ofan's blog

Install Go Programming Language in Ubuntu

2015-04-02T05:53:00.001+07:00

Download the latest stable source code goX.X.X.src.tar.gz from https://golang.org/doc/install/source .
Extract "go" folder from the goX.X.X.src.tar.gz to home directory.

Edit file .bashrc and add:

export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin

Based on my OS (Ubuntu 14.04 64 bit), also add:

export GOARCH=amd64
export GOOS=linux

First make sure gcc and libc6-dev already installed. From terminal:
sudo apt-get install gcc libc6-dev

Now build from ~/go/src by executing all.bash

When done building, it shows:

And 3 new folder showed after installation

Then create folder named "gocode" in home directory, and write file hello.go to test the installation by running command "go run hello.go".

Building Numpy and Scipy with icc, ifort and Intel MKL

2014-05-07T16:45:00.003+07:00

My rig .
OS : Ubuntu 12.04 64 bit
Numpy : 1.8.1
Scipy: 0.14
gcc: 4.6.3
icc/ifort: 14.0.2
Intel MKL: 11.1 update 2

Modified from https://software.intel.com/en-us/articles/numpyscipy-with-intel-mkl to get passed all test in Numpy and Scipy, using https://github.com/scipy/scipy/issues/1205

Edit intel.py from numpy/distutils/fcompiler/ to change optimization to O1
Compile and install Numpy using gcc:
python setup.py config build_clib build_ext -lstdc++ install

Compile and install Scipy using icc and ifort:

python setup.py config --compiler=intelem --fcompiler=intelem build_clib --compiler=intelem --fcompiler=intelem build_ext --compiler=intelem --fcompiler=intelem -lstdc++ install

Tridiagonal Matrix Algorithm solver in Python with numpy array

2012-02-21T18:22:00.001+07:00

[Song] Gloves 2 Ali - OST Initial D

2011-10-05T10:50:00.002+07:00

I float like a butterfly, sting like a bee,
Keys to the ignition are like gloves to Ali.
To and fro, water in the sea,
The sunrise is my peace.
[Repeat]

I ride the distance, nature in me,
Nirvana coming through with my delivery.
To and fro, mountains and sea,
The twilight sets me free.
[Repeat]

- "Gloves 2 Ali" by Ghost Style

Comparing the PROC & RAM performance of Ubuntu 11.04 with Windows 7

2011-08-03T21:30:00.002+07:00

My Rig Thinkpad T420 41785ZA detail spec just google it, the only different just the RAM configuration 2 x 4GB

Comparing processor and memory perfomance using Geekbench2.1.13 in Windows 7 and Ubuntu. Only use Geekbench the 32 bit version (because the 64bit cost $19.99).

Detailed running schema + result:

Both running in AC mode
Windows 7 Professional 64 bit SP1 with all latest updates, power schema using Maximum Perfomance + Lenovo Turbo Boost enabled, scored 5844 http://browse.geekbench.ca/geekbench2/view/455508
Ubuntu 11.04 Natty 64 bit with all latest updates, scored 7366 http://browse.geekbench.ca/geekbench2/view/455514

Also i test it using commonly programming language(python + mpmath with gmpy) i used:
-The configuration and detailed python spec: (Click the image to view it bigger)
windows 7

ubuntu 11.04

-The Running time i give it try to run several times(executed +-5times, to see the best result, and give python(mpmath module) a chance to load(cached) into RAM)
windows 7

ubuntu 11.04

Arbitrary Precision using Python Mpmath

2011-06-27T03:50:00.002+07:00

Mpmath is great, powerful and easy to use to calculating equation that involve floating point.
I found several article that could be used to find minimal setting for arbitrary precision, enough the chat, let my code do the talk..

Software that used:

python ver 2.6.5 in ubuntu 10.04 64 bit
python EPD(Enthought Python Distribution) ver 7.0-2 32 bit in windows 7 64 bit, no default mpmath installation under python epd, but its available via sympy(included ver 0.14 mpmath)
python mpmath ver 0.17, http://code.google.com/p/mpmath/
gmpy -> python binding for GMP
sage version 4.7 64bit for ubuntu10.04 http://www.sagemath.org/

Below are 2 equations that could be used for searching significant setting for mpmath arbitrary precision.
1. Interval Arithmetic: Python Implementation and Applications by Stefano Taschini in SciPy2008_proceedings.pdf
GMPY Backend

SAGE Backend

Python Backend

2. Why and how to use arbitrary precision by Kaveh R. Ghazi, Vincent Lefèvre, Philippe Théveny, Paul Zimmermann in cise.pdf
GMPY Backend

SAGE Backend

Python Backend

Conclusion

different BACKEND in mpmath did not effect in result and mpmath.mp context(setting for arbitrary precision), just gives an performance effect(sage faster, than gmpy, last python)
mpmath prec value that could be gives most precision is not less than 128 bit (mpmath.mp.prec=128)
creating a mpf object is better to converted into string data type first( mp.mpf('0.1') or mp.mpf(str(0.1)))
better doing a arithmetic rational operation when possible see first code that solved using sympy

Install OpenCL and PyOpenCL in Ubuntu 10.04 LTS Lucid Lynx 64 bit

2011-06-21T17:21:00.001+07:00

After playing with Scientific Linux 6 with OpenCL and PyOpenCL, I decided to bring it into my primary OS, and yes it is Ubuntu 10.04 LTS Lucid Lynx 64 bit.

Searching through the net, I found two ways to install OpenCL

by using a packaged deb made by nou at AMD dev central forum -> Ubuntu package with ATI Stream SDK
and by installing it manually using the AMD-APP-SDK-v2.4-lnx64.tgz

Because my previous experience in SL6 is worked, so i liked to doing so within my ubuntu.

Things that needed by my system for OpenCL(testing that it works by executing 'make all' in your $AMDAPPSDKROOT -> i put it on "/home/user/AMD-APP-SDK-v2.4-lnx64/", this will built samples application that included in samples folder)

read the guide AMD_APP_SDK_Installation_Notes.pdf (it just extract and put a conf in /etc dir)
install libglu1-mesa-dev (in my case the package(header files) that missing is only this, so might be different on your system!), this needed when build a OpenCL samples
also add a AMDAPPSDK in your $PATH in .bashrc file like this

Below are some screenshoot to test sample applications under AMD-APP-SDK-v2.4-lnx64/samples/opencl/bin/x86_64/ directory if the installation of AMDAPPSDK and is working:
test using HelloCL

test using GlobalMemoryBandwidth

and notice if running an OpenCL program using all processor thread(because i didn't have a GPU capable for OpenCL

And now for PyOpenCL(made by Andreas Klöckner at http://mathema.tician.de/software/pyopencl )
To install correctly please enable the internet connectivity its needed to install required python dependency module.

In my system is need to install libboost1.40-all-dev, python-numpy and python-libxslt. (Both are available from ubuntu repository). Using command from terminal -> sudo apt-get install libboost1.40-all-dev python-numpy python-libxslt

Installing PyOpenCl:

download PyOpenCL from PyOpenCL
Notice when execute configure.py : python configure.py --cl-inc-dir=$AMDAPPSDKROOT/include --cl-lib-dir=$AMDAPPSDKROOT/lib/x86_64 --cl-libname=OpenCL
then -> python setup.py build
finnally -> sudo python setup.py install

test PyOpenCL using examples benchmark-all.py

BTW I'm just noticed that python in ubuntu is faster than in Scientific Linux 6, and it same 64 bit, same laptop.

Musing with booting time in Scientific Linux 6, Ubuntu Lucid, Windows 7

2011-05-14T07:57:00.001+07:00

Just comparing in booting and login time between Scientific Linux 6, Ubuntu Lucid Lynx 10.04.2 LTS, Windows 7 Home Premium Service Pack 1, all system in 64 bit version.

All system already installed many software that can be used for daily activity like listening various audio formats, watching various video formats, office productivity, internet browsing, updated to the current version, installed in the same HDD(one laptop) with 4 partitions(Win 7, Ubuntu, SL, swap for Linux), development programs installed(C/C++ library, java SDK, python), converting audio/video(SL not).

Specific system configuration:

Ubuntu mostly installed by many programs(my primary workstation), i didn't tuned it at all. Installed since it alpha version and just doing upgrade until now version 10.04.2 LTS, using live CD version 64 bit.
SL only for fun and learning a red hat based distro. Installed from a 64 bit live DVD version.
Windows, i use it for other software that Ubuntu not had yet, like visio, wathing HD movie using ATI vga instead using the AMD processor. And it installed an Antivirus from Microsoft Security Essential cause it rarely false alarm, and firewall using windows default, i knew it could boot faster without it, but it will make me installing windows again and again, many non Microsoft programs turned off on startup like java server, matlab server, etc. This Windows already installed when i bought the laptop, urgh yikes :( , i wonder how much the cost reduced while it not included Windows 7 :p .

The tests result

Below is the code to draw the figure(bar chart comparison) above, using Python with matplotlib module


#!/usr/bin/python

from matplotlib.pylab import arange, bar, xticks, title, ylabel, grid, show, legend

# ubuntu, sl, win
ut = [39, 7, 6]; st = [50, 10, 13]; wt = [44, 122, 20]

idx = arange(3)
wdx = 0.25

grid()
ub = bar(idx, ut, wdx, color='orange')
sb = bar(idx+wdx, st, wdx, color='red')
wb = bar(idx+wdx+wdx, wt, wdx, color='blue')
legend((ub[0], sb[0], wb[0]), ('Ubuntu 10.04', 'SL 6', 'Windows 7'))

xticks(idx+wdx, ('Booting', 'Login', 'Shutdown'))
ylabel('time in seconds')
title('Less is better')
show()

My measurement procedure:

using stopwatch in Nokia N900 so my fingers reaction time are to be considered
all systems booted from grub2 provided by Ubuntu lucid
booting time measured from grub2 until it show login window
log on time measured from pressing enter(password already entered) in login window until it show desktop and ready to use(including the LED of HDD not blinking again), well i can use(open a program) while the LED still blinking but it took the same time just like i wait LED off then open a program(yes in this case only happened with windows 7)
just open an open office writer in all system, then close it
shutdown time measured from pressing shutdown until the laptop turned off.

Scientific Linux 6

2011-04-19T18:25:00.008+07:00

Scientific Linux 6 based on Red Hat 6
Using 64 bit LiveDVD(around 2.2GB) download link SL-60-x86_64-2011-03-07-LiveDVD.iso
Installed to Acer Ferrari One(AMD Athlon X2 L310 1.2Ghz, 4 GB DDR2 RAM, vga ATI Radeon HD3200)

Some work todo:

change hostname -> /etc/sysconfig/network and edit this line HOSTNAME="<hostname>"
install ati proprietary driver from ati website, (made compiz works, but booting with default plymouth(ugly) verbose, 3d accel work)
enabling other repo(note: many dependency problem ocurred if enabling many repo at the same time), see below

install atrpms-repo-6-4.el6.x86_64.rpm
wiki EPEL repo for redhat, install epel-release-6-5.noarch.rpm
download latest rpmforge-release from http://packages.sw.be/rpmforge-release/

Test result for the moment:
worked well

webcam
power management -> sleep, hibernate
audio
display with 3d accel, compiz
vga port to external display(better than in ubuntu lucid 64 bit that hang when the monitor res are not meet the conf)
bluetooth
wifi
lan

worked but uhmm:

firefox weird, lag when scrollng page, so just install chrome(work well, no lag) from google directly http://www.google.com/chrome/ , use 'rpm -Uvh google-chrome-stable_current_x86_64.rpm' and need to install redhat-lsb pkg first
~~battery performance not as good as in ubuntu lucid lynx 64 bit~~ now battery fine after install ati proprietary driver

http://www.scientificlinux.org/

Install OpenCL and PyOpenCL in Scientific Linux 6 (RHEL 6, CEntOS 6)

2011-04-19T18:17:00.002+07:00

My rig is 64 bit system with RedHat 6 based OS, but my fera not supported for OpenCL using VGA(3200), so it using SSE2 from L310 processor :(

Note that my Scientific Linux 6 installed from a 64 bit LiveDVD version, so might be a different step if using LiveCD.

Installing AMD APP:

download AMD APP SDK from AMD-APP-SDK-v2.4-lnx64.tgz
extract and install following this AMD_APP_SDK_Installation_Notes.pdf

Test using a sample
$ ./HelloCL
HelloCL!
Getting Platform Information
Creating a context AMD platform
Getting device info
Loading and compiling CL source
Running CL program
Done
Passed!

Installing PyOpenCl:

download PyOpenCL from PyOpenCL
make sure C++ compiler(g++), python, numpy, C++ boost library are installed
Tricky when execute configure.py: python configure.py --cl-inc-dir=$HOME/AMD-APP-SDK-v2.4-lnx64/include --cl-lib-dir=$HOME/AMD-APP-SDK-v2.4-lnx64/lib/x86_64 --cl-libname=OpenCL
then just make -> su -c "make install"

Result Test Running examples benchmark-all.py
$ ./benchmark-all.py
('Execution time of test without OpenCL: ', 34.952448844909668, 's')
=============================================
('Platform name:', 'AMD Accelerated Parallel Processing')
('Platform profile:', 'FULL_PROFILE')
('Platform vendor:', 'Advanced Micro Devices, Inc.')
('Platform version:', 'OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10)')
---------------------------------------------------------------
('Device name:', 'AMD Athlon(tm) X2 Dual Core Processor L310')
('Device type:', 'CPU')
('Device memory: ', 3706, 'MB')
('Device max clock speed:', 1200, 'MHz')
('Device compute units:', 2)
Execution time of test: 0.00733989 s
Results OK

LTI Transient-Response Analysis using Python(numpy, scipy, matplotlib)

2011-04-11T13:06:00.003+07:00

In undergraduate Engineering Physics, i learn how to modelling a system by using a mathematical model of the system, to analyze the character of the system.

This script can be used to generate plot as in the Book of Modern Control Engineering 4th edition, International Edition, by Katsuhiko Ogata, Prentice Hall

Once when taking a subject Automatic Control is often to make a plot of LTI system, that generated in s(signal) domain by transforming mathematical model of the system using Laplace Transformation.

This example i took from page 307 of that book.
To plot transfer function =
(6.3223 s^2 + 18 s +12.811) / (s^4 + 6 s^3 + 11.3223 s^2 + 18s + 12.811)

The plot generated by those script as below

Pertama Kali Pake OS Berbasis GNU Linux

2011-04-11T06:53:00.000+07:00

Gak kerasa, udah 3 tahun gw pake GNU Linux, waktu itu gara2 punya netbook super lemot acer aspire one a110 yg versi Linux, so default OS nya Linux, lupa distro-nya apa namanya.

Speknya Intel Atom generasi pertama yg N270, RAM cm 1 GB n gk bisa dual channel pula nih RAM, tp bkn komponen utama(CPU n RAM) yg bikin tuh laptop lemot, tapi harddisk-nya yg ternyata cm memory sejenis flashdisk yg berkapasitas 8GB dan kemampuan Read-Write-nya very poor banget dah..

Dah gitu tuh OS bawaanny buset gk bisa dibuat apa2 n gk eye catching sama sekali, paling cm utk task2 sedehana macem ketik2 kebutuhan office n dengerin MP3. Disini gw nyoba ganti ke windows XP, yah gw saat itu adalah org Indonesia yg umum sekali sebagai pengguna produk bajakan, tp FAIL, lalu gw coba ganti ke windows 7(yah bajakan lagi) n sama FAIL.

Yah FAIL, krn ternyata windows terlalu bnyk Read-Write ke harddisk, dan harddisk gw lemot puoooll, jd tuh LED indicator nyala terus n gk bisa dipake sama sekali tuh netbook jadinya.

Kemudian gw tny ama mbah Google seputar problem solving utk masalah ini, dan membawa suatu pencerahan utk menggunakan Linux pada laptop lemot ini, wah sial mana gw gk bisa Linux lg, iya kalo gw anak Informatika atw sebangsanya bakal no problem dah utk bljr OS ginian. Maka keyword selanjutnya yg gw tny ke mbah Google adlh Linux for Newbie Dumies... wkwkwkwk... Dan si mbah jawab "Ubuntu"...

Baca2 sana sini di internet utk install Linux... Dan akhirnya netbook gw yg lemot itu ternyata bisa running normal pas pake Ubuntu GNU Linux...

Waktu itu jg bnyk2 coba distro Linux lainnya, macem Fedora, PCOSLinux, OpenSuse, Mandriva, tp kayakny yg buat nubitol Linux itu Ubuntu deh...
Karena Ubuntu yg ternyata basisnya dari Debian, bisa bikin "everything just works" krn Ubuntu yg paling up to date dlm hal kompatibilitas hardware...

Mulai saat itu hingga kini, gw menemui banyak fakta yg ternyata teknologi windows yg sifatnya proprietary gak ada apa2nya kalo seandainya vendor2 hardware memberikan full support ke Linux...

Sampai saat blog ini gw tulis, gw lg pake Firefox 4 di Ubuntu Lucid Lynx 64 bit 10.04 eit tapi dengan laptop yang berbeda... Yah gw dah ganti pake Acer Ferrari One(gw namain fera) skr...

OS bawaannya yg orisini(cieh ori) tetep gw simpen, for just in case kalo ada software yg reseh cm ada utk windows...

The Story of Linux: Commemorating 20 Years of the Linux Operating System

2011-04-10T23:29:00.002+07:00

I'am celebrating 20 years of Linux...

Scientific Computing with Python Webinar 9/18/2009:Curve Fitting

2011-04-10T16:01:00.002+07:00

Scientific Computing with Python Webinar 9/18/2009:Curve Fitting

View more presentations from Enthought, Inc..

Interpolation with SciPy and NumPy

2011-04-10T15:55:00.002+07:00

Interpolation with SciPy and NumPy

View more presentations from Enthought, Inc..

Scientific Computing with Python Webinar March 19: 3D Visualization with Mayavi

2011-04-10T15:32:00.002+07:00

Scientific Computing with Python Webinar March 19: 3D Visualization with Mayavi

View more presentations from Enthought, Inc..

Scientific Applications with Python

2011-04-10T15:19:00.002+07:00

Enthought Inc @ slideshare

Scientific Applications with Python

View more presentations from Enthought, Inc..

[Song] Mariah Carey - Hero

2011-03-30T00:58:00.001+07:00

I want to be a hero for my family and my self...

Lyrics

[Video] Scientific and parallel computing using IPython

2011-03-29T18:45:00.001+07:00

Video how to use IPython for parallel computing made by unpingco in ShowMeDo http://showmedo.com/videotutorials/series?name=N49qyIFOh

Also appeared in Ohio SuperComputer Center, titled Python for Scientific and Large Scale Computing
https://www.osc.edu/cms/sip/

Even the video do it in windows xp, i tested in Ubuntu 10.04 Lucid 64bit also worked for me, with IPython ver 0.10 , python 2.6.5

Basic Using Scite for editing source code and running program

2011-03-24T06:23:00.001+07:00

Sebelum bermain-main(atau serius) dalam menggunakan python sebagai scientific/engineering programming
Sebaiknya kuasai dulu tools-nya, belajar scite(sebagai code editor) dulu aja ah.

## Scite ##
Astaga besar sekali font pada editornya saat ane mo coba nulis source code,
cara ganti-> Options > Open Global Options File
lalu edit bagian pada line 328, ubah size menjadi 10(atw bisa disesuaikan dengan mata masing2) seperti berikut
font.monospace=font:Lucida Console,size:10

Oke mata udah nyaman saatny coding...
PENTING sebelum menulis kode, simpan file dulu dalam ekstensi .py misal kode gue ksh nama foo.py (Halah belom nulis dah ngesave dulu LOL). Tujuannya agar fitur indentasi dan syntax coloring(kodenya warna-warni oiy).

Selanjutnya silahkan coba kode berikut ditulis.

# ditulis setelah symbol '#' adalah comment, tdk di eksekusi oleh python
# classic test is print hello world in terminal/command prompt
print('Hello Python')

# membuat fungsi f(x) = x^2 + 4x + 2
def f(x):
    return (x**2 + 4*x + 2)
'''
identasi sangat penting di python
def f(x):
return (x**2 + 4*x + 2)
SALAH
'''
# memberikan nilai untuk y = f(x) dengan x = 9
x = 9
# cek nilai x
print('Nilai x ='), (x)

# hitung f(x) dgn x = 9, dan berikan hasilnya ke y
y = f(x)

# print hasil
print("Nilai y ="), (y)

# nilai x dari 0 - 10  
# walau sblmny sdh diberikan x = 9, maka x akan diganti dgn isi yg baru
x = range(11) # dapat jg dituliskan seperti -> x = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

# hitung y dengan cara
y = [ f(i) for i in x]

# cek hasil x dan y yg baru
print('x yg baru'), (x)
print('y yg baru'), (y)

# plot hasil nya
# pertama import module pyplot dari matplotlib
from matplotlib import pyplot as plt 
# meng-import pyplot sekaligus mempersingkat nama module nya menjadi plt

# plot nilai y terhadap x, dan memberikan label utk legenda
plt.plot(x, y, label='x^2 + 4x + 2')

# meng-set label x
plt.xlabel('x')
# meng-set label y
plt.ylabel('f(x)')

# show label legend utk line y thd x
plt.legend()

# terakhir menampilkan
plt.show() # yeah show your plot babe!!

Untuk langsung nge-save n me-running program, tekan F5...
It will be look like...

[Song] Katy Perry - Firework

2011-03-24T03:57:00.004+07:00

Nice song Katy Perry!!!

Inspiring and motivated lyrics, i admire this song...

To see the lyrics..

Hope someone i loved out there, sing this song for me...



Do you ever feel like a plastic bag,
drifting through the wind
wanting to start again?
Do you ever feel, feel so paper thin
like a house of cards,
one blow from caving in?

Do you ever feel already buried deep?
6 feet under screams but no one seems to hear a thing
Do you know that there's still a chance for you
'Cause there's a spark in you

You just gotta ignite, the light, and let it shine
Just own the night like the 4th of July

'Cause baby you're a firework
Come on, show 'em what you're worth
Make 'em go "Oh, oh, oh"
As you shoot across the sky-y-y

Baby, you're a firework
Come on, let your colors burst
Make 'em go "Oh, oh, oh"
You're gonna leave 'em all in awe, awe, awe

You don't have to feel like a waste of space
You're original, cannot be replaced
If you only knew what the future holds
After a hurricane comes a rainbow

Maybe you're reason why all the doors are closed
So you could open one that leads you to the perfect road
Like a lightning bolt, your heart will GLOW
And when it's time, you'll know

You just gotta ignite, the light, and let it shine
Just own the night like the 4th of July

'Cause baby you're a firework
Come on, show 'em what you're worth
Make 'em go "Oh, oh, oh"
As you shoot across the sky-y-y

Baby, you're a firework
Come on, let your colors burst
Make 'em go "Oh, Oh, Oh"
You're gonna leave 'em all in awe, awe, awe

Boom, boom, boom
Even brighter than the moon, moon, moon
It's always been inside of you, you, you
And now it's time to let it through-ough-ough

'Cause baby you're a firework
Come on, show 'em what you're worth
Make 'em go "Oh, Oh, Oh"
As you shoot across the sky-y-y

Baby, you're a firework
Come on, let your colors burst
Make 'em go "Oh, Oh, Oh"
You're gonna leave 'em all in awe, awe, awe

Boom, boom, boom
Even brighter than the moon, moon, moon
Boom, boom, boom
Even brighter than the moon, moon, moon

Instalasi Python untuk Engineering dan Science di Windows OS

2011-03-24T03:17:00.001+07:00

Paket modul complete dari Enthought, Inc beserta tools pendukungnya bisa di download secara bebas dari
http://enthought.com/products/edudownload.php
ya tinggal isi first name, last name, email, institutional lalu klik download deh.. Ukuran sekitar 260 MB, saat nge-blog ini dah versi 7.0.2 , file yg di download epd-7.0-2-win-x86.msi

Untuk versi 64bit gunakan email akademik.

Jd gak perlu install manual utk python, numpy, scipy, matplotlib, sympy, ipython seperti postingan yg utk install di ubuntu, info paket-paket yang ter-bundle ada di http://enthought.com/products/epdlibraries.php

Waktu nyoba ini ane pake Windows 7 Home edition 64 bit service pack 1, ori loh... Bawaan dari si fera, ferrari.

Yak untuk install di windows kayaknya gak perlu di share deh, secara bnyk yg pake windows daripada linux.. So sad.. Hiks.. : (
Tinggal klik sana sini acep ini itu, oh utk directory sebaiknya diganti jd C:\Python27epd\
Jaga-jaga barangkali nanti mo install python doang dari www.python.org

Jika sudah selesai maka akan ada shortcut kayak gini..

Engineering and Scientific using Python

2011-03-24T01:02:00.000+07:00

Why Python and friends(numpy, scipy, matplotlib, SAGE, etc)?
Why not matlab, mathematica, mathcad, maple and all engineering/scientific non open source software?

Pendapat pribadi dari saya, it's too many benefits and power to learn and using it as scientific/engineering computing for engineering and science problem solving. Make me confused too tell how i must start from to telling.

Who used python?
NASA, Los Alamos, High Energy Physics Large Hadron Collider CERN, and many others engineering/scientific institutional. Google are using it, even python was mentioned by Mark at Social Network Movie. LOL OOT

Konrad Hinsen from Centre de Biophysique Moléculaire (CNRS Orléans) Synchrotron SOLEIL (Saint Aubin), at euroscipy 2010 conference said "Nobody uses Matlab in my research domain." (Apa karena gak mampu beli Matlab yah?? Ah gak mungkin!! LOL)

Engineer and scientist already have a lot of task/problem that need to be solved, and python as based for computation programming will make less effort than programming using C/C++, java(syntax-nya itu loh kagak nahan... bikin ndas pecah).
Eits tapi perlu utk menguasai C/C++, jika ada kalkulasi yg kelas berat sebaiknya ditulis dalam bahasa C/C++, tapi kita juga bisa mencari 'the real C/C++ programmer' untuk mengkonversi kode python yg sudah fix tapi lambat saat kalkulasi, kalo kita gak mampu coding C/C++ sendiri.

MIT already started to using it for teaching, see http://ocw.mit.edu/index.htm
and many others institute and university.
Argh kok di tempatku kagak sih... Kenapa masih pake matlab bajakan, dan bajakan2 lainnya, padahal yah ternyata gampang bahasa pemrogamannya, install gampang, gak bikin berat komputer kalo gak lagi dipake, coba matlab? Doh tuh proses yg namanya matlab sever dah jalan pas windows booting n makan RAM gede pula. Malah pascal di mata kuliah pemprogaman komputernya :(

I think Google will find the best answer. Just google it!
BTW a founder of Python programming language(Guido Van Rossum is employed by google.

Have fun with python for engineering problem solving and scientific research computing!!! :D

Instalasi Paket Sains(Scientific) dan Teknik(Engineering) di Ubuntu

2011-03-24T00:51:00.003+07:00

Menginstal modul python untuk keperluan Sains(Scientific) dan Teknik(Engineering)
Spesifikasi saat artikel ini dibuat:
Ubuntu Lucid Lynx versi 10.04
numpy versi 1.3; scipy versi 0.7; matplotlib versi 0.99; sympy versi 0.6.6; ipython versi 0.10

Sebelumnya jangan lupa, harus ada koneksi internet...

Buka terminal aka command prompt
Login sebagai root (masukkan password anda)


sudo -i

lalu install dengan perintah


apt-get install python-numpy python-scipy python-sympy python-matplotlib python-matplotlib-data

dan tekan y untuk melanjutkan
lalu Ctrl-D utk logout sebagai root

Untuk menyesuaikan kompatibilitas dengan modul-modul versi EPD(Enthought Python Distribution) di windows, yah itu lah python ada di linux, and ada juga di windows, di N900 gue juga ada, huehehehe...

Jadi update python-numpy python-scipy python-sympy ke versi yg baru dengan cara memasukan perintah berikut(jgn lupa sebagai root)


easy_install -U numpy
easy_install -U scipy
easy_install -U sympy

saya mencoba mengupdate modul matplotlib dengan cara yg sama seperti diatas tapi gagal euy.. :(

www.ubuntu.com

www.python.org
http://numpy.scipy.org/
www.scipy.org
http://matplotlib.sourceforge.net/
http://code.google.com/p/sympy/
http://ipython.scipy.org/moin/

oro...

2011-02-25T02:47:00.000+07:00

"EVERYTHING THAT HAS A BEGINNING HAS AN END"

-The Matrix Revolution