helperModClassPlotSpectrogram.m

function helperModClassPlotSpectrogram(dataDirectory,modulationTypes,fs,sps)
%helperModClassPlotSpectrogram Spectrogram of frames
% helperModClassPlotSpectrogram(DIR,MODTYPES,FS,SPS) plots a spectrogram
% for each modulation type specified in MODTYPES using datafiles in the
% DIR folder. FS is the sample rate. SPS is the samples per symbol.
% 
% See also ModulationClassificationWithDeepLearningExample.

% Copyright 2019 The MathWorks, Inc.

numRows = ceil(length(modulationTypes) / 4);
for modType=1:length(modulationTypes)
 subplot(numRows, 4, modType);
 files = dir(fullfile(dataDirectory,"*" + string(modulationTypes(modType)) + "*"));
 idx = 10;
 load(fullfile(files(idx).folder, files(idx).name), 'frame');

 spectrogram(frame,kaiser(sps),0,1024,fs,'centered');
 title(string(modulationTypes(modType)));
end
h = gcf; delete(findall(h.Children, 'Type', 'ColorBar'))
end