title: Split column by deliminter '+' with R
body: <p>For example I got :</p>
  
  <pre><code>V1 &lt;- c("apple + orange + banana","apple+green + orange + banana")
  #careful, there is no space in "apple+green"
  data &lt;- data.frame(V1) 
                               V1
  1       apple + orange + banana
  2 apple+green + orange + banana
  </code></pre>
  
  <p>And I would like this kind of dataframe :</p>
  
  <pre><code>data_final 
  
                V1     V2       V3
      1       apple  orange  banana
      2 apple+green  orange  banana
  </code></pre>
  
  <p>I tried with <em>strsplit</em> :</p>
  
  <pre><code>strsplit(as.character(data$V1), ' +', fixed=TRUE)
  </code></pre>
  
  <p>I added a space because of the string "apple+green". 
  But the result gave me a column composed by a list. 
  And I want a dataframe</p>
  
  <p>Could you please help me?</p>