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# eqtflength() - Signal Processing

### Syntax

### Example

### Output / Return Value

### Limitations

### Alternatives / See Also

### Reference

[b,a] = eqtflength(num,den) modifies the vector num and/or the vector den, so that the resulting output vectors b and a have the same length. The input vectors num and den may have different lengths. The vector num represents the numerator polynomial of a given discrete-time transfer function, and the vector den represents its denominator. The resulting numerator b and denominator a represent the same discrete-time transfer function, but these vectors have the same length.[b,a,n,m] = eqtflength(num,den) modifies the vectors as above and also returns the numerator order n and the denominator m, not including any trailing zeros.Use eqtflength to obtain a numerator and denominator of equal length before applying transfer function conversion functions such as tf2ss and tf2zp to discrete-time models.

[b,a] = eqtflength(num,den)[b,a,n,m] = eqtflength(num,den)

num = [1 0.5]; den = [1 0.75 0.6 0]; [b,a,n,m] = eqtflength(num,den);