matlab这句语句“Neve = NameObj(1).Event_num; % 事件数量 ” 中NameObj(1).有什么意义

Question

ArrayType = NameObj(1).Arraytype;   % ArrayType 阵列类型
Ne = NameObj(1).Ele_num;   %% 阵元数量number of channel elements
pitch = NameObj(1).Pitch; % pitch (m)
Rconvex = NameObj(1).Rconvex; % 扇形凸阵的曲率半径
Neve = NameObj(1).Event_num; % 事件数量number of events
Nf = NameObj(1).Frames; % 保存的画面数目number of frames to be saved
c =  NameObj(1).soundv;               %声速 sound velocity (in m/s)
fs =  NameObj(1).fs*10^(6);                  % 采样频率sampling frequency (MHz) --> Hz

这些语句中的“NameObj(1).---”有什么用？