#!/usr/bin/env python
# coding: utf-8

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# #   <pre>   <span class="hgviolet"> iPython Notebook Intro </span>

# <p style="text-align: center;"><i class="icon-github icon-2x"> [melvincabatuan](https://github.com/melvincabatuan)</i></p>

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# # <span> Hello World! </span>

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message = 'Hello World!'
get_ipython().system('echo $message')


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print("Hello World!")


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# #  <span class="hgviolet"> Displaying Images </span>

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from IPython.display import Image
Image(url='https://emptyencore.files.wordpress.com/2011/05/the-witcher-2-19121.jpg')
      


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# # <span>  Displaying Equations </span>

# The *compound interest* formula states that:
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# $$ R = Pe^{rt} $$
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# where:
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# - $P$ is the principal (initial investment).
# - $r$ is the annual interest rate, as a decimal.
# - $t$ is the time in years.
# - $e$ is the base of natural logarithms.
# - $R$ is the total return after $t$ years (including principal)

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# # <span> Cross Product Formula </span>

# \begin{equation}
# \mathbf{V}_1 \times \mathbf{V}_2 =  \begin{vmatrix}
# \mathbf{i} & \mathbf{j} & \mathbf{k} \\
# \frac{\partial X}{\partial u} &  \frac{\partial Y}{\partial u} & 0 \\
# \frac{\partial X}{\partial v} &  \frac{\partial Y}{\partial v} & 0
# \end{vmatrix}  
# \end{equation}

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# # <span> Maxwell's Equations </span>

# \begin{align}
# \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\   \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
# \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
# \nabla \cdot \vec{\mathbf{B}} & = 0 
# \end{align}

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# # <span>  List Files using ls </span>

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ls


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# # <span> Import Audio </span>

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from IPython.display import Audio
Audio(url="http://www.nch.com.au/acm/8k16bitpcm.wav")


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# # <span> Adding Video </span>

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from IPython.display import YouTubeVideo
YouTubeVideo('j9jbdgZidu8')


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# # <span> Embed External Websites </span>

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from IPython.display import IFrame
IFrame('http://www.dlsu.edu.ph/', width='100%', height=540)


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# # <span> That's it for now! </span>