Research: Math, Computing and MRI » Computing

Huge Java Resource

craig — Thu, 28 Jan 2010 04:49:12 +0000

I have been working on some numerical problems in the last few weeks. Mostly related to curve fitting and interpolation. I am slowly sliding back to Java bit-by-bit though I am not sure if I will give up Python as the syntax is so tight and it is actually very fast.

Anyway, I was looking around for some curve fitting and interpolation code on the Net and found Michael Flannigan’s website which has a great resource of math, stats, optimization and some other more subtle items. His Java code is here.

I can’t even do it justice by showing the list of packages as it is about twice as long as the screen capture shown to the right.

Passwordless Login Using SSH

craig — Sat, 16 May 2009 02:44:33 +0000

Computer c1 – connect from this computer

Computer c2 – connect to this computer

1. Connect to c1
2. type: ssh-keygen -t rsa -b 2048
* default directory for keyfiles will be ~/.ssh/
* if you do not want to be prompted, leave passphrase blank
3. copy the contents of .ssh/id_rsa.pub (there should only be one line)
4. place this line on c2, in ~/.ssh/authorized_keys

Combining PDFs on a Mac

craig — Tue, 12 May 2009 02:43:16 +0000

This is from MacOSX Hints (here)

python ‘/System/Library/Automator/Combine PDF Pages.action/Contents/Resources/join.py’ -o …

GnuPG Signing of Files

craig — Tue, 12 May 2009 02:42:10 +0000

To sign a file:

$ gpg --detach-sign -u  --armor

To verify a file:

$ gpg --verify .asc