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#+TITLE:
#+AUTHOR:    FOSSEE
#+EMAIL:     
#+DATE:    

#+DESCRIPTION: 
#+KEYWORDS: 
#+LANGUAGE:  en
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* 
#+begin_latex
\begin{center}
\vspace{12pt}
\textcolor{blue}{\huge Multiple Plots }
\end{center}
\vspace{18pt}
\begin{center}
\vspace{10pt}
\includegraphics[scale=0.95]{../images/fossee-logo.png}\\
\vspace{5pt}
\scriptsize Developed by FOSSEE Team, IIT-Bombay. \\ 
\scriptsize Funded by National Mission on Education through ICT\\
\scriptsize  MHRD,Govt. of India\\
\includegraphics[scale=0.30]{../images/iitb-logo.png}\\
\end{center}
#+end_latex

* Objectives
  At the end of this tutorial you will be able to
  - draw multiple plots which are overlaid
  - use the figure command
  - use the legend command 
  - switch between the plots and perform some operations on each of them like
    saving the plots.
  - create and switch between subplots

* Pre-requisite
  Spoken tutorial on -
  - Using plot interactively.
  - Embellishing a plot.
  - Saving plots.

* Exercise 1
  - Draw two plots overlaid upon each other, with the first plot
    being a parabola of the form y = 4(x ^ 2) and the second being a
    straight line of the form y = 2x + 3 in the interval -5 to 5.
  - Use colors to differentiate between the plots and use legends to
    indicate what each plot is doing.
* Exercise 2
  - Draw a line of the form y = x as one figure and another line
    of the form y = 2x + 3.
  - Switch back to the first figure, annotate the x and y intercepts.
  - Now switch to the second figure and annotate its x and y intercepts.
    Save each of them.
* Exercise 3
  - We know that the Pressure, Volume and Temperatures are held by
    the equation PV = nRT where nR is a constant. Let us assume
    nR=0.01 Joules/Kelvin and T = 200K.
    V can be in the range from 21cc to 100cc.
  - Draw two different plots as subplots, one being the Pressure
    versus Volume plot and the other being Pressure versus Temperature
    plot.
* Summary
  In this tutorial, we have learnt to –
  - draw multiple plots which are overlaid.
  - use the figure command.
  - use the legend command.
  - switch between the plots and perform some operations on each
    of them like saving the plots.
  - create subplots and to switch between them.
* Evaluation
  1. What command is used to get individual plots separately?.

  2. Which of the following is correct.

     - subplot(numRows, numCols, plotNum)
     - subplot(numRows, numCols)
     - subplot(numCols, numRows)
* Solutions
  1. figure()
  
  2. subplot(numRows, numCols, plotNum)
* 
#+begin_latex
  \begin{block}{}
  \begin{center}
  \textcolor{blue}{\Large THANK YOU!} 
  \end{center}
  \end{block}
\begin{block}{}
  \begin{center}
    For more Information, visit our website\\
    \url{http://fossee.in/}
  \end{center}  
  \end{block}
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#+end_latex