function [ position ] = mfSSVEP_ring_plot( freq )
freq = round(freq*10)/10;
if(freq == 8)
    position = 16;
elseif(freq == 8.2)
    position = 22;
elseif(freq == 8.4)
    position = 21;
elseif(freq == 8.6)
    position = 15;
elseif(freq == 8.8)
    position = 10.5;
elseif(freq == 9)
    position = 17;
elseif(freq == 9.2)
    position = 23;
elseif(freq == 9.4)
    position = 28.5;
elseif(freq == 9.6)
    position = 26.5;
elseif(freq == 9.8)
    position = 20;
elseif(freq == 10)
    position = 14;
elseif(freq == 10.2)
    position = 8.5;
elseif(freq == 10.4)
    position = 5;
elseif(freq == 10.6)
    position = 11.5;
elseif(freq == 10.8)
    position = 29.5;
elseif(freq == 11)
    position = 35;
elseif(freq == 11.2)
    position = 32;
elseif(freq == 11.4)
    position = 25.5;
elseif(freq == 11.6)
    position = 7.5;
elseif(freq == 11.8)
    position = 2;
else
    fprintf('input:%d,output unkonwn',freq);
end
end

