3 related questions: formatting heatmap axis/internal numbers in scientific notation or other notation?

How might one format the (a) axis numbers in, say, scientific notation, (b) the numbers in the heatmap cells, and © the width of the cells in the heatmap? The picture attached shows that none of these are optimal (I’d love to get, say, scientific notation with 2 digits after the decimal on the axes; if that can be done in Pandas in some way I can probably do that; the internal cells ought to be integers, I think; and they’re too wide.)

vega-lite had a hacky solution for © at some point that may have been resolved, "config": { "textCellWidth": 28 }.

Examples of these in the gallery would be great.

[kanitw]

Note that in VL 2.0, we will introduce rect mark, which will allow you to create a heatmap without text in a more sensible way. (No need to use the text mark and set the text channel to empty text!) 😃

[LukeMathWalker]

Sorry, I phrased my issue poorly. I am already using rect for my heatmap, and it works wonderfully. I run into a problem when I try to add a text label on top of each square: they become long rectangles and I haven’t been able to “resize” them to be just big enough to contain the text that I am displaying.

I have searched the docs and I haven’t found anything that could point me in the right direction - I thought those properties (textBandWitdth and bandSize) were relevant for this issue I am having. @jakevdp