hline.m

偏最小二乘算法在MATLAB中的实现

function hline(x,lt)
%HLINE Adds a horizontal line to current graph at specified location
%  I/O syntax is: hline(x) where x is the specified location
%  Note: HLINE will leave the plot in the original hold state.
z = axis;
i = ishold;
hold on
if nargin == 1
  plot([z(1) z(2)],[x x],'-g')
else
    plot([z(1) z(2)],[x x],lt)
end
if i == 0
  hold off
end