`blackman` — Generate a Blackman window as an N-by-1 real column vector.

blackman generates Blackman windows for signal-processing workflows where lower spectral leakage is desired. RunMat supports the common MATLAB symmetric and periodic forms, including optional single-precision output.

How `blackman` works in RunMat

blackman(L) returns an L x 1 symmetric Blackman window.
blackman(L, 'periodic') returns the periodic form used in spectral-analysis workflows.
blackman(..., 'single') returns a single-precision window; 'double' is the default.
If L is noninteger, RunMat rounds it to the nearest integer before constructing the window.
blackman(0) returns an empty 0 x 1 tensor.
blackman(1) returns 1.
For the symmetric case and L > 1, coefficients follow 0.42 - 0.5*cos(2*pi*n/(L-1)) + 0.08*cos(4*pi*n/(L-1)).
The periodic form is constructed by evaluating a symmetric window of length L + 1 and dropping the final sample.

Examples

Generate a short Blackman window

w = blackman(8);
disp(w')

Generate a periodic Blackman window

w = blackman(8, 'periodic');
disp(w')

Generate a single-precision Blackman window

w = blackman(8, 'single');
class(w)

FAQ

Why would I use `blackman` instead of `hann` or `hamming`?

A Blackman window is often used when you want lower spectral leakage at the cost of a wider main lobe. It is a common tradeoff choice in spectral analysis workflows.

What is the difference between the symmetric and periodic Blackman window?

Use the symmetric form for filter-design style workflows. Use 'periodic' for FFT-based spectral analysis, where RunMat constructs a symmetric window of length L + 1 and removes the final sample.

Does `blackman` support single precision?

Yes. Pass 'single' as the final option to request a single-precision output. The default output type is double precision.

These functions work well alongside blackman. Each page has runnable examples you can try in the browser.

hann, hamming, fft

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blackman — Generate a Blackman window as an N-by-1 real column vector.

How blackman works in RunMat