While doing a course in statistics I came across the issue where numbers approaching 0 appear as letters instead of their numerical representation when using imshow for heatmaps.

Such as ending in ‘f’ for ‘OP1 - OP4’ and ‘n’ for ‘OP3 - OP4’ as seen below. Is there a way to fix this? While not dealbreaking, since Dunn’s test doesn’t benefit from displaying values below 0.01, it is still weird and unexpected behavior...

Screenshot from Plotly:

Screenshot from console log: