matlab 画图
线形

• Solid line (default)
  -- Dashed line
  : Dotted line
  -. Dash-dot line

颜色
r Red
g Green
b Blue
c Cyan
m Magenta
y Yellow
k Black
w White

数据点的形状

• Plus sign
  o Circle

• Asterisk
  . Point
  x Cross
  'square' or s Square
  'diamond' or d Diamond
  ^ Upward-pointing triangle
  v Downward-pointing triangle

Right-pointing triangle
'pentagram' or p Five-pointed star (pentagram)
'hexagram' or h Six-pointed star (hexagram)

Examples

Plot the sine function over three different ranges using different line styles, colors, and markers.
t = 0:pi/20:2pi;
plot(t,sin(t),'-.r')
hold on
plot(t,sin(t-pi/2),'--mo')
plot(t,sin(t-pi),':bs')
hold off