这个命令中边界段的矩阵每行到底表示什么啊?请高手指点。多谢!
% D=SQUAREG(BS) gives a matrix with one column for each boundary segment
% specified in BS.
% Row 1 contains the start parameter value.
% Row 2 contains the end parameter value.
% Row 3 contains the number of the left hand region.
% Row 4 contains the number of the right hand region.