diff options
Diffstat (limited to 'day1')
| -rwxr-xr-x | day1/cheatsheet2.tex | 100 |
1 files changed, 76 insertions, 24 deletions
diff --git a/day1/cheatsheet2.tex b/day1/cheatsheet2.tex index c80db4f..a29d436 100755 --- a/day1/cheatsheet2.tex +++ b/day1/cheatsheet2.tex @@ -34,9 +34,50 @@ In []: y = [7, 11, 15, 19] In []: plot(x, y) In []: clf() In []: plot(x, y, 'o') # Plotting Circles -#Dots - '.', #Dashed lines - '--' #Lines - '-' \end{lstlisting} +\subsection{Line style/marker} +\begin{lstlisting} +The following format string characters are accepted +to control the line style or marker: + + ================ =============================== + character description + ================ =============================== + '-' solid line style + '--' dashed line style + '-.' dash-dot line style + ':' dotted line style + '.' point marker + ',' pixel marker + 'o' circle marker + 'v' triangle_down marker + '^' triangle_up marker + '<' triangle_left marker + '>' triangle_right marker + '1' tri_down marker + '2' tri_up marker + '3' tri_left marker + '4' tri_right marker + 's' square marker + 'p' pentagon marker + '*' star marker + 'h' hexagon1 marker + 'H' hexagon2 marker + '+' plus marker + 'x' x marker + 'D' diamond marker + 'd' thin_diamond marker + '|' vline marker + '_' hline marker + ================ =============================== + +\end{lstlisting} + +\subsection{Marker combinations} +\typ{In []: plot(x, y, 'ro')} \\ +This plots figure with red colored filled circles.\\ +Similarly other combination of colors and marker can be used. \section{Lists} Initializing @@ -52,7 +93,7 @@ Out[]: [2, 3] In []: lst[1:-1] Out[]: [2, 3, 4] \end{lstlisting} -Appending to lists +\subsection{Appending to lists} \begin{lstlisting} In []: a = [ 6, 7, 8, 9] In []: b = lst + a @@ -63,36 +104,47 @@ In []: lst.append(6) In []: lst Out[]: [ 1, 2, 3, 4, 5, 6] \end{lstlisting} -Iterating over a List +\subsection{Iterating over a List} \begin{lstlisting} -In []: for each in b: # Iterating over the list, element-wise - ....: print b # Print each element +In []: for element in b: # Iterating over the list, element-wise + ....: print element # Print each element ....: \end{lstlisting} -Splitting Strings +\section{Strings} +\subsection{Splitting Strings} \begin{lstlisting} -In [20]: line = '1.2000e-01 7.4252e-01' -In [21]: point = line.split() # Splits the string at the space -Out[21]: ['1.2000e-01', '7.4252e-01'] +In []: greet = ``hello world'' +In []: print greet.split() +Out[]: ['hello', 'world'] +In []: greet = ``hello, world'' +In []: print greet.split(',') +Out[]: ['hello', ' world'] # Note the whitespace before 'world' \end{lstlisting} +A string can be split based on the delimiter specified within quotes. A combination of more than one delimiter can also be used.\\ +\typ{In []: greet.split(', ')}\\ +\typ{Out[]: ['hello', 'world']}\\Note the whitespace is not there anymore. -Plotting from Files +\section{Plotting from Files} +\subsection{Opening, reading and writing files} + +\begin{lstlisting} + In []: f = open('datafile.txt') #By default opens in read mode. If file does not exist then it throws an exception + In []: f = open('datafile.txt','r') #Specifying the read mode + In []: f = open('datafile.txt', 'w') #Opens the file in write mode. If the file already exists, then it deletes all the previous content and opens. +\end{lstlisting} +\subsection{Plotting} \begin{lstlisting} -In [22]: L = [] -In [23]: T = [] - -#Open a file & operate on each line -In [24]: for line in open('pendulum.txt'): - .... point = line.split() - .... L.append(float(point[0])) - .... T.append(float(point[1])) -In [25]: TSq = [] -In [26]: for t in T: - ....: TSq.append(t*t) - ....: - ....: -In [27]: plot(L, TSq, '.') +l = [] +t = [] +for line in open('pendulum.txt'): + point = line.split() + l.append(float(point[0])) + t.append(float(point[1])) +tsq = [] +for time in t: + tsq.append(time*time) +plot(l, tsq, '.') \end{lstlisting} \end{document} |