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# sigwin.rectwin class

Package: sigwin

Construct rectangular window object

## Description

sigwin.rectwin creates a handle to a rectangular window object for use in spectral analysis and FIR filtering by the window method. Object methods enable workspace import and ASCII file export of the window values.

The following equation defines the rectangular window of length N:

$w\left(n\right)=1\text{ }0\le n\le N-1$

## Construction

H = sigwin.rectwin returns a rectangular window object H of length 64.

H = sigwin.rectwin(Length) returns a rectangular window object H of length Length. Length requires a positive integer. Entering a positive noninteger value for Length rounds the length to the nearest integer. Entering a 1 for Length results in a window with a single value of 1.

## Properties

 Length Rectangular window length. The window length requires a positive integer. Entering a positive noninteger value for Length rounds the length to the nearest integer. Entering a 1 for Length results in a window with a single value of 1.

## Methods

 generate Generates rectangular window info Display information about rectangular window object winwrite Save rectangular window in ASCII file

## Copy Semantics

Handle. To learn how copy semantics affect your use of the class, see Copying Objects in the MATLAB® Programming Fundamentals documentation.

## Examples

Create default length N=64 rectangular window:

```H=sigwin.rectwin;
wvtool(H); ```

Generate length N=128 rectangular window, return values, and write ASCII file:

```H=sigwin.rectwin(128);
% Return window with generate
win=generate(H);
% Write ascii file in current directory
% with window values
winwrite(H,'rectwin_128')```

## References

Oppenheim, A.V., and Schafer, R.W. Discrete-time Signal Processing, Upper Saddle River, N.J: Prentice Hall, 1989, pp. 444–447.