title: Explicit formula used in linear regression
body: <p>I have a list of formulas, and I use <code>lapply</code> and <code>lm</code> to create a list of regression models. However, when I look at the <code>call</code> component of each linear model, instead of seeing the explicit formula, I see the name of the variable I parsed into the linear model. E.g. using the mtcars dataset:</p>
  
  <pre><code>temp_formula_list = list(as.formula(hp~1),as.formula(hp~cyl))
  temp_fm_list = lapply(temp_formula_list, function(x) lm(data = mtcars, formula = x))
  </code></pre>
  
  <p>Then examining the <code>call</code> of <code>temp_fm_list[[2]]</code>:</p>
  
  <pre><code>temp_fm_list[[2]]$call
  </code></pre>
  
  <p>gives</p>
  
  <pre><code>lm(formula = x, data = mtcars)
  </code></pre>
  
  <p>when I would like it to explicitly give</p>
  
  <pre><code>lm(formula = hp~cyl, data = mtcars)
  </code></pre>