function varargout = sptool(varargin) %#ok<STOUT> 
%SPTOOL has been deprecated
%
%   For signal and spectral analysis, use the Signal Analyzer app.
%   Open the app by typing signalAnalyzer in the MATLAB command window.
%
%   For filter design, use the Filter Designer app. Open the app by typing
%   filterDesigner in the MATLAB command window.
%
%   You can find both apps on the Apps tab, under Signal Processing and
%   Communications.
%
%   If you want to recover the data stored in an SPTOOL session file use 
%   s = load('filename.spt','-mat')
%
%   See also SIGNALANALYZER, FILTERDESIGNER

%   Copyright 1988-2021 The MathWorks, Inc.
error(message('signal:deprecated:deprecatedSPTOOL'));
end