python search path

current directory(sys.path)-->PYTHONPATH-->installation-dependent default path; on Unix, this is usually "/usr/local/lib/python".

How Human and Robot are different?

We humans draw effeortlessly on many different cognitive capabilities for any given task, and we pursue a seemingly infinite variety of tasks. When we have difficulties, we don't freeze up; we muddle through.
                                                                               --from JOHN E. LAIRD
                                                                                          THE SOAR COGNITIVE ARCHITECTURE

Install Qt creator in UBUNTU (Manual)

Because using apt-get to install QT is not the last version, I try to install it manually.

step 1: Download file
Download the last version of QT from http://qt-project.org/downloads
For example, i download Qt Online Installer for Linux 64-bit, and then go to the download folder,
find the file "qt-linux-opensource-1.4.0-2-x86_64-online.run".

step 2: Rename file
It's with a little long name. So i rename it as "qt.run" using the command
~$ mv qt-linux-opensource-1.4.0-2-x86_64-online.run qt.run

step 3: Change the access permissions
~$ chmod -x qt.run

step 4: Run the file
~$ sudo ./qt.run

you will see the install screen like below

the you can install it step by step.

compiling opencv with g++

There are two methods in compiling opencv with g++ without IDE

First is typing following command in command line directly

~$  g++ testcv.cpp -o testcv `pkg-config opencv --cflags --libs `

ps: ` place in the left of 1 on the keyboard, not ' in the left of Enter

 Second is to set a makefile as below:

testcv: testcv.cpp
g++  -o ${@} $<  `pkg-config opencv --cflags --libs `

and then type make in command line

~$ make

note:

keep the sequence of the command. put the `pkg-config opencv --cflags --libs ` after others.

If you make a command like

~$  g++  `pkg-config opencv --cflags --libs ` testcv.cpp -o testcv

there will be error

I don't know why...><
###########################################################################
opencv on qt creater ubuntu

set .pro

INCLUDEPATH += /usr/local/include

LIBS += `pkg-config opencv --libs`

If an error occur like this

"Cannot connect creator comm socket /tmp/qt_temp.S27961/stub-socket: No such file or directory"

go to "Run Settings" and then cancel "Run in terminal"

IJulia

source from: https://github.com/JuliaLang/IJulia.jl

Using Julia language in IPython notebook.

Needs:
IPython >= 1.0
Julia >= 0.2

Installation:

open Julia and in command line input Pkg.add("IJulia") as showed in below.
julia> Pkg.add("IJulia")

Running:

in your command line input
ipython notebook --profile julia

Password:
first, open IPython and type the following code in IPython

In [1]: from IPython.lib import passwd
In [2]: passwd()
Enter password: abc (password is not showed)
Verify password: abc
Out[2]: 'sha1:67c9e60bb8b6:9ffede0825894254b2e042ea597d771089e11aed'

you can get the hashed password 'sha1:67c9e60bb8b6:9ffede0825894254b2e042ea597d771089e11aed'

and then open the file ~/.ipython/profile_julia/ipython_notebook_config.py

in window it was put in your USER folder/.ipython/profile_julia/ipython_notebook_config.py

open ipython_notebook_config.py and search c.NotebookApp.password = u''

put the hashed password between ' and ' . the example is 

c.NotebookApp.password = u'sha1:67c9e60bb8b6:9ffede0825894254b2e042ea597d771089e11aed'

then you can use your password login IJulia on web

word 方程式大括號內靠左對齊

括號內要靠左對齊先將專業改成橫式

改成橫式後再要對齊的每個方程式前加入&符號

如圖在兩個f之前加入&

再改回專業模式，用空格把if往後一致對齊

Using SBCL to run PAIP

PAIP source code and usage is from
http://www.norvig.com/paip/README.html

in SBCL command line
* (load "auxfns.lisp")
        having a debugger message:
            debugger invoked on a SB-SYS:INTERACTIVE-INTERRUPT in thread
        select 2
            2: [UNLOCK-PACKAGE] Unlock the package.

*(requires "examples")
        having a debugger message:
            debugger invoked on a SB-INT:SIMPLE-FILE-ERROR in thread
            #<THREAD "initial thread" RUNNING {1002998E73}>:
            failed to find the WRITE-DATE of /home/user/test/paip/bin/examples.bin:

revise the file "auxfns.lisp" as follows

in Line 87:
;Replace 

;(defun load-paip-file (file)
;  "Load the binary file if it exists and is newer, else load the source."
;  (let* ((src (paip-pathname file :lisp))
;  (src-date (file-write-date src))
;  (bin (paip-pathname file :binary))
;  (bin-date (file-write-date bin)))
;    (load (if (and (probe-file bin) src-date bin-date (>= bin-date src-date))
;       bin
;     src))))
;with:
(defun load-paip-file (file)
    "Load the binary file if it exists and is newer, else load the source."
        (load (paip-pathname file :lisp)))

reload "auxfns.lisp" and then try again

* (requires "examples")

* (do-example :all)    ;do all examples

* (do-example 1)       ;do first example

* (do-example '(1 2))  ;do first and second example

the solution reference from 

http://compgroups.net/comp.lang.lisp/paip-auxfns.lisp-continuable-error/697367

flask

$ sudo easy_install flask
$ sudo easy_install flask-wtf                     //for wtf
$ sudo easy_install sqlalchemy-migrate    //for db
sqlalchemy-migrate==0.7.2 is not compatible with SQLAlchemy 0.8.x. install SQLAlchemy 0.7.10 instead with pip install SQLAlchemy==0.7.10 or easy_install QLAlchemy==0.7.10

Memo for Big Data

Python
Crawler
Scrapy
http://scrapy.org/

Data Analysis

pandas

http://pandas.pydata.org/

https://pda.readthedocs.org/en/latest/chp5.html

Machine Learning

scikit-learn

http://scikit-learn.org/stable/

Graphs Analysis

NetworkX

http://networkx.github.io/

Data Base

Mongo

http://www.mongodb.org/

Distributed Computing Framework

disco

http://discoproject.org/

DPark

https://github.com/douban/dpark/

Spark

http://spark-project.org/docs/latest/python-programming-guide.html

happy

https://code.google.com/p/happy/

A Guide to Python Frameworks for Hadoop

http://blog.cloudera.com/blog/2013/01/a-guide-to-python-frameworks-for-hadoop/

Visualization

matplotlib

http://matplotlib.org/

R

RHIPE

http://www.datadr.org/

other articles
http://datacommunitydc.org/blog/2013/03/getting-started-with-python-for-data-scientists/

http://www.r-bloggers.com/stepping-up-to-big-data-with-r-and-python-a-mind-map-of-all-the-packages-you-will-ever-need/

The problem with NVIDIA GeGorce GT 640m in UBUNTU12.04

When i execute Openrave in Aspire V3-471G notebook, there is error message about "Can't set up a valid OpenGL canvas, something is seriously wrong with the system!"
The cause of this problem  is that Nvidia Optimus function is not support in Ubuntu.
So i have to install Bumblebee-UI in ubuntu.

sudo add-apt-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update

sudo apt-get install bumblebee bumblebee-nvidia linux-headers-generic

pyinstaller

convert your py file to exe file
user who can execute your program without python
Install:
just unzip to your file folder

Usage:
python pyinstaller.py /path/to/yourscript.py
or
python /path/to/pyinstaller.py yourscript.py

Weka FP Growth dataset

Weka FPGrowth needs Binary attributes, arff form likes this:


@relation FPGrowth dataset

@attribute a {1,0}
@attribute b {1,0}
@attribute c {1,0}

@data
0,0,0
0,0,1
0,1,0
0,1,1
1,0,0
1,0,1
1,1,0
1,1,1

SBCL

Steel Bank Common Lisp ( http://www.sbcl.org/ )

ubuntu:

Install SBCL

    ~$ sudo apt-get install sbcl

installed to

    /usr/bin

    /usr/lib

    /usr/share/doc

Running SBCL

    ~$ sbcl

    * (quit)     ;quit sbcl

ASDF: Another System Definition Facility ( http://common-lisp.net/project/asdf/ )

Install 

    ~$ sudo apt-get install cl-asdf

install to

    /usr/lib/asdf

    /usr/share/doc/cl-asdf

LISP中文教學

http://wiki.ubuntu.org.cn/index.php?title=Common_LISP_Hints&variant=zh-tw

http://acl.readthedocs.org/en/latest/zhTW/index.html

Common Lisp the Language, 2nd Edition

http://www.cs.cmu.edu/Groups/AI/html/cltl/cltl2.html

SHOP2

Simple Hierarchical Ordered Planner (http://www.cs.umd.edu/projects/shop/)

~$ sbcl
* (require :asdf)
* (push "/home/user/experiment/shop2/" asdf:*central-registry*)    ;push shop2 folder path to asdf
* (asdf:oos 'asdf:load-op "shop2")    ;load shop2 in asdf
* (load "~/experiment/basic")    ;load shop2 domain, problem & plan which you define