Ex:2 Familiarization of Scientific Computing

Functions in Python

Functions in Python Dr. Hari V S Department of Electronics and Communication College of Engineering Chengannur What You will Learn You will learn the syntax of Python functions You will learn to import the functions to other codes The Syntax The syntax used the keyword $def$ followed the name of the function again followed by a colon (:) that is then followed by an indented code block of instructions. The function def function_name(arg1.arg2,....argN): statements return results A Simple Python Function Needless to say that the statements and the return command should form an indented block. Consider a simple function that returns the sum of the input values. It is realized as the function below. def summ(x,y): return x+y Unlike MATLAB or IDL, it is possible to execute a function in the Python shell. You may type the above function in a Python shell or an enhanced Python shell such as IPython. Once the ...

Iterations and Conditions in Python

Dr. Hari V S Department of Electronics and Communication College of Engineering Chengannur What You Will Learn You will learn the syntax of for, while loops and if statement in Python You will apply these to solve a mathematical problem. For loop Python identifies code blocks by indentation. The for loop has the syntax shown below. Observe the colon at the end of the first line and the indentation at the start of the second line. Whatever is to happen under the for loop should be given as an indented block. If the indentation is wrong, it raises an exception. for i in range(0,10): print i The above code prints the integers from 0 to 9. One can modify the above code for appending the values to a blank array as shown in the following code. from scipy import * arr=[] for i in range(0,10): arr.append(i) print arr The loops being slow, the above method is not encouraged. Instead, vectorized computation is used as shown below. from scipy impor...

KTU-Scientific Computing Lab

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