Problem 42795. Fast 1-D Convolution (valid shape)

Peng Liu

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Pursuant to the first problem in the fast 1-D convolution series, this problem asks for the fast algorithm to compute the 1-D convolution in its "valid" output shape.

There exists a fast 1-D convolution algorithm way more efficient than MATLAB's built-in conv function invoked in the form conv(u,v,'valid'), and the performance improvement is more pronounced when length(u) and/or length(v) are large. Do you know how? Try it out.

Previous problem: Fast 1-D Convolution (same shape).

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38 Solutions

Last Solution submitted on Dec 21, 2025

Last 200 Solutions

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1 Comment

li haitao on 16 Nov 2018

"score.p" is invalid now, the score is size, not speed.

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