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- Previously the erip was limited to linear phase FIR filter designs if the DSP
System Toolbox was not installed. (erip uses functions in that toolbox when designing IIR filters or nonlinear
phase FIR filters.) However, as of this version, erip can call an alternative c-based compiled Windows
application allowing it to design IIR and nonlinear phase FIR filters without the DSP System Toolbox.
This application (called iir.exe) is supplied as a base64 encoded text file
since binary files are not allowed in the file exchange. For Windows systems, when erip is started for the
first time the text file is automatically decoded to create the executable. Currently the
iir.exe application is only available for Windows, so if you are using a
Unix-based OS, you will still need the DSP System Toolbox for designing IIR filters. (Note: This doesn't
diminish the value of The DSP System Toolbox since it contains many other useful tools and functions.
Also, note that the DSP System Toolbox was introduced in R2011a. Before that, the functions used by
erip for IIR filter design were in the Filter Design Toolbox.)
- In the erip.m application, left clicking on the fvtool button opens Matlab's
fvtool utility allowing you to display items that are not shown in the other erip figures
(step & impulse response, unwrapped phase, phase delay, and group delay). As of this release, you
can now also right click on this button which displays those items using the easier-to-use plt plotting function.
This is also useful since you may not have the fvtool program in your Matlab installation since it is part of the
DSP System Toolbox. (In the case where you don't have fvtool available, left clicking the fvtool button has the same
effect as the right click.)
- Added the utility function b64decode.m which decodes text files encoded
using the standard base64 format. See details in the
Auxiliary functions section.
This function is used automatically by erip as mentioned above and also may
be used to create MPP.exe from the included base64 encoded text file if you
are interested in using the included
Matlab Preprocessor.
- Added the utility function matplt.m which allows you to easily plot the variables
contained in a .mat file. (Similar to the workspace plotter).
See details in the Auxiliary functions section.
- Added a new pltSig.exe section to the help file.
pltSig.exe is a compiled version of demoplt.m
that allows non-Matlab users to run all the applications included in the pltSig toolbox.
The pltSig.exe Windows application is not included in the pltSig toobox, but is available on
my website here:
pltSigEXE.zip
(21 Mbytes).
To run it, simply unzip the archive to a folder of your choosing and double click on pltSig.exe
- Added four string arguments (reset,full,width,height) to the figpos.m utility
function. Read about the use of these new arguments in the
Auxiliary functions section.
- Improved and dramtically simplified the utility function screencfg.m
used by figpos.m to aid in figure window positioning.
The screencfg helper function taskbarSZ.m is no longer needed and has
been deleted. See details of the screencfg.m function in the
Auxiliary functions section.
- Enhanced the image pseudo object by adding an option for direct scaling and also by providing the ability
to add custom colormaps.
- The pltmap.m demo program used to create the image using cubic interpolation. That
is still the default on startup, but now you may also select nearest neighbor interpolation or the image can
be created using 2D convolution with a selectable kernel size and shape.
- Added a load button in the gpsLog.m application so you can load a new log file
after the application has started.
- Fixed a bug in erip.m and editz.m that caused the
phase to be calculated improperly.
- afilt.m was calculating the correct elliptical filter for even order filters
but incorrectly for odd order filters. This bug has been fixed. Also the Save tag was added to the menu
box to make it easier to save the results to a .mat file as well as a .txt file if desired. The documentation
was improved to show how the results in the .mat file can be used.
- Fixed a recently introduced bug in plt('close')
- Since the plt.m function has been growing larger, to improve readability, it
has been split into two parts (plt.m and cur.m).
- Fixed additional bugs related to Windows 11.
- Other minor bug fixes.
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