# HG changeset patch
# User Shantanu <shantanu@fossee.in>
# Date 1254592203 -19800
# Node ID 84458ebb6951dade7b92f00e0a9cd28fb961fb42
# Parent  be0f830bdb71bb4d5b83eb273b3a1108d199d5d3
Modified numpy array parts.

diff -r be0f830bdb71 -r 84458ebb6951 day2/session1.tex
--- a/day2/session1.tex	Sat Oct 03 21:33:55 2009 +0530
+++ b/day2/session1.tex	Sat Oct 03 23:20:03 2009 +0530
@@ -51,7 +51,7 @@
 \setcounter{time}{0}
 \newcommand{\inctime}[1]{\addtocounter{time}{#1}{\tiny \thetime\ m}}
 
-\newcommand{\typ}[1]{\texttt{#1}}
+\newcommand{\typ}[1]{\lstinline{#1}}
 
 \newcommand{\kwrd}[1]{ \texttt{\textbf{\color{blue}{#1}}}  }
 
@@ -74,7 +74,7 @@
 % Title page
 \title[]{Matrices and Arrays\\ \& \\2D Plotting}
 
-\author[Asokan \& Prabhu] {Asokan Pichai\\Prabhu Ramachandran}
+\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
 
 \institute[FOSSEE] {FOSSEE Team}
 \date[] {11, October 2009}
@@ -214,29 +214,64 @@
   \begin{itemize}
   \item Basic \alert{elementwise} math (given two arrays \typ{a, b}):
       \typ{+, -, *, /, \%}
-  \item Inplace operators: \typ{a += b}, or \typ{add(a, b,
-      a)} etc.
+  \item Inplace operators: \typ{a += b}, or \typ{add(a, b, a)} etc. 
+  \item \typ{sum(x, axis=0)}, 
+        \typ{product(x, axis=0)},
+        \typ{dot(a, bp)}   
+  \end{itemize}
+\end{frame}
+
+\end{frame}
+\begin{frame}[fragile]
+  \frametitle{Array math cont.}
+  \begin{itemize}
   \item Logical operations: \typ{equal (==)}, \typ{not\_equal (!=)},
     \typ{less (<)}, \typ{greater (>)} etc.
-  \item Trig and other functions: \typ{sin(x), arcsin(x), sinh(x),
-      exp(x), sqrt(x)} etc.
-  \item \typ{sum(x, axis=0), product(x, axis=0), dot(a, bp)}   \inctime{10}
+  \item Trig and other functions: \typ{sin(x),}
+        \typ{arcsin(x), sinh(x),}
+      \typ{exp(x), sqrt(x)} etc.
   \end{itemize}
+\inctime{10}
 \end{frame}
 
 \subsection{Array Creation \& Slicing, Striding Arrays}
 \begin{frame}[fragile]
   \frametitle{Array creation functions}
+  \begin {block}{\typ{array(object, dtype=None, ...)}}
+  \begin{lstlisting}
+  >>> array( [2,3,4] )  
+  array([2, 3, 4])
+  \end{lstlisting}
+  \end {block}
+  \begin{block}{\typ{linspace(start, stop, num=50, ...)}}
+  \begin{lstlisting}
+  >>> linspace( 0, 2, 4 )   
+  array([0.,0.6666667,1.3333333,2.])
+  \end{lstlisting}
+  \end{block}
   \begin{itemize}
-  \item \typ{array(object, dtype=None, \ldots)}
-  \item \typ{arange(start, stop=None, step=1 \ldots)}
-  \item \typ{linspace(start, stop, num=50, \ldots)}
-  \item \typ{ones(shape, dtype=None, \ldots)}
-  \item \typ{zeros(shape, dtype=float,\ldots)}
-  \item \typ{identity(n)}
-  \item \typ{empty(shape, dtype=float,\ldots)}
-  \item \typ{ones\_like(x)}, 
-  \item \typ{zeros\_like(x)}, \typ{empty\_like(x)}
+  \item also try \typ{arange} command
+  \end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+  \frametitle{Array creation functions cont.}
+  \begin{itemize}  
+  \item \typ{ones(shape, dtype=None, ...)}  
+  \begin{lstlisting} 
+  >>>ones([2,2])
+  array([[ 1.,  1.],
+       [ 1.,  1.]])
+  \end{lstlisting}  
+  \item \typ{identity(n)} 
+  \item \typ{ones\_like(x)}  
+  \begin{lstlisting} 
+  >>>a = array([[1,2,3],[4,5,6]])
+  >>>ones_like(a)
+    array([[1, 1, 1],
+           [1, 1, 1]])
+  \end{lstlisting}
+  \item check out \typ{zeros, zeros\_like, empty}
   \end{itemize}
 \end{frame}
 
@@ -302,9 +337,11 @@
 
 \begin{frame}
     {IPython's \typ{pylab} mode}
+\begin{block}{Immediate use:}
+ \typ{\$ ipython -pylab}
+\end{block}
 \begin{itemize}
-    \item \typ{pylab}: convenient 2D plotting interface to MPL
-    \item Immediate use: \typ{ipython -pylab}
+    \item \typ{pylab}: convenient 2D plotting interface to MPL    
     \item Imports all of pylab for you!
     \item Allows for interactive plotting
 \end{itemize}
@@ -339,7 +376,7 @@
 >>> setp(l, linewidth=2.0, color='r')
 >>> l.set_linewidth(2.0)
 >>> draw() # Redraw.
->>> setp(l) # Print properties
+>>> setp(l) # Print properties.
 >>> clf() # Clear figure.
 >>> close() # Close figure.
 \end{lstlisting}
@@ -719,9 +756,9 @@
 \begin{frame}
   \frametitle{Problem Set}
   \begin{enumerate}
-      \item Write a function that plots any n-gon given \typ{n}.
+      \item Write a function that plots any regular n-gon given \typ{n}.
       \item Consider the logistic map, $f(x) = kx(1-x)$, plot it for
-          $k=2.5, 3.5$ and $4$
+          $k=2.5, 3.5$ and $4$ in the same plot.
 \end{enumerate}
 \end{frame}