You are here : matlab → Signal Processing → seqperiod
# seqperiod() - Signal Processing

### Syntax

### Example

### Output / Return Value

### Limitations

### Alternatives / See Also

### Reference

p = seqperiod(x) returns the integer p that corresponds to the period of the sequence in a vector x. The period p is computed as the minimum length of a subsequence x(1:p) of x that repeats itself continuously every p samples in x. The length of x does not have to be a multiple of p, so that an incomplete repetition is permitted at the end of x. If the sequence x is not periodic, then p = length(x).If x is a matrix, then seqperiod checks for periodicity along each column of x. The resulting output p is a row vector with the same number of columns as x.If x is a multidimensional array, then seqperiod checks for periodicity along the first nonsingleton dimension of x. In this case:p is a multidimensional array of integers with a leading singleton dimension.The lengths of the remaining dimensions of p correspond to those of the dimensions of x after the first nonsingleton one.[p,num] = seqperiod(x) also returns the number num of repetitions of x(1:p) in x. num might not be an integer.

p = seqperiod(x)[p,num] = seqperiod(x)

Multichannel Signal PeriodsOpen This Example Generate a multichannel signal and determine the period of each column. x = [4 0 1 6; 2 0 2 7; 4 0 1 5; 2 0 5 6]; p = seqperiod(x) p = 2 1 4 3 The first column of x has period 2. The second column of x has period 1. The third column of x is not periodic, so p(3) is just the number of rows of x. The fourth column of x has period 3, although the second repetition of the periodic sequence is incomplete.