Python for Data Processing and Plo3ng Han-Wei Shen The Ohio State - PowerPoint PPT Presentation

Python for Data Processing and Plo3ng Han-Wei Shen The Ohio State University (with help from Jonathan Woodring at Los Alamos NaConal Laboratory)

What is Python? • Fast code development and test • A dynamically typed language – You do not need to declare the type of a variable • Syntax is very much C-like • A huge number of packages for doing almost everything (numpy, scipy, matplotlib, …) • AutomaCc memory management • FuncCons can be passed around as arguments • Can bind to C code easily for speed (from Jonathan Woodring, Los Alamos NL)

Variable Assignment

More Assignment

Lists

Slicing Lists

Slicing Lists

IteraCng Lists with Loops

IteraCng Lists with Loops

If-Then-Else

Tuples are Immutable

DicConaries

FuncCon DefiniCons

File I/O

NumPy The most popular package for scienCfic compuCng • – Efficient N-dimensional arrays – Useful for linear algebra, data transformaCon etc. Get Numpy from hYp://www.scipy.org •

NumPy The most popular package for scienCfic compuCng • – Efficient N-dimensional arrays – Useful for linear algebra, data transformaCon etc. Get Numpy from hYp://www.scipy.org •

NumPy Slicing

NumPy Array Reshaping

NumPy Array BroadcasCng

NumPy Linear Algebra

NumPy I/O

Matplotlib Python 2D plo3ng package that produces publicaCon quality figures • Get it from hYp://matplotlib.org •

Line Graphs

Images

Histograms