Digital filter design using pltSig.exe
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pltSig was originally written as a collection of signal processing applications
for users of the Matlab language.

However I found that there was a strong demand for one of the applications in
this collection (called erip, for equal ripple filter design) even among
non-Matlab users. This is because the alternatives available for digital filter
design are far less capable than erip and also are generally expensive.
In contrast, pltSig.exe (which includes erip) is free. Although erip is the
most popular applicaiton in the pltSig collection, it also includes quite a few
other signal processing applications as well as applications in other
mathematical and engineering topics that you may find useful and interesting.

Although you must have a Matlab license to run the pltSig toolbox, you don't
need a Matlab licence to run pltSig.exe. This is because I used a Matlab
compiler to convert the pltSig Matlab code to a Windows executable file that
can be run on any version of windows from WinXP up to Windows 11.

To run pltSig.exe follow these steps: ----------------------------------------

1. Create a new folder called pltSig anywhere in your file system.

2. Download pltSigEXE.zip from my website: www.mennen.org/plt/pltSigExe.zip
   (This zip file does not include any source code, however you can find the
   complete source code by searching for "pltSig" at the Matlab File Exchange)

3. Unzip the zip file to the new folder you just created. You will now see the
   files pltSig.exe and erip.exe in the new folder. You will also see the file
   plt.chm which includes all the help documentation.

4. Create a desktop icon for pltSig.exe by dragging the pltSig.exe file to your
   desktop with the right mouse button. Then select "Create shortcuts here".

5. Similarly, create a desktop icon for erip.exe by dragging the erip.exe file to
   your desktop. This last step is optional since you can also start erip from
   pltSig.exe by clicking on the yellow erip button.
