Thread Subject: MATLAB name puns/puzzles

Here are a few MATLAB puns. The answer to each is the name
of a MathWorker. You must also explain why. Answers will
appear after a while.

R = qr (6.02214179e+23)
schur (L|n)
load penny ; and (find (r == etree (P)))
P*A'+Q*U*L(:,n)
save perrier psi(weekday(3))
edge (convhull, 'canny')
swapbytes (j:k)

The last one (an operator, not a complete command) isn't a
MathWorker:

( )'*eye(m)\( )

Have fun!

"Tim Davis" <davis@cise.ufl.edu> wrote in message
<f9870k$fm1$1@fred.mathworks.com>...
> Here are a few MATLAB puns. The answer to each is the name
> of a MathWorker. You must also explain why. Answers will
> appear after a while.
>
> R = qr (6.02214179e+23)
> schur (L|n)
> load penny ; and (find (r == etree (P)))
> P*A'+Q*U*L(:,n)
> save perrier psi(weekday(3))
> edge (convhull, 'canny')
> swapbytes (j:k)
>
> The last one (an operator, not a complete command) isn't a
> MathWorker:
>
> ( )'*eye(m)\( )
>
> Have fun!

The answers are below (scroll down).
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R = qr (6.02214179e+23)

   The qr factorization of Avagadro's number (a mole),
   or the mole R. The mole is cleaved into its factors.
   ... Cleve Moler

schur (L|n)

   The Schur complement of L or en ... Loren Shure.

load penny ; and (find (r == etree (P)))

    With Penny.dat, compute the etree. Then f(r==etree(P))
    returns a list of nodes that are the sons of R, which
    are then and'ed together. ... Penny Anderson

P*A'+Q*U*L(:,n)

    Pat Quillen

save perrier psi(weekday(3))

    weekday(3) is "Mon" (Monday), and psi(mon) then gets
    saved into perrier.mat, or eau.mat. psi(mon) eau.mat
    .... Matt Simoneau

edge (convhull, 'canny')

    edge(..,'canny') uses the Derivative Of Uh Gaussian
    (or DOUG), applied to the convex Hull ... Doug Hull.

swapbytes (j:k)

    "doc colon" uses the j:k example, which would be
    pronounced "Jack". Then swapbytes computes the Little-
    endian form. ... Jack Little.


The last one (an operator, not a complete command) isn't a
MathWorker:

( )'*eye(m)\( )

    '*eye(m) == Tim. Then you've heard of the Gaussian,
    Laplacian, etc? Well, it was a mathematical ancestor
    of mine that invented the Davissian operator, which has
    been corrupted over the years to "division" (OK, not
    really, but it makes a nice pun anyway).
    ... Tim Davis


eye(vander(why))?

I'm a MATLAB pun! Thanks Tim. I'm using it on my profile:

http://www.mathworks.com/matlabcentral/fileexchange/loadAuthor.do?objectType=author&objectId=968557

"Matthew Simoneau" <matthew@mathworks.com> wrote
> I'm a MATLAB pun! Thanks Tim. I'm using it on my profile:

Avec plaisir ;-) !

[This post brought to courtesy of the HackWorks, producer of
MATLAF and other pun-to-use software tools. For your own
"my-name-in-MATLAF", please send your name, along with cash
or money order for negative $0.02 ... and I'll give it a
quick hack to see if I can make it work ...]

I failed at "Helen Chen" because there is no explicit
chain-rule symbolic simplification method in the Symbolic
Toolbox. If there were, it would be great:

L = chol ( ... ) ;
chain (L(:,n))

Helen being the nth column of L of course.

:-}

"Tim Davis" <davis@cise.ufl.edu> wrote in message
<f9870k$fm1$1@fred.mathworks.com>...
> Here are a few MATLAB puns. The answer to each is the
name
> of a MathWorker. You must also explain why. Answers will
> appear after a while.
>
> R = qr (6.02214179e+23)
> schur (L|n)
> load penny ; and (find (r == etree (P)))
> P*A'+Q*U*L(:,n)
> save perrier psi(weekday(3))
> edge (convhull, 'canny')
> swapbytes (j:k)
>
> The last one (an operator, not a complete command) isn't a
> MathWorker:
>
> ( )'*eye(m)\( )
>
> Have fun!

Ouch. OW! OW! OW!

Scott

"Tim Davis" <davis@cise.ufl.edu> wrote in message
<f9870k$fm1$1@fred.mathworks.com>...
> Here are a few MATLAB puns. The answer to each is the
name
> of a MathWorker. You must also explain why. Answers will
> appear after a while.
>
> R = qr (6.02214179e+23)
> schur (L|n)
> load penny ; and (find (r == etree (P)))
> P*A'+Q*U*L(:,n)
> save perrier psi(weekday(3))
> edge (convhull, 'canny')
> swapbytes (j:k)
>
> The last one (an operator, not a complete command) isn't a
> MathWorker:
>
> ( )'*eye(m)\( )
>
> Have fun!

Ouch. OW! OW! OW!

Scott