Question

PYTHON:please display code in python

Part 1: Determining the Values for a Sine Function

Write a Python program that displays and describes the equation for plotting the sine function, then prompts the user for the values A, B, C and D to be used in the calculation. Your program should then compute and display the values for Amplitude, Range, Frequency, Phase and Offset.

Example input/output for part 1:

This program creates a vertical plot based on the function y A sin (B x C) D Where: Amplitude A Frequency B (2 pi) Phase -C B Offset D Please enter the values for: A 5 B 24 D 15 Amplitude 5 Range 10 Freqency: 3.82 Phase 0 Offset 15

Part 2: Displaying a Vertical Plot Header

A vertical plot of the output of a periodic function can be produced using a series of print statements. This will be a text-based representation of a graphical display. Before we display the results of our formula, it is important to create a ‘header’ showing the range of values represented and to make the plot easier to read and understand. Recall that the Range is the distance between the highest and lowest values, (or 2 * Amplitude), and the Offset represents the mid point of the values. The low, mid and high values for a periodic function are calculated as follows:

low = Offset – Amplitude

mid = Offset

high = Offset + Amplitude

Modify your Python program so that it displays the low, mid and high point values for our periodic function and a double-line border. (HINT: Print a series of “=” characters to create the border.) Your range values will determine the length of the border.

Example input/output for part 2:

Part 3: Display a Vertical, Text-Based Plot​

Using text to display vertical plot of a periodic function has its limits. One of these is the range of textbased plots must fit within the width of the display. Another is the loss of resolution due to the plot containing only spaces and characters, (ie: We cannot display 3.25 spaces). By converting our calculated values to integers, we can still achieve a close approximation to the correct values.

Modify your Python program so that it calculates the correct result (y) for all values (x) starting with 0 up to and including 45. Below the header you displayed in Part 2, print each value (x), then a series of spaces taking into account the lowest value in your range and the calculated result (y), then finally an asterisk character (*). NOTE: The sin() function expects values in radians.

For example, if the low value in your range (calculated in Part 2) was 1, the value for x=10 and the result of the formula was y=3, your program would display: “10     * “ (ie: 10 *)

Example input / Output for Part 3

Answer 1

Python code:

import math
import sys

print "Enter A"
A = float(raw_input().strip())
print "Enter B"
B = float(raw_input().strip())
print "Enter C"
C = float(raw_input().strip())
print "Enter D"
D = float(raw_input().strip())

Amplitude = A
Frequency = B/(2*math.pi)
Phase = -C/B
Offset = D
Range = 2*A

print "Amplitude: ", Amplitude
print "Frequency: ", Frequency
print "Range: ", Range
print "Offset: ", Offset
print "Phase: ", Phase
print " "*7,"Low"," "*7,"mid"," "*7,"high"
i = 0
x = 0
while(i<=45):
   space = A*(math.sin(B*x + C)) + D
   x = x + 0.01
   space = int(space)
   s = " "
   for y in range(0,space):
       s = s + " ";
   # print space
   sys.stdout.write(s)
   sys.stdout.write("*\n")
   i = i + 1
print "\n"

Sample Output:

akasndakash-SVE1S116ENBDesktop/HomeworkLib/stn pythons python code.Py Enter A 10 Enter B 15 Enter Enter D 20 Amplitude: 10.0 Frequency 2.38732414638 Range:20.0 Offset: 20.0 Phase: 0.0 Low mid high