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1、length函数：计算向量或矩阵的长度
2、用法说明
y = length(x) 函数计算指定向量或矩阵的长度y。如果参数变量x是向量，则返回其长度；如果参数变量是非空矩阵，则length(x)与max(size(x))等价
3、举例说明
>> x = 'youhaidong'
x =
youhaidong
>> y = length(x)
y =
10
>> x = rand(6,6)
x =
0.8147 0.2785 0.9572 0.7922 0.6787 0.7060
0.9058 0.5469 0.4854 0.9595 0.7577 0.0318
0.1270 0.9575 0.8003 0.6557 0.7431 0.2769
0.9134 0.9649 0.1419 0.0357 0.3922 0.0462
0.6324 0.1576 0.4218 0.8491 0.6555 0.0971
0.0975 0.9706 0.9157 0.9340 0.1712 0.8235
>> y = length(x)
y =
64、附录
>> help length
length Length of vector.
length(X) returns the length of vector X. It is equivalent
to MAX(SIZE(X)) for non-empty arrays and 0 for empty ones.
See also numel.
Overloaded methods:
timer/length
serial/length
daqdevice/length
daqchild/length
distributed/length
codistributed/length
Composite/length
gpuArray/length
fints/length
videosource/length
videoinput/length
visa/length
udp/length
tcpip/length
icgroup/length
icdevice/length
i2c/length
gpib/length
Bluetooth/length
xregpointer/length
mbcstore/length
guidarray/length
cgrules/length
designdev/length
des_constraints/length
coninputfactor/length
xregcontainer/length
xregmulti/length
xregcovariance/length
xregmonitorplotproperties/length
xregdataset/length
cgtradeoffkeytable/length
dataset/length
categorical/length
tscollection/length
Reference page in Help browser
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