MATLAB: Is the documentation available for the Matlab bessel function documentation circa 2004

besselMATLABmatlab 6.5

Hello, I am attempting to run an old script from circa 2003-2004, perhaps written in Matlab 6.5. It calls a bessel function, but not besseli, besselj, etc. I would like to find out which bessel function it was intending to run.I would like to run the function in the current Matlab. Are the old help menus available? Thanks for your help. -Chris

Best Answer

Yes, the documentation for R6.5SP2 is available at https://www.mathworks.com/help/releases/R13sp2/helpdesk.html

However, in that release, there is no bessel() function, as opposed to besseli() and so on.

You need to look back even further, to MATLAB 4.x . In particular, you need to look at http://ftp.task.gda.pl/site/mathworks-toolbox/matlab/specfun/ where you will find MATLAB and FORTRAN source code for the bessel functions for MATLAB in that time frame. You will be able to see that back then bessel() took two parameters and called besselj() with them.

Related Solutions

MATLAB: Is there any way to speed up the calculation of the confluent hypergeometric function

https://www.mathworks.com/matlabcentral/newsreader/view_thread/70127

"It is very tempting to write your own code for Gauss's hypergeometric
function 2F1(a;b;c;z). The definition is just a power series. But
any code that implements the definition using floating point arithmetic
is bound to have terrible numeric properties for large argument.
For example, hypergeom([],[],z) is equal to exp(z) and using the
power series alone to compute exp(z) is well known to be a bad idea.
MATLAB can't do a general hypergeom reliably using only floating
point so we have Maple do it for us, using arithmetic with as many
digits as necessary to get accurate answers.
I would be very suspicious of anybody who claims to have fast code
for hypergeometric series.
    -- Cleve
    moler@mathworks.com "

However you could experiment with https://www.mathworks.com/matlabcentral/fileexchange/5616-generalized-hypergeometric-function or https://www.mathworks.com/matlabcentral/fileexchange/29766-confluent-hypergeometric-function or https://www.mathworks.com/matlabcentral/fileexchange/12665-confluent-hypergeometric-function--kummer-function-

MATLAB: What are the main differences between 2017a and 2020a Matlab versions

Hi Grace,

It all depends on what you need to do. There are many new things in MATLAB R2020a that were not in R2017a. I would recommend looking at 2 links to help you decide.

Web page dedicated to highlithing the newest features

https://www.mathworks.com/products/matlab/whatsnew.html

Release notes - here you can search by application area for specific details

https://www.mathworks.com/help/matlab/release-notes.html

I hope these links help you make a well informed decision. If you have specific question we are always here to help.

-Will

Best Answer

Related Solutions

MATLAB: Is there any way to speed up the calculation of the confluent hypergeometric function

MATLAB: What are the main differences between 2017a and 2020a Matlab versions

Related Question