MATLAB: How to set the UIGETFILE filter in MATLAB 7.5 (R2007b)

filterspecMATLAB

I would like to return a filtered list of the files in a directory. When I use the following code in MATLAB 7.5 (R2007b), UIGETFILE does not ouput a filtered list of files.

Filter = '*2007*';
DefaultFileName = 'log.mat';
Title = 'Title';
uigetfile(Filter,Title,DefaultFileName);

But, this code produced a filtered list in MATLAB 7.3 (R2006b)

Best Answer

To set the filter specification in MATLAB 7.5 (R2007b), the filter term(s) must have a file extension. Any extension will be accepted for a filter, even the wildcard character . If no extension is provided, the UIGETFILE filter will reset back to the default '.*'. To achieve the desired results, use the following code:

Filter = '*2007*.*';
DefaultFileName = 'log.mat';
Title = 'Title';
uigetfile(Filter,Title,DefaultFileName);

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MATLAB: How to properly use the Cascaded integrator-comb (CIC) filter in the cascade filter structure to filter a signal in Filter Design Toolbox 3.0 (R14)

Currently, the CIC filters only work with the built-in signed integer data types such as INT8, INT16, and INT32.

The CIC filter must come first in the cascade. The following code shows how the code should be written:

L = 7;     % variable interpolation factor
N = 4;     % number of stages
hcic = mfilt.cicinterp(L,1,N);
dcGain = L*gain(hcic);
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x = randn(1,64);
y = filter(Hcas,int16(x));

Please note that the CIC filter (hcic) must come first in the cascade. The reason is that output of the CIC filter is an INT16 in this case and the hscalar filter can interpret that data type. In Filter Design Toolbox 3.0 (R14) the CIC filters do not work with the output that is an embedded.fi object. In this example, the output of the hscalar filter is an embedded.fi object.

MATLAB: Does saving the variables in a MAT file produce extremely large files in MATLAB 7.5 (R2007b)

This occurs because one of the new options in MATLAB 7.5 (R2007b) is saving a MAT-file based on the HDF5 data format. The HDF5 data format is richer and is not compressed in MATLAB R2007b. The resulting files are thus much larger. The size is particularly larger when the user is trying to save cells or structures.

This issue can be resolved by changing your default save option from File menu -> Preferences -> General -> MAT files to either "MATLAB Version 7 or later" or "MATLAB Version 5 or later".

With MATLAB R2008a, the SAVE command now compresses these MAT-files.

Best Answer

Related Solutions

MATLAB: How to properly use the Cascaded integrator-comb (CIC) filter in the cascade filter structure to filter a signal in Filter Design Toolbox 3.0 (R14)

MATLAB: Does saving the variables in a MAT file produce extremely large files in MATLAB 7.5 (R2007b)

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