Sure. Use a variable instead of a static value, like [plot some_array 0
1 0 0 x-spacing], and make sure x-spacing is in the relevant [struct] object. Then use [set] to change x-spacing.Unfortunately, you still can't do x0(0:max-px)(0:max), or x0(0:100) (0:100)(q), though you could hack your way around the latter using the outlet from [struct].
of course, was doing it in the wrong struct. thanks.