iveney

>> rng(0)
>> A=randi(10, 2, 5); b=randi(100, 2, 1);

% A =                                 b =
%      9     7     8     7     8            28
%     10     8     4     2     1            5

>> x1=A\b; x2=pinv(A)*b

% x1 =                x2 =

iveney

% Compare Ordinary Least square (no regularization), L2-reguarlized (Ridge),
% L1-regualarized (Lasso) regression in finding the sparse coefficient
% in a underdetermined linear system

rng(0);  % for reproducibility
m = 50;  % num samples
n = 200; % num variables, note that n > m

A = rand(m, n);
x = zeros(n, 1);

iveney

enum label{A,B,C,D,E,N};	// N is exactly the size
char * desc="ABCDE"

vector<int> v(N);
// do sth.
cout << desc[A] << "'s value is " << v[A] << endl;

iveney

First Level

Second

• you

iveney

/usr/local/include/boost/graph/random.hpp: In function ‘void boost::detail::randomize_property(G&, RandomGenerator&, Property, boost::edge_property_tag) [with Property = boost::edge_bundle_t, G = boost::adjacency_list<boost::setS, boost::vecS, boost::undirectedS, boost::no_property, EdgeProperty, boost::no_property, boost::listS>, RandomGenerator = boost::random::linear_congruential<int, 48271, 0, 2147483647, 399268537>]’:
/usr/local/include/boost/graph/random.hpp:255:   instantiated from ‘void boost::randomize_property(G&, RandomGenerator&) [with Property = boost::edge_bundle_t, G = Graph, RandomGenerator = boost::minstd_rand]’
random_graph.cpp:34:   instantiated from here
/usr/local/include/boost/graph/random.hpp:247: error: no match for ‘operator=’ in ‘pm. boost::adj_list_edge_property_map<Directed, Value, Ref, Vertex, Property, Tag>::operator[] [with Directed = boost::undirected_tag, Value = EdgeProperty, Ref = EdgeProperty&, Vertex = long unsigned int, Property = boost::property<boost::edge_bundle_t, Edg

iveney

#!/usr/bin/env python
# Author: Zigang Xiao <iveney # gmail.com>
# Date  : 07/12/2011

"""A python utility (wrapper for mutagen.m4a) to udpate tags for m4a file type.

Relies on m4a module in mutagen.
"""

from mutagen.m4a import M4A

iveney

#!/usr/bin/env python

import string
import re
import sys

def get_gbk(value):
    result = ''
    for i in value:
        result = result + chr(ord(i))

iveney

iveney@iveney-mbp:~$ # find the IP of dapenti.com
iveney@iveney-mbp:~$ dig dapenti.com

; <<>> DiG 9.7.3-P3 <<>> dapenti.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30857
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:

iveney

<?php
$ip = $argv[1];
$tags = get_meta_tags("http://www.geobytes.com/IpLocator.htm?GetLocation&template=php3.txt&IpAddress=$argv[1]");
print "{$tags['city']}, {$tags['region']}, {$tags['country']}";
?>

iveney

% sparse signal recovery using L1

rng(0);
N = 256; R = 3; C = 2;

% some superposition of sinoisoids, feel free to change and experiment
f = @(x) .5*sin(3*x).*cos(.1*x)+sin(1.3*x).*sin(x)-.7*sin(.5*x).*cos(2.3*x).*cos(x);
x = linspace(-10*pi, 10*pi, N);
y = f(x);