plot(X,y);
X：数据矩阵，每一列为一个特征
y：数据结果向量
形状参数
linestyle
‘-’ solid lines (default).
‘–’ dashed lines.
‘:’ dotted lines.
‘-.’ dash-dotted lines.
markerstyle
‘+’ crosshair
‘o’ circle
‘*’ star
‘.’ point
‘x’ cross
‘s’ square
‘d’ diamond
‘^’ upward-facing triangle
‘v’ downward-facing triangle
‘>’ right-facing triangle
‘<’ left-facing triangle
‘p’ pentagram
‘h’ hexagram
color
‘k’ blacK
‘r’ Red
‘g’ Green
‘b’ Blue
‘m’ Magenta
‘c’ Cyan
‘w’ White
LineWidth：number
MarkerSize ：number
MarkerEdgeColor：number
MarkerFaceColor：number
其它
标题
title('...');
横轴、纵轴
xlabel('...');ylabel('...');
图例
legend('...'[,'...'])
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