Matlab基本函数-compass函数

1、compass函数：罗盘图

2、用法说明：

（1）compass(x,y)函数绘制一个由原点出发由(x,y)组成的向量箭头图形；

（2）compass(z)等价于compass（real(z),imag(z))；

（3）compass(...,LineSpec)函数用参量LineSpec指定箭头的线型、标记符号、颜色等属性；

（4）h = compass(...)函数返回line对象的句柄给h。

3、实例

3.1、compass(x,y)

（1）源码

>> x=1:100

x =

  Columns 1 through 17

     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16    17

  Columns 18 through 34

    18    19    20    21    22    23    24    25    26    27    28    29    30    31    32    33    34

  Columns 35 through 51

    35    36    37    38    39    40    41    42    43    44    45    46    47    48    49    50    51

  Columns 52 through 68

    52    53    54    55    56    57    58    59    60    61    62    63    64    65    66    67    68

  Columns 69 through 85

    69    70    71    72    73    74    75    76    77    78    79    80    81    82    83    84    85

  Columns 86 through 100

    86    87    88    89    90    91    92    93    94    95    96    97    98    99   100

>> y=rand(1,100)

y =

  Columns 1 through 10

    0.8147    0.9058    0.1270    0.9134    0.6324    0.0975    0.2785    0.5469    0.9575    0.9649

  Columns 11 through 20

    0.1576    0.9706    0.9572    0.4854    0.8003    0.1419    0.4218    0.9157    0.7922    0.9595

  Columns 21 through 30

    0.6557    0.0357    0.8491    0.9340    0.6787    0.7577    0.7431    0.3922    0.6555    0.1712

  Columns 31 through 40

    0.7060    0.0318    0.2769    0.0462    0.0971    0.8235    0.6948    0.3171    0.9502    0.0344

  Columns 41 through 50

    0.4387    0.3816    0.7655    0.7952    0.1869    0.4898    0.4456    0.6463    0.7094    0.7547

  Columns 51 through 60

    0.2760    0.6797    0.6551    0.1626    0.1190    0.4984    0.9597    0.3404    0.5853    0.2238

  Columns 61 through 70

    0.7513    0.2551    0.5060    0.6991    0.8909    0.9593    0.5472    0.1386    0.1493    0.2575

  Columns 71 through 80

    0.8407    0.2543    0.8143    0.2435    0.9293    0.3500    0.1966    0.2511    0.6160    0.4733

  Columns 81 through 90

    0.3517    0.8308    0.5853    0.5497    0.9172    0.2858    0.7572    0.7537    0.3804    0.5678

  Columns 91 through 100

    0.0759    0.0540    0.5308    0.7792    0.9340    0.1299    0.5688    0.4694    0.0119    0.3371

>> compass(x,y)

（2）运行结果

3.2、compass(z)

（1）源码

>> z=[1+2i 2+4i 5-6i]

z =

   1.0000 + 2.0000i   2.0000 + 4.0000i   5.0000 - 6.0000i

>> compass(z)

（2）结果

3.3、compass(...,LineSpec)

（1）源码

 compass(x,y,'--m')

（2）结果

3.4、h = compass(...)

（1）源码

>> h=compass(x,y,'--m')

h =

  199.0013
  200.0013
  201.0013
  202.0013
  203.0013
  204.0013
  205.0013
  206.0013
  207.0013
  208.0013
  209.0013
  210.0013
  211.0013
  212.0013
  213.0013
  214.0013
  215.0013
  216.0013
  217.0013
  218.0013
  219.0013
  220.0013
  221.0013
  222.0013
  223.0013
  224.0013
  225.0013
  226.0013
  227.0013
  228.0013
  229.0013
  230.0013
  231.0013
  232.0013
  233.0013
  234.0013
  235.0013
  236.0013
  237.0013
  238.0013
  239.0013
  240.0013
  241.0013
  242.0013
  243.0013
  244.0013
  245.0013
  246.0013
  247.0013
  248.0013
  249.0013
  250.0013
  251.0013
  252.0013
  253.0013
  254.0013
  255.0013
  256.0013
  257.0013
  258.0013
  259.0013
  260.0013
  261.0013
  262.0013
  263.0013
  264.0013
  265.0013
  266.0013
  267.0013
  268.0013
  269.0013
  270.0013
  271.0013
  272.0013
  273.0013
  274.0013
  275.0013
  276.0013
  277.0013
  278.0013
  279.0013
  280.0013
  281.0013
  282.0013
  283.0013
  284.0013
  285.0013
  286.0013
  287.0013
  288.0013
  289.0013
  290.0013
  291.0013
  292.0013
  293.0013
  294.0013
  295.0013
  296.0013
  297.0013
  298.0013