Hi,
unfortunately there is no plot function that supports this. However, you can easily obtain this result by adding throughput of two base stations as
mean(sum(simulation_results.cell_specific(1).throughput_coded,3),1) + mean(sum(simulation_results.cell_specific(2).throughput_coded,3),1)
and plotting this over the SNR vector (SNR_vec).
greetings
Stefan