title: R remove quotation mark in column name of the data frame
body: <p>I have SPSS data, which I have to migrate to R. The data is large with 202 columns and thousands of rows</p>
  
  <pre><code>v1 v2    v3     v4 v5
  1  USA   Male   21 Married
  2  INDIA Female 54 Single
  3  CHILE Male   33 Divorced ...and so on...
  </code></pre>
  
  <p>The data file
   contains variable labels  <code>"Identification No", "Country of origin", "Gender", "(Current) Year", "Marital Status - Candidate"</code></p>
  
  <p>I read my data from SPSS with following command</p>
  
  <pre><code>data&lt;-read.spss(file.sav,to.data.frame=TRUE,reencode='utf-8')
  </code></pre>
  
  <p>The column name is read as <code>v1,v2,v3,v4</code> etc, but I want variable labels as my column name in data frame. I used following command to find the variable labels and set it as names </p>
  
  <pre><code>vname&lt;-attr(data,"variable.labels")
  for(i in 1:202){vl[i]&lt;-vname[[i]]}
  names(data)&lt;-vl
  </code></pre>
  
  <p>Now the problem is that I have to address that column like <code>data$"Identification number"</code>, which is not very nice. I want to remove quotation marks around the column names. How can I do that?</p>