Thanks for your reply sir.I did it.I plotted iD and gm vs vgs .Then for X AXIS, using Y vs Y option ,I chose iD. Now I can plot gm vs ID .
Now I am stuck with another problem.My technology library is UMC180.When I use UMC_N_18_MM (MEDIUM MODE Transistor), I obtain all the Dc parameters like gm,vgs,vth etc in Results browser.But for UMC_N_L_18_W_500_RF transistor, which is the one I require for RF design,after the dc analysis result browser window dc info doesn't list gm,vgs,vth etc.Since I can obtain drain current from schematic,I am plotting Id vs Vgs and taking derivative to obtain gm.Then to obtain gm by id ,I change x axis as done previously.I would like to know whetehr there is any means to list out these dc parameters in results browser window,whereas if I do prit dc operating point of RF transistor,I can see all these.But they are not available in dc Result browser,to use them in calculator or graphs.To obtain graphs with vgs-vth as x axis i need these dc parameters in dcinfo.They are obtained for MM transistor ,but not for RF transistor.