LCSS算法的matlab代码并举个例子
时间: 2023-09-14 17:10:09 浏览: 155
以下是LCSS算法的MATLAB代码,同时附上一个简单的例子:
```matlab
function [L,lcss] = LCSS(x,y,epsilon,delta)
% LCSS algorithm
% x: the first sequence, a row vector
% y: the second sequence, a row vector
% epsilon: the threshold to match elements, a scalar
% delta: the threshold to match subsequences, a scalar
% calculate the length of the two sequences
m = length(x);
n = length(y);
% initialize the LCSS matrix
L = zeros(m+1,n+1);
% calculate the LCSS matrix
for i = 1:m
for j = 1:n
if abs(x(i)-y(j))<=epsilon
L(i+1,j+1) = L(i,j)+1;
else
L(i+1,j+1) = max([L(i+1,j),L(i,j+1),L(i,j)]);
end
end
end
% calculate the LCSS length
lcss = L(m+1,n+1);
% check if the LCSS is greater than or equal to the threshold delta
if lcss>=delta
disp('The two sequences are LCSS-matched.')
else
disp('The two sequences are not LCSS-matched.')
end
```
接下来,我们使用一个简单的例子来说明如何使用LCSS算法。
假设我们有两个序列:x = [1 2 3 4] 和 y = [1 2 5 6]。
我们将epsilon设置为1,delta设置为2。然后,我们运行LCSS算法并得到结果:
```matlab
>> [L,lcss] = LCSS([1 2 3 4],[1 2 5 6],1,2);
The two sequences are LCSS-matched.
```
我们可以看到,由于两个序列有两个相同的元素(1和2),它们被认为是LCSS匹配的。由于匹配长度为2,大于或等于阈值delta=2,因此算法输出"The two sequences are LCSS-matched."。
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