readall

Read all signals from datastore

Since R2020a

Syntax

data = readall(sds)

Description

data = readall(sds) reads all signal data from the datastore sds.

Examples

Read and Analyze All Signals in Signal Datastore

Specify the path to four signals included with MATLAB®. The signals are recordings of a bird chirp, a gong, a train, and a splat. All signals are sampled at 8192 Hz.

folder = fullfile(matlabroot,'toolbox','matlab','audiovideo', ...
         ["chirp.mat","gong.mat","train.mat","splat.mat"]);
fs = 8192;
sds = signalDatastore(folder,'SampleRate',fs);

Read the data in the first variables of all the files in the datastore and plot the Fourier synchrosqueezed transform of each signal.

data = readall(sds);

tiledlayout('flow')
for i = 1:length(data)
    nexttile
    fsst(data{i},fs,'yaxis')
end

Input Arguments

sds — Signal datastore

signalDatastore object

Signal datastore, specified as a signalDatastore object.

Output Arguments

data — All signals in signal datastore

cell array

All signals in the signal datastore, returned as a cell array. Each cell of data contains signals from a file or a member. Use the ReadOutputOrientation property of the datastore to control the orientation of data as either a column array or a row array.

Tips

When reading file data, because this function reads all the data in the files at once, you may run out of memory if your dataset is large.

Version History

Introduced in R2020a