<p><div><div><div><div data-width="100" data-show-faces="false" data-send="true" data-layout="button_count" data-height="21" data-href="https://www.r-bloggers.com/string-manipulation-exercises/"></div></div><div><a data-url="https://www.r-bloggers.com/string-manipulation-exercises/" data-counturl="https://www.r-bloggers.com/string-manipulation-exercises/" data-count="horizontal" data-text="String Manipulation – Exercises" class="twitter-share-button" data-via="rbloggers" href="https://twitter.com/share"></a></div><div></div></div><div></div></div>
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(This article was first published on <strong><a href="http://r-exercises.com/2016/11/27/string-manipulation-exercises/"> R-exercises</a></strong>, and kindly contributed to <a rel="nofollow" href="https://www.r-bloggers.com/">R-bloggers)</a> </div>
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<p>In this set of exercises we will practice functions that enable us to manipulate strings.You can find more about string manipulation functions in <a target="_blank" rel="nofollow" href="http://gastonsanchez.com/Handling_and_Processing_Strings_in_R.pdf">Handling and Processing Strings in R</a> e-book.</p>
<p>Answers to the exercises are available <a target="_blank" rel="nofollow" href="http://r-exercises.com/2016/11/27/string-manipulation-solutions/">here</a>.</p>
<p>If you have different solution, feel free to post it.</p>
<p>
<strong>Exercise 1</strong>
</p>
<p>Load text from the <a target="_blank" rel="nofollow" href="http://r-exercises.com/wp-content/uploads/2016/11/gambler.txt">file</a> and print it on screen. Text file contains excerpt from novel “Gambler” by Fyodor Dostoyevsky.</p>
<p>
<strong>Exercise 2</strong>
</p>
<p>How many paragraphs is there in the excerpt?</p>
<p>
<strong>Exercise 3</strong>
</p>
<p>How many characters is there in the excerpt</p>
<p>
<strong>Exercise 4</strong>
</p>
<p>Collapse paragraphs into one and display it on the screen (un-list it).</p>
<p>
<strong>Exercise 5</strong>
</p>
<p>Convert the text to uppercase and save it to new file “gambler-upper.txt”.</p>
<p>
<strong>Exercise 6</strong>
</p>
<p>Change all letters ‘a’ and ‘t’ to ‘A’ and ‘T’.</p>
<p>
<strong>Exercise 7</strong>
</p>
<p>Does the text contain word ‘lucky’?</p>
<p>
<strong>Exercise 8</strong>
</p>
<p>How many words are there in the excerpt, assuming that words are sub-strings separated by space or new line character?</p>
<p>
<strong>Exercise 9</strong>
</p>
<p>How many times is word money repeated in the excerpt?</p>
<p>
<strong>Exercise 10</strong>
</p>
<p>Ask the user to input two numbers, divide them and display both numbers and the result on the screen, each of them formatted to 2 decimal places.</p>
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