I'm showing a multilines graph using this search:
sourcetype="mysource" thefield="x" or thefield="y" or thefield="z" | timechart span=1d count by thefield
The graph is showing 2 lines one for x and one for y because there are no values that is equal to "z".
I need to show 3 lines x,y,z on the graph and consider z as zero.
How to do that?