Q: Matlab - How do you get numbers to format with zeros?

i.e. I have a bunch of file names that look like 0001, 0002 .... 0237 and so on. To create strings in order to load the files, I have to do something like

Filenumber = 1:237;

for x = Filenumber

Name = num2str(x)

eval('load(' Name ')')

end

but that doesn't work because I need the Filenumber to be '0001' not just '1'. :(

A. Use num2str(20,'%04i')

Q. How do you make Spotlight search for system files by default?

A. The published solution below will require you to use Command+F in finder to activate, but its nice because now you have the choice. Normal spotlight will act.. normally. Command+f will include all system files.

http://www.macosxhints.com/article.php?story=20080229204517495&query=finder%2Bsearch

Q. What does ~/ mean when describing folders on a mac?

A. The tilda refers to the users home directory.

i.e. ~'/Library' = 'jlross/Library' for me

Challenge!

This is a challenge to any and all computer hackers, wizards, geeks
and guru's out there. Below is a link to a LATEX file that was
corrupted by Time Machine. I have an entire hard drive full of files
just like this. If you can decrypt the mess that this file is, I am
offering a $100 reward (assuming the decryption allows me to decrypt
other files on my computer as well) Hey, its not much money, but i'm
a grad student so what can you expect?

Good luck!

Tex File

Q. How do you delete a whole column of a matrix in Matlab?

A. Use empty brackets!  i.e

A =[1 2 3 ; 4 5 6 ; 7 8 9]

A(2, :) = []

A=[1 2 3 ; 7 8 9]

Q. What is the equivalent of the Matlab Eval command in Igor Pro?

A.  The simple answer is $  but for more information you nned to see Chapter 1 in the Programming and Reference guide.  section III-16 under Strings, String Expressions, Strings in Text Waves.  

Example:

String Str1 = "Today_is_" + date()

Make $Str1

Q. How do you put an inline reference number into a Latex document?

"For example in reference # you can see that..."  

The problem is that Latex normally uses superscripts everytime you use the \cite command.  

A.  So instead you need to use the \citenum command