getLabeledSignal
Get labeled signals from labeled signal set
Description
Examples
Get Labeled Signal
Load a labeled signal set containing recordings of whale songs.
load whales
lsslss =
labeledSignalSet with properties:
Source: {2x1 cell}
NumMembers: 2
TimeInformation: "sampleRate"
SampleRate: 4000
Labels: [2x3 table]
Description: "Characterize wave song regions"
Use labelDefinitionsHierarchy to see a list of labels and sublabels.
Use setLabelValue to add data to the set.
Get a table with all the signals in lss.
t = getLabeledSignal(lss)
t=2×4 table
Signal WhaleType MoanRegions TrillRegions
________________ _________ ___________ ____________
Member{1} {79572x1 double} blue {3x2 table} {1x3 table}
Member{2} {76579x1 double} blue {3x2 table} {1x3 table}
Identify the sublabels of the trill regions.
d = getLabelNames(lss,'TrillRegions')d = "TrillPeaks"
Get the labeled signal corresponding to the second member of the set.
[lbs,info] = getLabeledSignal(lss,2)
lbs=1×4 table
Signal WhaleType MoanRegions TrillRegions
________________ _________ ___________ ____________
Member{2} {76579x1 double} blue {3x2 table} {1x3 table}
info = struct with fields:
TimeInformation: "sampleRate"
SampleRate: 4000
Extract the signal. Determine its sample rate and use the sample rate to compute the time vector.
fs = info.SampleRate; sg = getSignal(lss,2); t = (0:length(sg)-1)/fs;
Identify the moan and trill regions of interest and the peaks of the trill region.
mvals = getLabelValues(lss,2,'MoanRegions'); tvals = getLabelValues(lss,2,'TrillRegions'); peaks = getLabelValues(lss,2,{'TrillRegions','TrillPeaks'});
Plot the signal. Highlight the regions of interest and the peaks.
plot(t,sg) hold on [X,Y] = meshgrid([mvals.ROILimits;tvals.ROILimits],ylim); plot(X,Y,':k') topts = {'HorizontalAlignment','center','FontWeight','bold', ... 'FontSize',12,'Color',[139 69 19]/255}; text((X(1,1:4)+X(1,5:end))/2,Y(2,5:end)-0.1, ... ["moan" "moan" "moan" "trill"],topts{:}) hold off
