Hi @JohannesENS
please find attached and run the script in the table.
one way of doing this is by introducing a new column with the formula :"min diameter / mm"n + :range
![ron_horne_0-1636542072151.png ron_horne_0-1636542072151.png](https://community.jmp.com/t5/image/serverpage/image-id/37452iC48C2A8AD0DEC7B1/image-size/medium?v=v2&px=400)
now you set the min diameter and the max diameter together on the Y axis. then you choose bars and select the range option
![ron_horne_1-1636542202064.png ron_horne_1-1636542202064.png](https://community.jmp.com/t5/image/serverpage/image-id/37453i2D3A071E8A12AC6D/image-size/medium?v=v2&px=400)
let us know if it worked,
ron