Different scales for x and y axis

[VinzentRisch]

It would be great to be able to change the scale of the x and y measure to a log scale.
That could be done with two additional menu drop downs where you change the scale.
This can be done in Vega look here: https://vega.github.io/vega/docs/scales/#quantitative

[VinzentRisch]

Hey @lizgehret I had a look at this and it is not possible to change the scale with a signal. So to change it the spec has to be recreated and embedded again. So it seems there is no way to get around it anyway and it could also be the way to go for the differing legends in #97.