adding some more example functions for reading netcdf

files, a program to plot lorenz 63 and using Tkinter
to have a resizeable window.

Author: jhendric

examples/.DS_Store

@@ -0,0 +1,65 @@
+#!/Users/hendric/anaconda3/bin/python
+# -*- coding: utf-8 -*-
+"""
+Created on Wed May  2 15:00:45 2018
+
+@author: hendric
+"""
+
+import matplotlib
+matplotlib.use('TkAgg')
+
+from numpy import arange, sin, pi
+from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
+# implement the default mpl key bindings
+from matplotlib.backend_bases import key_press_handler
+
+
+from matplotlib.figure import Figure
+
+import sys
+if sys.version_info[0] < 3:
+    import Tkinter as Tk
+else:
+    import tkinter as Tk
+
+root = Tk.Tk()
+root.wm_title("Embedding in TK")
+
+
+f = Figure(figsize=(5, 4), dpi=100)
+a = f.add_subplot(111)
+t = arange(0.0, 3.0, 0.01)
+s = sin(2*pi*t)
+
+a.plot(t, s)
+
+
+# a tk.DrawingArea
+canvas = FigureCanvasTkAgg(f, master=root)
+canvas.show()
+canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
+
+toolbar = NavigationToolbar2TkAgg(canvas, root)
+toolbar.update()
+canvas._tkcanvas.pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
+
+
+def on_key_event(event):
+    print('you pressed %s' % event.key)
+    key_press_handler(event, canvas, toolbar)
+
+canvas.mpl_connect('key_press_event', on_key_event)
+
+
+def _quit():
+    root.quit()     # stops mainloop
+    root.destroy()  # this is necessary on Windows to prevent
+                    # Fatal Python Error: PyEval_RestoreThread: NULL tstate
+
+button = Tk.Button(master=root, text='Quit', command=_quit)
+button.pack(side=Tk.BOTTOM)
+
+Tk.mainloop()
+# If you put root.destroy() here, it will cause an error if
+# the window is closed with the window manager.

examples/button/embedding_in_tk.py

@@ -0,0 +1,68 @@
+#!/Users/hendric/anaconda3/bin/python
+
+import numpy as np
+import matplotlib.pyplot as plt
+from   matplotlib.widgets import Slider, Button, RadioButtons
+
+def lorenz_63(x, y, z, s=10, r=28, b=2.667):
+    x_dot = s*(y - x)
+    y_dot = r*x - y - x*z
+    z_dot = x*y - b*z
+    return x_dot, y_dot, z_dot
+
+def gaussian(x,mu,sigma):
+    return 1.0/np.sqrt(2*np.pi*sigma**2)*np.exp(-(x-mu)**2/(2*sigma**2))
+
+dx   =  0.0001
+xmin = -6.0
+xmax =  6.0
+ymin =  0.0
+ymax =  0.6
+
+fig, ax = plt.subplots()
+plt.subplots_adjust(left=0.25, bottom=0.25)
+x = np.arange(xmin, xmax, dx)
+
+mu0    = 0.0
+sigma0 = 1.0
+
+y = gaussian(x, 0.0, 1.0)
+l, = plt.plot(x, y, lw=2, color='red')
+plt.axis([xmin,xmax,ymin,ymax])
+
+axcolor = 'lightgoldenrodyellow'
+axfreq  = plt.axes([0.35, 0.6, 0.15, 0.03], facecolor=axcolor)
+axamp   = plt.axes([0.35, 0.4, 0.15, 0.03], facecolor=axcolor)
+
+smu    = Slider(axfreq, 'mu',    -1.0,  1.0, valinit=mu0)
+ssigma =  Slider(axamp, 'sigma',  0.0, 10.0, valinit=sigma0)
+
+
+
+def update(val):
+    sigma = ssigma.val
+    mu    = smu.val
+    l.set_ydata(gaussian(x,mu,sigma))
+    fig.canvas.draw_idle()
+smu.on_changed(update)
+ssigma.on_changed(update)
+
+resetax = plt.axes([0.35, 0.2, 0.1, 0.04])
+button = Button(resetax, 'Reset', color=axcolor, hovercolor='0.975')
+
+
+def reset(event):
+    smu.reset()
+    ssigma.reset()
+button.on_clicked(reset)
+
+rax = plt.axes([0.35, 0.7, 0.15, 0.15], facecolor=axcolor)
+radio = RadioButtons(rax, ('red', 'blue', 'green'), active=0)
+
+
+def colorfunc(label):
+    l.set_color(label)
+    fig.canvas.draw_idle()
+radio.on_clicked(colorfunc)
+
+plt.show()

examples/button/interactive_button.py

@@ -0,0 +1,32 @@
+#!/Users/hendric/anaconda3/bin/python
+
+
+import tkinter
+from tkinter import ttk, Button, BOTH
+
+class Window(ttk.Frame):
+    
+    def __init__(self, master=None):
+        ttk.Frame.__init__(self, master)
+        
+        self.master = master
+        self.init_window()
+    
+    # Creation of init_window
+    def init_window(self):
+        # title of the master widget
+        self.master.title("My GUI")
+        
+        # allowing the widget to take the full space of the root window space
+        self.pack(fill=BOTH, expand=1)
+        
+        # creating a button instance
+        quitButton = Button(self, text="Abort")
+        quitButton.place(x=0,y=0)
+
+root = tkinter.Tk()
+root.geometry("400x300")
+
+app = Window(root)
+
+root.mainloop()

examples/button/window_class.py

@@ -404,7 +404,9 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {},
+   "metadata": {
+    "collapsed": true
+   },
    "outputs": [],
    "source": [
     "print(ymin,ymax)"

examples/fourier_series/Problem 1.ipynb

@@ -0,0 +1,6 @@
+{
+ "cells": [],
+ "metadata": {},
+ "nbformat": 4,
+ "nbformat_minor": 2
+}