David Koenig
Corning Inc. (Retired)
retired control engineer.
Matlab author.
Jazz and classical music fan. Piano aficionado. Bridge enthusiast.
Professional Interests: simulation and analysis of sounds
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Awarded to David Koenig on 17 Apr 2021
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Awarded to David Koenig on 15 Aug 2018
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Content Feed
Question
Does it help to have more than 16 gb of memory?
I am buying a computer and I wonder if it makes sense to purchase extra memory. I do a lot of number crunchng on sound waves sam...
2 months ago | 1 answer | 0
1
answerQuestion
How to use audio toolbox
Hello. I have audio toolbox and I am trying to cause my Yamaha P120 digital piano to produce the sound of a key strike by sendin...
2 years ago | 1 answer | 0
1
answerQuestion
How to extract information from sys
I would like to extract the coefficients in a discrete transfer function that I construct from a continuous transfer function. F...
2 years ago | 1 answer | 0
1
answerQuestion
How can I prevent the studdering initial sound when sound or soundsc is used?
When I feed a sine wave into sound or soundsc I get a ta-daaa at the beginning and the tone comes through as expected. It is int...
3 years ago | 0 answers | 0
0
answersQuestion
How to use webread to download numerical data
Hello. I have data in the form of .mat files in a folder in my Boxnet account. I would like to use a Matlab script to read those...
3 years ago | 1 answer | 0
1
answerHow can I protect a public script from being changed?
Thanks to Adam and OCDER.
3 years ago | 0
Question
How can I protect a public script from being changed?
I write scripts that I would like other Matlab users to run but I do not want them to be able to modify it. Is there a way to pr...
3 years ago | 2 answers | 0
2
answersQuestion
How to keep Matlab going on a long calculation?
I run simulations, some of which take on the order of 90 minutes. If I get one started and walk away to do other things, I find ...
5 years ago | 1 answer | 0
1
answerQuestion
How can I get the Mastering Matlab Toolbox
In "Mastering Matlab" by Hanselman & Littlefield there is a reference to the Mastering Matlab Toolbox that contains several scri...
6 years ago | 1 answer | 1
1
answerQuestion
Why doesn't mp3write work in R2015b but it does in R2013b?
When I try to use mp3write in R2015b I get Error using wavwrite (line 8) WAVWRITE will be removed in a future release. Use ...
6 years ago | 1 answer | 0
1
answerQuestion
How to change the Date and Time of a Saved Script?
On older versions, when I saved a script it kept the most recent time and date. This allowed me to easily use Windows Explorer t...
6 years ago | 0 answers | 0
0
answersQuestion
How long does it take to transfer a mat file to the cloud?
To use Matlab mobile I have uploaded a couple of scripts to the Matlab cloud and have been able to run them successfully. There ...
6 years ago | 0 answers | 0
0
answersQuestion
Can I add toolboxes to Matlab Home Later On?
Q1: I am a Matlab author and have used Matlab extensively in my two books. Now that I am aware of Matlab Home I want to know if ...
7 years ago | 1 answer | 0
1
answerQuestion
How can I get rid of the yellow background?
While editing a script I inadvertently clicked something that caused a yellow background for the script and also added comments ...
7 years ago | 4 answers | 3
4
answersQuestion
Do I need R2014B for this?
I need to find out which toolboxes my scripts need so that I can know whether Matlab Home will work. Does [fList, pList] = ma...
7 years ago | 0 answers | 0
0
answersQuestion
Can I Activate audiorecorder or recordblocking by Sound Level?
I am trying to use audiorecorder and recordblocking for tuning a piano and I would like to start collecting when I strike a key....
7 years ago | 0 answers | 0
0
answersQuestion
How to calculate modal density?
Can you point me to a script that calculates the modal density of a time series? Is there a reference that would show how to cal...
7 years ago | 0 answers | 0
0
answersQuestion
How Can I Speed up a loop that solves a pde?
Hello, I am solving the 4th order pde for plate vibration and after discretizing the pde and solving for W(x,y,t) or W(k,m,n...
7 years ago | 1 answer | 0
1
answerQuestion
Pausing in Matlab Mobile
I am trying to convert my scripts so that I can run them on my iPad. Most of my scripts generate many figures and have pauses af...
7 years ago | 2 answers | 0
2
answersQuestion
Reseverved Status for "CallInputString"?
Yesterday I downloaded R2013a. One of my scripts uses another script function named "CallInputString" defined as function y=C...
9 years ago | 0 answers | 0
0
answersQuestion
Can a text statement be put on a contour plot?
I have tried putting text(40, 50, 'comment') after a contour plot without succcess. Is there something I am missing? Thanks.
9 years ago | 1 answer | 0
1
answerQuestion
Bold Titles when using menu
Hello, I am using menu and, based on a previous Matlab Answers post, I am able to choose the font (Arial Rounded MT Bold) but...
9 years ago | 1 answer | 0
1
answerQuestion
Starting a Loop over again
If I am in a while/end loop and I find that I have a mistake and want to get out of the loop and start the loop over again, how ...
9 years ago | 1 answer | 0
1
answerQuestion
Does repeated use of ngrid suck up memory?
I calculate a 60,000 by 1000 grid using Matlab's ngrid function. While staying in the same script I often have to recalculate th...
9 years ago | 0 answers | 0
0
answersQuestion
How can I connect Matlab to Accelerometers?
I would like to use my Matlab to read the outputs of accelerometers. Are there products available that would allow me to use my ...
9 years ago | 1 answer | 0
1
answerQuestion
Is it possible to update two different graphs?
I want to have a time loop going that generates a snapshot of a vibrating string and on a different figure a snapshot of a vibra...
9 years ago | 1 answer | 1
1
answerQuestion
Can I Use the Special Function Keys to Interrupt a Script?
Back in the old QuickBasic and early Visual Basic days I would write code that allow me to interrupt a running algorithm by pres...
9 years ago | 2 answers | 0
2
answersQuestion
Is there a routine for recursive fft?
I have in my archives an article in the EDN magazine from September 29.1988 by a Tom Springer entitled "Sliding FFT computes fre...
9 years ago | 0 answers | 0
0
answersQuestion
Are there any Early Matlab Manuals left?
I started using Matlab circa 1989. My first copy was ver. 3.0 or 3.5 and all the routines fit on one 5.25 inch floppy disc. The ...
9 years ago | 1 answer | 2
1
answerQuestion
Fourth Order Hyperbolic PDE's
I have been struggling with trying to solve the vibrating plate equation in polar coordinates with angular dependence (non symme...
9 years ago | 2 answers | 0
