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[programming] minor text changes

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Jan Grewe 2018-11-02 11:08:31 +01:00
parent 772eef46f5
commit 04029ca07b
1 changed files with 7 additions and 7 deletions
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programming/lecture/programming.tex
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@ -1031,7 +1031,7 @@ segment of data of a certain time span (the stimulus was on,
\varcode{x} represent the measured data at the times in \varcode{x} represent the measured data at the times in
\varcode{t}. \varcode{t}.
\item Use logical indexing to select those values that have been \item Use logical indexing to select those values that have been
recorded in the time span form 5--6\,s. recorded in the time span from 5--6\,s.
\end{itemize} \end{itemize}
\end{exercise} \end{exercise}
@ -1095,7 +1095,7 @@ ans =
Generally, a program is executed line by line from top to Generally, a program is executed line by line from top to
bottom. Sometimes this is not the desired behavior, or the other way bottom. Sometimes this is not the desired behavior, or the other way
round, it is needed to skip certain parts or execute others round, it is needed to skip certain parts or execute others
repeatedly. High-level programming languages like \matlab{} offer repeatedly. High-level programming languages such as \matlab{} offer
statements that allow to manipulate the control flow. There are two statements that allow to manipulate the control flow. There are two
major classes of such statements: major classes of such statements:
@ -1120,7 +1120,7 @@ x =
120 120
\end{lstlisting} \end{lstlisting}
This kind of program is fine but it is rather repetitive. The only This kind of program solves the taks but it is rather repetitive. The only
thing that changes is the increasing factor. The repetition of such thing that changes is the increasing factor. The repetition of such
very similar lines of code is bad programming style. This is not only very similar lines of code is bad programming style. This is not only
a matter of taste but there are severe drawbacks to this style: a matter of taste but there are severe drawbacks to this style:
@ -1136,7 +1136,7 @@ a matter of taste but there are severe drawbacks to this style:
repetitions. It is easy to forget a single change. repetitions. It is easy to forget a single change.
\item Readability: repetitive code is terrible to read and to \item Readability: repetitive code is terrible to read and to
understand. (I) one tends to skip repetitions (its the same, understand. (I) one tends to skip repetitions (its the same,
anyways) and misses the essential change. (II), the duplication of anyway) and misses the essential change. (II), the duplication of
code leads to long and hard-to-parse programs. code leads to long and hard-to-parse programs.
\end{enumerate} \end{enumerate}
All imperative programming languages offer a solution: the loop. It is All imperative programming languages offer a solution: the loop. It is
@ -1146,7 +1146,7 @@ used whenever the same commands have to be repeated.
\subsubsection{The \code{for} --- loop} \subsubsection{The \code{for} --- loop}
The most common type of loop is the \codeterm{for-loop}. It The most common type of loop is the \codeterm{for-loop}. It
consists of a \codeterm[Loop!head]{head} and the consists of a \codeterm[Loop!head]{head} and the
\codeterm[Loop!body]{body}. The head defines how often the code of the \codeterm[Loop!body]{body}. The head defines how often the code in the
body is executed. In \matlab{} the head begins with the keyword body is executed. In \matlab{} the head begins with the keyword
\code{for} which is followed by the \codeterm{running variable}. In \code{for} which is followed by the \codeterm{running variable}. In
\matlab{} a for-loop always operates on vectors. With each \matlab{} a for-loop always operates on vectors. With each
@ -1191,7 +1191,7 @@ while x == true % head with a Boolean expression
% execute this code if the expression yields true % execute this code if the expression yields true
end end
\end{lstlisting} \end{lstlisting}
\begin{exercise}{factorialWhileLoop.m}{} \begin{exercise}{factorialWhileLoop.m}{}
Implement the factorial of a number \varcode{n} using a \code{while} Implement the factorial of a number \varcode{n} using a \code{while}
-- loop. -- loop.
@ -1201,7 +1201,7 @@ end
\begin{exercise}{neverendingWhile.m}{} \begin{exercise}{neverendingWhile.m}{}
Implement a \code{while}--loop that is never-ending. Hint: the body Implement a \code{while}--loop that is never-ending. Hint: the body
is executed as long as the Boolean expression in the head is is executed as long as the Boolean expression in the head is
true. You can escape the loop by pressing \keycode{Ctrl+C}. \code{true}. You can escape the loop by pressing \keycode{Ctrl+C}.
\end{exercise} \end{exercise}