Adding a datacursor on s parameter plot at a specific frequency with a specific label

Hi,

I have a question on how to add a datacursor on a s parameter plot at a specific frequency for both the curves in the plot. The value of the frequency is fixed e.g. 5 GHz

data = read(rfdata.data,''); data2 = read(rfdata.data,''); freq = data.Freq; freq2 = data.Freq; figure hold off; h = plot(data,'S12', 'db'); set(h, 'Color', [1 0 0]); hold on h = plot(data2,'S12', 'db') set(h, 'Color', [0 0 1]); hold on

Thanks for the help!