksandrG ,

Interactive HTML with Data is an export format that avoids the artifact that @Craige_Hales mentioned.

It is the format used in JMP Live and JMP Public.

~John

Re: Remove gridlines in heatmap

John_Powell_JMP — Thu, 01 Jan 2026 14:27:29 GMT

Hello @OleksandrG ,

Interactive HTML with Data is an export format that avoids the artifact that @Craige_Hales mentioned.

~John