Version

4.7.0

Steps to reproduce

1. Create a smoothed line chart with yAxis of type "log" instead of "value", and "min" option to its default of 0.
2. Enter a series with or without zero values and some values above, say, 100

What is expected?

A graph should appear with minimum yAxis unlabeled or 1 and a maximum yAxis of DataMax, with an uninterrupted smooth line dipping down to the minimum in correspondence with zero values.

What is actually happening?

A graph appears with maximum yAxis of 10, with an interrupted line with blanks in correspondence of zero values. If all values are above 10, then the graph appears to be empty.

There is no "correct" behaviour since you cannot plot values below or equal to zero in a logarithmic chart. Nonetheless, in the interest of user experience, such illegal values should be treated reasonably - for example considered equal to max("0.01", dataMin) if absolutely nothing else works.

This is probably connected with bug #9801 (in both cases zero values determine "strange" behaviour).