How to bind keyboard keys as gamepad joystick axis?

[quidamphx]

I've worked my way through input-remapper-control --symbol-names and can't find a setting to do this.

I want to use WASD as a typical left stick X/Y axis on a gamepad. What's the command to do this?

I've found basically everything else gamepad related under BTN_ in the above list but can't figure out how to choose the left or right stick, or even the relevant axis for mapping. As the output in this case is set to a key or button, I assume I'd move onto analog axis output and do it there.

If I choose analog axis as the output, gamepad as the target and then choose the axis, there's no separation between them so I can't choose X- separately from X+, etc. I want to bind A as Axis 0-, D as Axis 0+, W as Axis 1+, S as Axis 1-. This might also be referred to as X-/+ and Y-/+ but I can't find either.

I figured out how to map an analog axis using mouse movement but the keyboard part has me stumped. I'm probably missing something really obvious but I can't find it.