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POProperly building a function in R
 

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  1. POProperly building a function in R
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    <p>I'm writing my first function ever (including any other programming language) and I'm a little confused on the proper structure for <code>if</code>, <code>else</code> and <code>ifelse</code>. I've searched a ton of examples, but none are that clear to me. </p> <p>Situation - I'm trying to bucket clients by how long they have been clients for, then turn that into a factor. </p> <pre><code>#Sample Data clientID &lt;- round(runif(2,min=2000, max=3000),0) MonthsSinceSignUp &lt;- round(runif(20,min=1, max=60),0) df &lt;- data.frame(cbind(clientID,MonthsSinceSignUp)) </code></pre> <p>For a given client, I would like to determine if they have been so for less than a year, more than year, but less than 2, etc. </p> <p>This is my first crack at a function:</p> <pre><code>ClientAgeRange &lt;- function(MonthsSinceSignUp) { if (MonthsSinceSignUp &lt; 13) {ClientAgeRange &lt;- '1 year'} } else { if (MonthsSinceSignUp &gt; 13 &amp; MonthsSinceSignUps &lt; 25) {ClientAgeRange &lt;- '2 years'} } else {ClientAgeRage &lt;- '3+ years'} </code></pre> <p>The error that I keep getting is: <code>Error: unexpected '}' in "}"</code>, which would indicate I'm missing or have an extra closing bracket. However, despite my trouble shooting, I can't locate it. But - I think in general, I'm not apply the correct structure to the function. I'm trying to produce a <code>if this, then set this variable as that</code>. How can I structure this function properly?</p> <p>Lastly - if I wanted to add the output of the function to the <code>dataframe</code>, is <code>apply</code> the correct way to do so?</p>
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    1. CONo one seems to have mentioned this minor detail, but all of your clients who signed up 13 months ago will be categorized as '3+ years' unless you change the `> 13` to `>= 13` ;)
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