amarvutha

# Interactive tuner for broadband coax-waveguide launcher
# Analytic formulae from Slater, / Microwave Transmission /
# Amar, version 7, 2013-04-09
# Changes: 
#           v2: S-parameters and Smith plot
#           v3: polar smith plot
#           v4: S and T matrices to get at S12 phase, objectized circuit description. Reverted to cartesian smith plot. 
#           v5: double launcher configuration, freed up 'a' as parameter
#           v6: cleaned up code, parameters are general and swappable now, plotting and tuning is modular
#           v7: phase and amplitude sensitivity plots

amarvutha

def test2(x):
    """ Sieve of Eratosthenes """
    p = []
    mask = range(2,x-1)
    
    while len(mask)>0:
        p.append(mask[0])
        del mask[::p[-1]]
        
    return p

amarvutha

import pylab as plt
import numpy as np

def primes(x):
    p = []
    mask = range(2,x-1)
    
    while len(mask)>0:
        p.append(mask[0])
        del mask[::p[-1]]

amarvutha

# Evaluating zeta functions using Parseval sums
# Amar
# version 1, Aug 2013

from sympy import *
from sympy import init_printing
init_printing() 

n = symbols('n',integer=True)
s = symbols('s',rational=True)

amarvutha

# Display webcam image, plus plasma diagnostics
# version 2, 2013-09-25
# Amar
# Changelog:
#       v2: Very slight modification of http://matplotlib.org/examples/animation/dynamic_image.html

import numpy as np
import cv2
import time
import matplotlib.animation as animation

amarvutha

# Filtering utilities

import numpy as np
from numpy import pi
from numpy import fft
from scipy import signal
import scipy.signal as sig
import pylab as plt

#### Functions #################

amarvutha

# Bloch sphere
# Amar Vutha, 2013-08-31

from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np

# Basic Bloch sphere
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')

amarvutha

import os, subprocess

os.chdir("c:/Program Files (x86)/eSpeak/command_line/")
speakString = "This parrot is no more. It has ceased to be. It's expired and gone to meet its maker. This is a late parrot. It's a stiff. Bereft of life, it rests in peace. If you hadn't nailed it to the perch, it would be pushing up the daisies. It's rung down the curtain and joined the choir invisible. This is an ex-parrot."
subprocess.call(["espeak","-ven+f5",`speakString`])

amarvutha

# Controlling the MixNV (Windfreak Technologies) rf synthesizer
# Amar Vutha
# version 1
import serial
import numpy as np
import time

usbPort = "/dev/ttyACM0"
sleepTime = 0.01

amarvutha

# Plot log files
# version 3
# Amar 
# Changes: v2: 2012/11/27: Date & time display using native matplotlib, instead of unix timestamp
#          v3: 2013/10/10: Rewritten completely using matplotlib animation, and slider for selectable range

import numpy as np
import random
import os
os.chdir("c:/data/googledrive/logs")