dtw

DTW (dynamic time warping)

Contents

Syntax

Description

dtw(vec1, vec2) returns the DTW distance between two vectors vec1 and vec2.

dtw(vec1, vec2, dtwOpt) perform DTW by using the given parameters in dtwOpt, with the fields

• dtwOpt.type: type of DTW
  • dtwOpt.type=1 for type-1 DTW of local path constraints of 27-45-65.
  • dtwOpt.type=2 for type-2 DTW of local path constraints of 0-45-90.
  • dtwOpt.type=3 for type-3 DTW of local path constraints of 0-45.
• dtwOpt.beginCorner: 1 for anchored beginning
• dtwOpt.endCorner: 1 for anchored ending

dtw(vec1, vec2, dtwOpt, showPlot) plots the DTW path

[minDist, dtwPath, dtwTable] = dtw(...) returns additions information:

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

Depending on the value of dtwOpt.type, this function calls dtw1, dtw2, or dtw3.

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]=dtw(vec1, vec2);
dtwPathPlot(vec1, vec2, dtwPath);

See Also

dtwPathPlot, dtwBridgePlot, dtw1, dtw2, dtw3.

Published with MATLAB® R2018a