gain vs frequency 2d plot in hfss

hello! sir.. i m trying to plot 2d plot of gain vs frequency..but by selecting only a single frequency it is giving nothing..bt if i take all the frequencies it is nt clear.. plz clear my doubt by giving ur valuable time..i deadly need ur help..

I'L take u have done a frequency sweep simulation for ur structure..!! Since u said Gain, I'L take it is an antenna u r trying to simulate ..!! Have u defined an Infinite sphere before u plot ?? If not do it, den u need to fix theta and select all Phi, or fix a phi and select all theta according to the requirement of ur plot and it will give u the plot u r looking for..!!