一、颜色
1. ‘b’ blue
2. 'g' green
3. 'r' red
4. 'c' cyan
5. 'm' magenta
6. 'y' yellow
7. 'k' black
8. 'w' white
二、线型
1. '-' solid line style
2. ‘--’ dashed line style
3. '-.' dash-dot line style
4. ':' dotted line style
三、数据点形状
1. '.' point marker
2. 'o' circle marker
3. 'v' triangle_down marker
4. '^' triangle_down marker
5. '>' triangle_left marker
6. '>' triangle_right marker
7. '1' tri_down marker
8. '2' tri_up marker
9. '3' tri_left marker
10. '4' tri_right marker
11. '|' vline marker
12. 's' square marker
13. 'p' pentagon marker
14. '*' star marker
15. 'h' hexagon1 marker
16. 'H' hexagon2 marker
17. '+' plus marker
18. 'x' x marker
19. 'D' diamond marker
20. 'd' thin_diamond marker
21. '_' haline marker
