dtw2m

Pure m-file implementation of DTW (dynamic time warping) with local paths of 0, 45, and 90 degrees

Contents

Syntax

Description

dtw2m(vec1, vec2, beginCorner, endCorner, plotOpt, distanceBound) returns the DTW distance between vec1 and vec2, assuming a local path constrains of 0, 45, and 90 degrees.

• vec1: testing vector
• vec2: reference vector
• beginCorner: 1 for anchored beginning
• endCorner: 1 for anchored ending
• plotOpt: 1 for plotting the DTW path
• distanceBound: distance bound for stop the computation. (Stop the computation immediately if the accumulated DTW distance is larger than this distance bound.)

[minDist, dtwPath, dtwTable] = dtw2m(...) also return two extra results:

• dtwPath: optimal path of DTW (Its size is 2xk, where k is the path length.)
• dtwTable: DTW table

Note that this function is a pure m-file implementation which is slow but easy to customize.

Example

vec1=[71 73 75 80 80 80 78 76 75 73 71 71 71 73 75 76 76 68 76 76 75 73 71 70 70 69 68 68 72 74 78 79 80 80 78];
vec2=[69 69 73 75 79 80 79 78 76 73 72 71 70 70 69 69 69 71 73 75 76 76 76 76 76 75 73 71 70 70 71 73 75 80 80 80 78];
[minDist, dtwPath, dtwTable] = dtw2m(vec1, vec2);
dtwPathPlot(vec1, vec2, dtwPath);

See Also

dtwPathPlot, dtwBridgePlot, dtw1, dtw2, dtw3.

Published with MATLAB® R2018a