MATLAB: Do QUERYBUILDER, SPTOOL, and CFTOOL fail to open in MATLAB 7.0 (R14)

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In MATLAB 7.0 (R14), I cannot use the QUERYBUILDER, SPTOOL, and CFTOOL functions. When I call them from the command line, they fail to appear, but do not give any errors.

Best Answer

This has been verified as a bug in MATLAB 7.0 (R14). As a workaround, please make sure that the MATLAB Web Server is not running, and then try to launch the tools.

Related Solutions

MATLAB: Undefined function or variable ‘querybuilder’.

The querybuilder function is part of the Database Toolbox. You can find more information http://www.mathworks.com/products/database/.

MATLAB: Application of the Sptool filter

Your generated mfile suppose to look like this

%UNTITLED Returns a discrete-time filter object.
% M-File generated by MATLAB(R) 7.8 and the Signal Processing Toolbox 6.11.
%

% Generated on: 11-Feb-2011 13:01:59
%
% Butterworth Lowpass filter designed using FDESIGN.LOWPASS.
% All frequency values are in Hz.
Fs = 48000;  % Sampling Frequency

Fpass = 9600;        % Passband Frequency

Fstop = 12000;       % Stopband Frequency

Apass = 1;           % Passband Ripple (dB)

Astop = 80;          % Stopband Attenuation (dB)

match = 'stopband';  % Band to match exactly

% Construct an FDESIGN object and call its BUTTER method.
h  = fdesign.lowpass(Fpass, Fstop, Apass, Astop, Fs);
Hd = design(h, 'butter', 'MatchExactly', match);
% [EOF]

Now you should copy those lines into your script:

Fs = 48000;  % Sampling Frequency
Fpass = 9600;        % Passband Frequency
Fstop = 12000;       % Stopband Frequency
Apass = 1;           % Passband Ripple (dB)
Astop = 80;          % Stopband Attenuation (dB)
match = 'stopband';  % Band to match exactly
h  = fdesign.lowpass(Fpass, Fstop, Apass, Astop, Fs);
Hd = design(h, 'butter', 'MatchExactly', match);

Dont be afraid of objects. Filtering is simple now, you can use Hd filter object whenever you need to filter any signal:

Sfiltered=filter( Hd, S);

Best Answer

Related Solutions

MATLAB: Undefined function or variable ‘querybuilder’.

MATLAB: Application of the Sptool filter

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