What will be the expression for RON then?

But RON is defined for linear region right?

The equations are opposite right?

If I want to plot RON vs Vds is nmos in ltspice... Should I do d(Vds)/d(Id) or VDS/ID?... Please help as whether RON is a large signal parameter or small signal?

Tell me how?

I want the gm to be at y-axis & W/L in x-axis... Is this possible in ltspice?

But, I want the characterization to be done in ltspice

How can I characterize gm vs W/L in ltspice. Can anyone provide the testbench explaining the proper steps?