linux search a file

find ./ -name 'program.c'

matlab string and variable

command "eval", execute string with matlab expression

E.g. read the value of variable c0

i=0;
m=strcat('c',num2str(i)); %m is a string
eval(m); %print out the value of c0

View html from a console

Command "elink"
You can open google by typing "elink www.google.com".

Design compiler for calculating fanin

Start design compile: "dc_shell -tcl_mode"
Run a scripts including a set of commands: "source fanin.tcl"
Command for obtaining fanin: "all_fanin -to icpu_adr_o[31]"
PS:
1. Often the initial libraries are set as
set search_path "/auto/edatools/synopsys/syn/v2006.06-SP4/libraries/syn"
##set TECH_DIR $synopsys_root/libraries/syn
set target_library class.db
set symbol_library class.sdb
set link_library class.db
2. If some of the results are not printed out. Add -verbose option, so "source -verbose fanin.tcl". And add a command line in fanin.tcl
"set collection_result_display_limit 220000" a large number.

Create 2D array in perl

If we want to first create space for an two-dimensional array, we first need to create space for a single row, which will have numCols columns:

for($col = 0; $col < $numCols; $col++) {

push @rowMatrix, “0”;

}

Then we need to create a matrix of these single dimension row matrices:

for($row = 0; $row < $numRows; $row++) {

push @matrix, [ @rowMatrix ];

}

Now we have a two dimensional array filled with 0’s with of size [numRows] x [numCols].

Hspice manual & Model description

Perfect manual
http://www.ece.uci.edu/docs/hspice/hspice_2001_2-3.html
Model description
http://www.ece.uci.edu/docs/hspice/hspice_2001_2-170.html

Delete columns in vim

"Ctrl + v" go to visual block mode.
navigate through arrow keys.
one you finishes your selection. press "dd" or "delete"