y.y([y]) If y is specified, sets the y-coordinate accessor to the specified number or function, re-evaluates

collide.radius([radius]) If radius is specified, sets the radius accessor to the specified number or function

force(alpha) Applies this force, optionally observing the specified alpha. Typically, the force is applied to the

d3.forceX([x]) Creates a new positioning force along the x-axis towards the given position

d3.forceLink([links]) Creates a new link force with the specified links and default parameters. If links is

collide.strength([strength]) If strength is specified, sets the force strength to the specified number in the

center.x([x]) If x is specified, sets the x-coordinate of the centering position to the specified

simulation.restart() Restarts the simulation’s internal timer and returns the simulation. In conjunction with

link.distance([distance]) If distance is specified, sets the distance accessor to the specified number or function

simulation.alphaMin([min]) If min is specified, sets the minimum alpha to the specified number in