Getting GNU screen to show the current directory or command as the tab title

2008-03-09T13:53:00.000-07:00

Put the following in your .bashrc:

#if in screen, update session stuff
if [[ $TERM == 'screen' ]]; then
  function rename_screen_tab () { echo -ne "\x1bk$@\x1b\\"; return 0; }
  trap 'echo -ne "\ek${USER:0:1}@${HOSTNAME:0:1}#$BASH_COMMAND\e\\"' DEBUG
  PROMPT_COMMAND='rename_screen_tab ${USER:0:1}@${HOSTNAME:0:1}:${PWD##*/}'
fi

It shortens your user name to one letter, the host you are on to one letter, and the path to the lowest directory.

Example: b@p#vim extract_link

Correctly creating Octave sparse matrix files

2007-11-05T09:48:00.001-08:00

If you are generating sparse matrix files to load into Octave, here is the format:

# name: NAME_OF_MATRIX
# type: sparse matrix
# nnz: NUMBER_OF_NONZERO_ENTRIES
# rows: NUMBER_OF_ROWS
# columns: NUMBER_OF_COLUMNS
1 1 1
2 1 3
⋮

Note: Each line is (row, column, value). The entries should first be sorted by column number, then by row.

Wikipedia Processing

Getting GNU screen to show the current directory or command as the tab title

Correctly creating Octave sparse matrix files