Matlab基本函数-feather函数
1、feather函数：绘制羽毛图（速度向量图）
2、用法说明：
（1）feather(x,y) 函数绘制由向量参量x与y构成的速度向量，沿水平轴方向，从均匀间隔点以箭头发射出来；
（2）feather(z) 函数绘制羽毛图。参量z是一个复数，则feather(z)相当于compass(real(z)，imag(z))；
（3）feather(...,LineSpec) 函数绘制羽毛图。参量LineSpec指定的线型、标记符号、颜色等属性画出羽毛图；
（4）H = feather(...) 函数返回羽毛图中线型对象的句柄H。
3、举例说明
（1）feather(x,y)
a、源码
>> x = rand(50,1)
x =
0.8147
0.9058
0.1270
0.9134
0.6324
0.0975
0.2785
0.5469
0.9575
0.9649
0.1576
0.9706
0.9572
0.4854
0.8003
0.1419
0.4218
0.9157
0.7922
0.9595
0.6557
0.0357
0.8491
0.9340
0.6787
0.7577
0.7431
0.3922
0.6555
0.1712
0.7060
0.0318
0.2769
0.0462
0.0971
0.8235
0.6948
0.3171
0.9502
0.0344
0.4387
0.3816
0.7655
0.7952
0.1869
0.4898
0.4456
0.6463
0.7094
0.7547
>> y = rand(50,1)
y =
0.2760
0.6797
0.6551
0.1626
0.1190
0.4984
0.9597
0.3404
0.5853
0.2238
0.7513
0.2551
0.5060
0.6991
0.8909
0.9593
0.5472
0.1386
0.1493
0.2575
0.8407
0.2543
0.8143
0.2435
0.9293
0.3500
0.1966
0.2511
0.6160
0.4733
0.3517
0.8308
0.5853
0.5497
0.9172
0.2858
0.7572
0.7537
0.3804
0.5678
0.0759
0.0540
0.5308
0.7792
0.9340
0.1299
0.5688
0.4694
0.0119
0.3371
>> feather(x,y)
b、结果
（2）feather(z)
a、源码
>> z = 1 + 2i z = 1.0000 + 2.0000i >> feather(z)b、结果
（3）feather(...,LineSpec)
a、源码
feather(x,y,':')b、结果
（4）H = feather(...)
a、源码
>> H = feather(x,y,':') H = 174.0054 175.0015 176.0013 177.0013 178.0013 179.0013 180.0013 181.0013 182.0013 183.0013 184.0013 185.0013 186.0013 187.0013 188.0013 189.0013 190.0013 191.0013 192.0013 193.0013 194.0013 195.0013 196.0013 197.0013 198.0013 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
4、附录
>> help feather
feather Feather plot.
feather(U,V) plots the velocity vectors with components U and V as
arrows emanating from equally spaced points along a horizontal axis.
feather is useful for displaying direction and magnitude data that
is collected along a path.
feather(Z) for complex Z is the same as feather(REAL(Z),IMAG(Z)).
feather(...,'LineSpec') uses the color and linestyle specification
from 'LineSpec' (see PLOT for possibilities).
feather(AX,...) plots into AX instead of GCA.
H = feather(...) returns a vector of line handles.
Example:
theta = (-90:10:90)*pi/180; r = 2*ones(size(theta));
[u,v] = pol2cart(theta,r);
feather(u,v), axis equal
See also compass, rose, quiver.
Overloaded methods:
gpuArray/feather
Reference page in Help browser
doc feather