double y-axis waveform graph: How change axis label programatically

[_Faust]

Im using the waveform graph to show data from experiments. The user can select channels to display; I've made 2 y axis to display 2 channels.

I would like the y-axis label to change for different channels. With an XY-graph I did this through a property node, but I cant find them for the separate y-axis for the 

waveform graph.

how to achieve?

thanks

[Ben · Accepted solution]

Are you setting the Active Y scale first?

Post an image of your code so we can look over your shoulder and comment.

Ben

[_Faust]

That was the solution THANKS! I didnt even know what that property was for. I used it to switch from 0 to 1 (other axis).