title: ggforest (survminer) only selected covariates
body: <p>I would like to create a forest plot after Cox survival models. However, I would liketo display only some of the covariates in the graph? Does someone know if it is possible? Maybe using ggforest2?
  Thanks</p>
  
  <pre><code>library(survival)
  library(survminer)
  
  model &lt;- coxph(Surv(time, status) ~ sex + rx + adhere,
                 data = colon )
  ggforest(model)
  
  colon &lt;- within(colon, {
    sex &lt;- factor(sex, labels = c("female", "male"))
    differ &lt;- factor(differ, labels = c("well", "moderate", "poor"))
    extent &lt;- factor(extent, labels = c("submuc.", "muscle", "serosa", "contig."))
  })
  bigmodel &lt;-
    coxph(Surv(time, status) ~ sex + rx + adhere + differ + extent + node4,
          data = colon )
  ggforest(bigmodel)
  </code></pre>