title: How to omit manipulated variables in stargazer?
body: <p>I want to omit manipulated variables in stargazer. Here manipulated variable mean that I do not have those variables in my data set, such as I introduced a squared term. 
  Below is my code. How can I omit variables like log(fall_t) and log(fall_t)^2. I do have fall_t in my data set.</p>
  
  <pre class="lang-r prettyprint-override"><code>runmtw2_cp_oz11 &lt;- plm(formula = lnyield ~ log(fall_t) + I(log(fall_t)^2) + 
                                   winter_t + wintertsq + 
                                   log(spring_t) + I(log(spring_t)^2) +
                                   log(fall_p) + I(log(fall_p)^2) + 
                                   log(winter_p) + I(log(winter_p)^2) + 
                                   log(spring_p) + I(log(spring_p)^2) + 
                                   ltt + qtt, 
                        data = dfto, effect = c("individual"), 
                        model = c("within"))
  
  
  stargazer(runmtw2_cp_oz11, runmtw2_cp_oz6, runmtw2_cp_oz8, runmtw2_cp_oz10, 
            title = "Panel data with time trend",
            model.names = F, model.numbers = F,
            dep.var.caption = "Yield", dep.var.labels.include = F,
            notes = "*Average and square temperature of Winter are not in log form
            due to negative values.",
            align = T, no.space = T, column.sep.width = "1pt", omit.stat = "f")
  
  </code></pre>