tfdata

Access transfer function model data.

Syntax

• [numerator, denominator] = tfdata(sys)
• [numerator, denominator, Ts] = tfdata(sys)
• sys = tf(numerator, denominator)
• sys = tf(numerator, denominator, Ts)

Input argument

• sys - a LTI model.

Output argument

• numerator - polynomial coefficients: a row vector or as a cell array of row vectors.
• denominator - polynomial coefficients: a row vector or as a cell array of row vectors.
• Ts - Sampling time Ts, default: in seconds

Description

The function tfdata(sys) retrieves the matrix data numerator, denominator from the transfer function model (LTI array) represented by sys.

If sys is initially in the form of a state-space model (LTI array), it is automatically converted to the transfer function representation before extracting the matrix data.

Example

numerator = 10;
denominator = [20, 33, 44];
sys = tf(numerator, denominator)
[num, den] = tfdata(sys)

See also

tf.

History

Author

Allan CORNET