DSP Blockset

Detrend

Remove a linear trend from a vector.

Library

Statistics

Description

The Detrend block removes a linear trend from the length-M input vector, u, by subtracting the straight line that best fits the data in the least-squares sense.

The least-squares line, û = ax + b, is the line with parameters a and b that minimizes the quantity

for M evenly-spaced values of x, where u_i is the ith element in the input vector. The output, y = u-û, is an M-by-1 column vector (regardless of the input vector dimension) with the same frame status as the input.

Dialog Box

Supported Data Types

• Double-precision floating point
• Single-precision floating point

To learn how to convert to the above data types in MATLAB and Simulink, see Supported Data Types and How to Convert to Them.

See Also

Cumulative Sum	DSP Blockset
Difference	DSP Blockset
Least Squares Polynomial Fit	DSP Blockset
Unwrap	DSP Blockset
detrend	MATLAB

Also see Statistics for a list of all the blocks in the Statistics library.

Delay Line

Difference