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-rw-r--r--advanced_python/slides/arrays.tex177
-rw-r--r--advanced_python/slides/modules.tex27
-rw-r--r--advanced_python/slides/plotting.tex152
3 files changed, 195 insertions, 161 deletions
diff --git a/advanced_python/slides/arrays.tex b/advanced_python/slides/arrays.tex
index 7b829f9..b565e72 100644
--- a/advanced_python/slides/arrays.tex
+++ b/advanced_python/slides/arrays.tex
@@ -7,9 +7,9 @@
\item Much faster than arrays
\end{itemize}
\begin{lstlisting}
- a1 = array([1,2,3,4])
+ In []: a1 = array([1,2,3,4])
a1 # 1-D
- a2 = array([[1,2,3,4],[5,6,7,8]])
+ In []: a2 = array([[1,2,3,4],[5,6,7,8]])
a2 # 2-D
\end{lstlisting}
\end{frame}
@@ -17,39 +17,38 @@
\begin{frame}[fragile]
\frametitle{\texttt{arange} and \texttt{shape}}
\begin{lstlisting}
- ar1 = arange(1, 5)
-
- ar2 = arange(1, 9)
- print ar2
- ar2.shape = 2, 4
- print ar2
+ In []: ar1 = arange(1, 5)
+ In []: ar2 = arange(1, 9)
+ In []: print ar2
+ In []: ar2.shape = 2, 4
+ In []: print ar2
\end{lstlisting}
\begin{itemize}
\item \texttt{linspace} and \texttt{loadtxt} also returned arrays
\end{itemize}
\begin{lstlisting}
- ar1.shape
- ar2.shape
+ In []: ar1.shape
+ In []: ar2.shape
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{Special methods}
\begin{lstlisting}
- identity(3)
+ In []: identity(3)
\end{lstlisting}
\begin{itemize}
\item array of shape (3, 3) with diagonals as 1s, rest 0s
\end{itemize}
\begin{lstlisting}
- zeros((4,5))
+ In []: zeros((4,5))
\end{lstlisting}
\begin{itemize}
\item array of shape (4, 5) with all 0s
\end{itemize}
\begin{lstlisting}
- a = zeros_like([1.5, 1, 2, 3])
- print a, a.dtype
+ In []: a = zeros_like([1.5, 1, 2, 3])
+ In []: print a, a.dtype
\end{lstlisting}
\begin{itemize}
\item An array with all 0s, with similar shape and dtype as argument
@@ -61,17 +60,17 @@
\begin{frame}[fragile]
\frametitle{Operations on arrays}
\begin{lstlisting}
- a1
- a1 * 2
- a1
+ In []: a1
+ In []: a1 * 2
+ In []: a1
\end{lstlisting}
\begin{itemize}
\item The array is not changed; New array is returned
\end{itemize}
\begin{lstlisting}
- a1 + 3
- a1 - 7
- a1 / 2.0
+ In []: a1 + 3
+ In []: a1 - 7
+ In []: a1 / 2.0
\end{lstlisting}
\end{frame}
@@ -81,25 +80,25 @@
\item Like lists, we can assign the new array, the old name
\end{itemize}
\begin{lstlisting}
- a1 = a1 + 2
- a1
+ In []: a1 = a1 + 2
+ In []: a1
\end{lstlisting}
\begin{itemize}
\item \alert{Beware of Augmented assignment!}
\end{itemize}
\begin{lstlisting}
- a, b = arange(1, 5), arange(1, 5)
- print a, a.dtype, b, b.dtype
- a = a/2.0
- b /= 2.0
- print a, a.dtype, b, b.dtype
+ In []: a, b = arange(1, 5), arange(1, 5)
+ In []: print a, a.dtype, b, b.dtype
+ In []: a = a/2.0
+ In []: b /= 2.0
+ In []: print a, a.dtype, b, b.dtype
\end{lstlisting}
\begin{itemize}
\item Operations on two arrays; element-wise
\end{itemize}
\begin{lstlisting}
- a1 + a1
- a1 * a2
+ In []: a1 + a1
+ In []: a1 * a2
\end{lstlisting}
\end{frame}
@@ -108,24 +107,24 @@
\begin{frame}[fragile]
\frametitle{Accessing \& changing elements}
\begin{lstlisting}
- A = array([12, 23, 34, 45, 56])
+ In []: A = array([12, 23, 34, 45, 56])
- C = array([[11, 12, 13, 14, 15],
+ In []: C = array([[11, 12, 13, 14, 15],
[21, 22, 23, 24, 25],
[31, 32, 33, 34, 35],
[41, 42, 43, 44, 45],
[51, 52, 53, 54, 55]])
- A[2]
- C[2, 3]
+ In []: A[2]
+ In []: C[2, 3]
\end{lstlisting}
\begin{itemize}
\item Indexing starts from 0
\item Assign new values, to change elements
\end{itemize}
\begin{lstlisting}
- A[2] = -34
- C[2, 3] = -34
+ In []: A[2] = -34
+ In []: C[2, 3] = -34
\end{lstlisting}
\end{frame}
@@ -135,49 +134,49 @@
\item Indexing works just like with lists
\end{itemize}
\begin{lstlisting}
- C[2]
- C[4]
- C[-1]
+ In []: C[2]
+ In []: C[4]
+ In []: C[-1]
\end{lstlisting}
\begin{itemize}
\item Change the last row into all zeros
\end{itemize}
\begin{lstlisting}
- C[-1] = [0, 0, 0, 0, 0]
+ In []: C[-1] = [0, 0, 0, 0, 0]
\end{lstlisting}
OR
\begin{lstlisting}
- C[-1] = 0
+ In []: C[-1] = 0
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{Accessing columns}
\begin{lstlisting}
- C[:, 2]
- C[:, 4]
- C[:, -1]
+ In []: C[:, 2]
+ In []: C[:, 4]
+ In []: C[:, -1]
\end{lstlisting}
\begin{itemize}
\item The first parameter is replaced by a \texttt{:} to specify we
require all elements of that dimension
\end{itemize}
\begin{lstlisting}
- C[:, -1] = 0
+ In []: C[:, -1] = 0
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{Slicing}
\begin{lstlisting}
- I = imread('squares.png')
- imshow(I)
+ In []: I = imread('squares.png')
+ In []: imshow(I)
\end{lstlisting}
\begin{itemize}
\item The image is just an array
\end{itemize}
\begin{lstlisting}
- print I, I.shape
+ In []: print I, I.shape
\end{lstlisting}
\begin{enumerate}
\item Get the top left quadrant of the image
@@ -191,14 +190,14 @@
\item Slicing works just like with lists
\end{itemize}
\begin{lstlisting}
- C[0:3, 2]
- C[2, 0:3]
- C[2, :3]
+ In []:C[0:3, 2]
+ In []: C[2, 0:3]
+ In []:C[2, :3]
\end{lstlisting}
\begin{lstlisting}
- imshow(I[:150, :150])
+ In []: imshow(I[:150, :150])
- imshow(I[75:225, 75:225])
+ In []: imshow(I[75:225, 75:225])
\end{lstlisting}
\end{frame}
@@ -211,15 +210,15 @@
\item The idea is similar to striding in lists
\end{itemize}
\begin{lstlisting}
- C[0:5:2, 0:5:2]
- C[::2, ::2]
- C[1::2, ::2]
+ In []: C[0:5:2, 0:5:2]
+ In []: C[::2, ::2]
+ In []: C[1::2, ::2]
\end{lstlisting}
\begin{itemize}
\item Now, the image can be shrunk by
\end{itemize}
\begin{lstlisting}
- imshow(I[::2, ::2])
+ In []: imshow(I[::2, ::2])
\end{lstlisting}
\end{frame}
@@ -252,13 +251,28 @@
\begin{frame}[fragile]
\frametitle{Least Square Fit}
\begin{lstlisting}
- l, t = loadtxt("pendulum.txt", unpack=True)
- l
- t
- tsq = t * t
- plot(l, tsq, 'bo')
- plot(l, tsq, 'r')
- \end{lstlisting}
+ In []: L, t = loadtxt("pendulum.txt",
+ unpack=True)
+ In []: L
+ In []: t
+ In []: tsq = t * t
+ In []: plot(L, tsq, 'bo')
+\end{lstlisting}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{$L$ vs. $T^2$ - Scatter}
+Linear trend visible.
+\begin{figure}
+\includegraphics[width=4in]{data/L-Tsq-points}
+\end{figure}
+\end{frame}
+
+\begin{frame}[fragile]
+ \frametitle{Least Square Fit}
+\begin{lstlisting}
+ In []: plot(L, tsq, 'r')
+\end{lstlisting}
\begin{itemize}
\item Both the plots, aren't what we expect -- linear plot
\item Enter Least square fit!
@@ -266,6 +280,23 @@
\end{frame}
\begin{frame}[fragile]
+\frametitle{$L$ vs. $T^2$ - Line}
+This line does not make any mathematical sense.
+\vspace{-0.1in}
+\begin{figure}
+\includegraphics[width=4in]{data/L-Tsq-Line}
+\end{figure}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{$L$ vs. $T^2$ - Least Square Fit}
+This is what our intention is.
+\begin{figure}
+\includegraphics[width=4in]{data/least-sq-fit}
+\end{figure}
+\end{frame}
+
+\begin{frame}[fragile]
\frametitle{Matrix Formulation}
\begin{itemize}
\item We need to fit a line through points for the equation $T^2 = m \cdot L+c$
@@ -295,34 +326,36 @@
\begin{frame}[fragile]
\frametitle{Least Square Fit Line}
\begin{lstlisting}
- A = array((l, ones_like(l)))
- A.T
- A
+ In []: A = array((L, ones_like(L)))
+ In []: A = A.T
+ In []: A
\end{lstlisting}
\begin{itemize}
\item We now have \texttt{A} and \texttt{tsq}
\end{itemize}
\begin{lstlisting}
- result = lstsq(A, tsq)
+ In []: result = lstsq(A, tsq)
\end{lstlisting}
\begin{itemize}
\item Result has a lot of values along with m and c, that we need
\end{itemize}
\begin{lstlisting}
- m, c = result[0]
- print m, c
+ In []: m, c = result[0]
+ In []: print m, c
\end{lstlisting}
\end{frame}
+
+
\begin{frame}[fragile]
\frametitle{Least Square Fit Line}
\begin{itemize}
\item Now that we have m and c, we use them to generate line and plot
\end{itemize}
\begin{lstlisting}
- tsq_fit = m * l + c
- plot(l, tsq, 'bo')
- plot(l, tsq_fit, 'r')
+ In []: tsq_fit = m * L + c
+ In []: plot(L, tsq, 'bo')
+ In []:plot(L, tsq_fit, 'r')
\end{lstlisting}
\end{frame}
diff --git a/advanced_python/slides/modules.tex b/advanced_python/slides/modules.tex
index 957789a..edae339 100644
--- a/advanced_python/slides/modules.tex
+++ b/advanced_python/slides/modules.tex
@@ -6,13 +6,13 @@
\item Script to print `hello world' -- \texttt{hello.py}
\end{itemize}
\begin{lstlisting}
- print "Hello world!"
+ In []: print "Hello world!"
\end{lstlisting}
\begin{itemize}
\item We have been running scripts from IPython
\end{itemize}
\begin{lstlisting}
- %run -i hello.py
+ In []: %run -i hello.py
\end{lstlisting}
\begin{itemize}
\item Now, we run from the shell using python
@@ -28,9 +28,9 @@
\item Save the following in \texttt{sine\_plot.py}
\end{itemize}
\begin{lstlisting}
- x = linspace(-2*pi, 2*pi, 100)
- plot(x, sin(x))
- show()
+ In []: x = linspace(-2*pi, 2*pi, 100)
+ In []: plot(x, sin(x))
+ In []: show()
\end{lstlisting}
\begin{itemize}
\item Now, let us run the script
@@ -103,19 +103,20 @@
\item Save it as \texttt{gcd\_script.py}
\end{itemize}
\begin{lstlisting}
- def gcd(a, b):
- while b:
- a, b = b, a%b
- return a
+ In []: def gcd(a, b):
+ .... while b:
+ .... a, b = b, a%b
+ .... return a
+ ....
\end{lstlisting}
\begin{itemize}
\item Also add the tests to the file
\end{itemize}
\begin{lstlisting}
- if gcd(40, 12) == 4 and gcd(12, 13) == 1:
- print "Everything OK"
- else:
- print "The GCD function is wrong"
+ .... if gcd(40, 12) == 4 and gcd(12, 13) == 1:
+ .... print "Everything OK"
+ .... else:
+ .... print "The GCD function is wrong"
\end{lstlisting}
\begin{lstlisting}
$ python gcd_script.py
diff --git a/advanced_python/slides/plotting.tex b/advanced_python/slides/plotting.tex
index 4f8d51f..6fa31e6 100644
--- a/advanced_python/slides/plotting.tex
+++ b/advanced_python/slides/plotting.tex
@@ -9,8 +9,8 @@
$ ipython -pylab
\end{lstlisting} % $
\begin{lstlisting}
- p = linspace(-pi,pi,100)
- plot(p, cos(p))
+ In []: p = linspace(-pi,pi,100)
+ In []: plot(p, cos(p))
\end{lstlisting}
\end{frame}
@@ -20,11 +20,11 @@
\begin{itemize}
\item \texttt{p} has a hundred points in the range -pi to pi
\begin{lstlisting}
- print p[0], p[-1], len(p)
+ In []: print p[0], p[-1], len(p)
\end{lstlisting}
\item Look at the doc-string of \texttt{linspace} for more details
\begin{lstlisting}
- linspace?
+ In []: linspace?
\end{lstlisting}
\end{itemize}
\begin{itemize}
@@ -38,50 +38,50 @@
\begin{frame}[fragile]
\frametitle{Plot color and thickness}
\begin{lstlisting}
- clf()
- plot(p, sin(p), 'r')
+ In []: clf()
+ In []: plot(p, sin(p), 'r')
\end{lstlisting}
\begin{itemize}
\item Gives a sine curve in Red.
\end{itemize}
\begin{lstlisting}
- plot(p, cos(p), linewidth=2)
+ In []: plot(p, cos(p), linewidth=2)
\end{lstlisting}
\begin{itemize}
\item Sets line thickness to 2
\end{itemize}
\begin{lstlisting}
- clf()
- plot(p, sin(p), '.')
+ In []: clf()
+ In []:plot(p, sin(p), '.')
\end{lstlisting}
\begin{itemize}
\item Produces a plot with only points
\end{itemize}
\begin{lstlisting}
- plot?
+ In []: plot?
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{\texttt{title}}
\begin{lstlisting}
- x = linspace(-2, 4, 50)
- plot(x, -x*x + 4*x - 5, 'r', linewidth=2)
- title("Parabolic function -x^2+4x-5")
+ In []: x = linspace(-2, 4, 50)
+ In []: plot(x, -x*x + 4*x - 5, 'r', linewidth=2)
+ In []: title("Parabolic function -x^2+4x-5")
\end{lstlisting}
\begin{itemize}
\item We can set title using \LaTeX~
\end{itemize}
\begin{lstlisting}
- title("Parabolic function $-x^2+4x-5$")
+ In []: title("Parabolic function $-x^2+4x-5$")
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]
\frametitle{Axes labels}
\begin{lstlisting}
- xlabel("x")
- ylabel("f(x)")
+ In []: xlabel("x")
+ In []:ylabel("f(x)")
\end{lstlisting}
\begin{itemize}
\item We could, if required use \LaTeX~
@@ -91,7 +91,7 @@
\begin{frame}[fragile]
\frametitle{Annotate}
\begin{lstlisting}
- annotate("local maxima", xy=(2, -1))
+ In []: annotate("local maxima", xy=(2, -1))
\end{lstlisting}
\begin{itemize}
\item First argument is the annotation text
@@ -103,8 +103,8 @@
\begin{frame}[fragile]
\frametitle{Limits of Plot area}
\begin{lstlisting}
- xlim()
- ylim()
+ In []: xlim()
+ In []: ylim()
\end{lstlisting}
\begin{itemize}
\item With no arguments, \texttt{xlim} \& \texttt{ylim} get the
@@ -112,10 +112,10 @@
\item New limits are set, when arguments are passed to them
\end{itemize}
\begin{lstlisting}
- xlim(-4, 5)
+ In []: xlim(-4, 5)
\end{lstlisting}
\begin{lstlisting}
- ylim(-15, 2)
+ In []: ylim(-15, 2)
\end{lstlisting}
\end{frame}
@@ -126,17 +126,17 @@
\begin{itemize}
\item To see the history of commands, we typed
\begin{lstlisting}
- %hist
+ In []: %hist
\end{lstlisting}
\item All commands, valid or invalid, appear in the history
\item \texttt{\%hist} is a magic command, available only in IPython
\end{itemize}
\begin{lstlisting}
- %hist 5
+ In []: %hist 5
# last 5 commands
\end{lstlisting}
\begin{lstlisting}
- %hist 5-10
+ In []: %hist 5-10
# commands between 5 and 10
\end{lstlisting}
\end{frame}
@@ -150,7 +150,7 @@
\item \texttt{\%save} magic command to save the commands to a file
\end{itemize}
\begin{lstlisting}
- %save plot_script.py 1 3-6 8
+ In []: %save plot_script.py 1 3-6 8
\end{lstlisting}
\begin{itemize}
\item File name must have a \texttt{.py} extension
@@ -160,7 +160,7 @@
\begin{frame}[fragile]
\frametitle{Running the script}
\begin{lstlisting}
- %run -i plot_script.py
+ In []: %run -i plot_script.py
\end{lstlisting}
\begin{itemize}
\item There were no errors in the plot, but we don't see it!
@@ -168,7 +168,7 @@
\item We need to explicitly ask for the image to be shown
\end{itemize}
\begin{lstlisting}
- show()
+ In []: show()
\end{lstlisting}
\begin{itemize}
\item \texttt{-i} asks the interpreter to check for names,
@@ -183,9 +183,9 @@
\begin{frame}[fragile]
\frametitle{\texttt{savefig}}
\begin{lstlisting}
- x = linspace(-3*pi,3*pi,100)
- plot(x,sin(x))
- savefig('sine.png')
+ In []: x = linspace(-3*pi,3*pi,100)
+ In []: plot(x,sin(x))
+ In []: savefig('sine.png')
\end{lstlisting}
\begin{itemize}
\item \texttt{savefig} takes one argument
@@ -199,16 +199,16 @@
\begin{frame}[fragile]
\frametitle{Overlaid plots}
\begin{lstlisting}
- x = linspace(0, 50, 10)
- plot(x, sin(x))
+ In []: x = linspace(0, 50, 10)
+ In []: plot(x, sin(x))
\end{lstlisting}
\begin{itemize}
\item The curve isn't as smooth as we expected
\item We chose too few points in the interval
\end{itemize}
\begin{lstlisting}
- y = linspace(0, 50, 500)
- plot(y, sin(y))
+ In []: y = linspace(0, 50, 500)
+ In []: plot(y, sin(y))
\end{lstlisting}
\begin{itemize}
\item The plots are overlaid
@@ -219,14 +219,14 @@
\begin{frame}[fragile]
\frametitle{Legend}
\begin{lstlisting}
- legend(['sine-10 points', 'sine-500 points'])
+ In []: legend(['sine-10 points', 'sine-500 points'])
\end{lstlisting}
\begin{itemize}
\item Placed in the location, \texttt{pylab} thinks is `best'
\item \texttt{loc} parameter allows to change the location
\end{itemize}
\begin{lstlisting}
- legend(['sine-10 points', 'sine-500 points'],
+ In []: legend(['sine-10 points', 'sine-500 points'],
loc='center')
\end{lstlisting}
\end{frame}
@@ -234,24 +234,24 @@
\begin{frame}[fragile]
\frametitle{Plotting in separate figures}
\begin{lstlisting}
- clf()
- x = linspace(0, 50, 500)
- figure(1)
- plot(x, sin(x), 'b')
- figure(2)
- plot(x, cos(x), 'g')
+ In []: clf()
+ In []: x = linspace(0, 50, 500)
+ In []: figure(1)
+ In []: plot(x, sin(x), 'b')
+ In []:figure(2)
+ In []: plot(x, cos(x), 'g')
\end{lstlisting}
\begin{itemize}
\item \texttt{figure} command allows us to have plots separately
\item It is also used to switch context between the plots
\end{itemize}
\begin{lstlisting}
- savefig('cosine.png')
- figure(1)
- title('sin(y)')
- savefig('sine.png')
- close()
- close()
+ In []: savefig('cosine.png')
+ In []: figure(1)
+ In []: title('sin(y)')
+ In []: savefig('sine.png')
+ In []: close()
+ In []: close()
\end{lstlisting}
\begin{itemize}
\item \texttt{close('all')} closes all the figures
@@ -261,7 +261,7 @@
\begin{frame}[fragile]
\frametitle{Subplots}
\begin{lstlisting}
- subplot(2, 1, 1)
+ In []: subplot(2, 1, 1)
\end{lstlisting}
\begin{itemize}
\item number of rows
@@ -269,13 +269,13 @@
\item plot number, in serial order, to access or create
\end{itemize}
\begin{lstlisting}
- subplot(2, 1, 2)
- x = linspace(0, 50, 500)
- plot(x, cos(x))
+ In []: subplot(2, 1, 2)
+ In []: x = linspace(0, 50, 500)
+ In []: plot(x, cos(x))
- subplot(2, 1, 1)
- y = linspace(0, 5, 100)
- plot(y, y ** 2)
+ In []: subplot(2, 1, 1)
+ In []: y = linspace(0, 5, 100)
+ In []: plot(y, y ** 2)
\end{lstlisting}
\end{frame}
@@ -289,8 +289,8 @@
\item We read the data using \texttt{loadtxt}
\end{itemize}
\begin{lstlisting}
- primes = loadtxt('primes.txt')
- print primes
+ In []: primes = loadtxt('primes.txt')
+ In []: print primes
\end{lstlisting}
\begin{itemize}
\item \texttt{primes} is a sequence of floats
@@ -306,8 +306,8 @@
\item \texttt{loadtxt} requires both columns to be of same length
\end{itemize}
\begin{lstlisting}
- pend = loadtxt('pendulum.txt')
- print pend
+ In []: pend = loadtxt('pendulum.txt')
+ In []: print pend
\end{lstlisting}
\begin{itemize}
\item \texttt{pend} is not a simple sequence like \texttt{primes}
@@ -317,9 +317,9 @@
\begin{frame}[fragile]
\frametitle{Unpacking with \texttt{loadtxt}}
\begin{lstlisting}
- L, T = loadtxt('pendulum.txt', unpack=True)
- print L
- print T
+ In []: L, T = loadtxt('pendulum.txt', unpack=True)
+ In []: print L
+ In []: print T
\end{lstlisting}
\begin{itemize}
\item We wish to plot L vs. $T^2$
@@ -327,9 +327,9 @@
\item (We could instead iterate over T and calculate)
\end{itemize}
\begin{lstlisting}
- Tsq = square(T)
+ In []: Tsq = square(T)
- plot(L, Tsq, '.')
+ In []: plot(L, Tsq, '.')
\end{lstlisting}
\end{frame}
@@ -341,11 +341,11 @@
\item Read the values and make an error bar plot
\end{itemize}
\begin{lstlisting}
- L, T, L_err, T_err = \
- loadtxt('pendulum_error.txt', unpack=True)
- Tsq = square(T)
+ In []: L, T, L_err, T_err = \
+ In []: loadtxt('pendulum_error.txt', unpack=True)
+ In []: Tsq = square(T)
- errorbar(L, Tsq , xerr=L_err,
+ In []: errorbar(L, Tsq , xerr=L_err,
yerr=T_err, fmt='b.')
\end{lstlisting}
\end{frame}
@@ -361,10 +361,10 @@
\item Let's plot the data of profits of a company
\end{itemize}
\begin{lstlisting}
- year, profit = loadtxt('company-a-data.txt',
+ In []: year, profit = loadtxt('company-a-data.txt',
dtype=type(int()))
- scatter(year, profit)
+ In []: scatter(year, profit)
\end{lstlisting}
\begin{itemize}
\item \alert{\texttt{dtype=int}; default is float}
@@ -374,11 +374,11 @@
\begin{frame}[fragile]
\frametitle{Pie Chart \& Bar Chart}
\begin{lstlisting}
- pie(profit, labels=year)
+ In []: pie(profit, labels=year)
\end{lstlisting}
\begin{lstlisting}
- bar(year, profit)
+ In []: bar(year, profit)
\end{lstlisting}
\end{frame}
@@ -388,11 +388,11 @@
\item Plot a \texttt{log-log} chart of $y=5x^3$ for x from 1 to 20
\end{itemize}
\begin{lstlisting}
- x = linspace(1,20,100)
- y = 5*x**3
+ In []: x = linspace(1,20,100)
+ In []: y = 5*x**3
- loglog(x, y)
- plot(x, y)
+ In []: loglog(x, y)
+ In []: plot(x, y)
\end{lstlisting}
\begin{itemize}
\item Look at \url{http://matplotlib.sourceforge.net/contents.html}
generated by cgit (git 2.34.1) at 2025-03-13 14:01:23 +0000