Broken axes is a common used feature in many scientific plots.
There are some examples on the web on how to achieve it through manually drawing the axes and modify the data:
But there are many parameters, e.g. the height of the broken indicating arrow, that has to be frequently tuned when plotting different data. It is even more different to tune these parameters when using log scale on axes.
It would be nice if gnuplot can natively support broken axes both on x and y axes for both normal scale and log scale.