title: Show(plot(hc)) returns NULL when using hclust in R
body: <p>I am using VSCode and I am trying to visualize a dendrogram produced by hclust(). My data set (baseMini) is made of 2d vectors and so far this is what I have done:</p>
  <pre><code>dd &lt;- dist(x = baseMini, method = &quot;euclidean&quot;)
  hc &lt;- hclust(d = dd, method = &quot;complete&quot;)
  plot_hc &lt;- plot(x = hc)
  </code></pre>
  <p>I confirmed that dd is a distance matrix, it looks something like this:</p>
  <pre><code>              1          2          3       3000       3001       3002
  2     1.6710624
  3     0.9892719  2.0635176                                            
  3000  6.4243003  7.9459624  5.9004292
  3001  6.3986419  7.9904130  5.9925833  0.8342891
  3002  7.6690587  8.9921632  6.9431019  2.1140049  2.8991615
  6001  7.5003784  5.9874636  7.3277637 12.6488917 12.9759681 12.8943846
  </code></pre>
  <p>Then, trying to check hc I get something like this (I really don't know what to expect as an hclust() output):</p>
  <pre><code>&gt; hc
  
  Call:
  hclust(d = dd, method = &quot;complete&quot;)
  
  Cluster method   : complete
  Distance         : euclidean
  Number of objects: 7
  </code></pre>
  <p>However, when I want to show the plot with show(plot_hc) or even just ask for plot_hc I get a NULL output. Everywhere I looked for they always use these same steps and never mention any particular library or anything else. What am I missing and why can't VSCode/R recognize the plot?</p>
  <p>Additional info:
  I tried asking with plot.hclust(hc) but I get that there is no function &quot;plot.hclust&quot;.
  Another thing that could be is that at the beginning of the file I used the library(ggplot) and I don't know if it interferes somehow with plot(). Also, maybe the error is in how I prepared my data set, but it looks pretty standard:</p>
  <pre><code>&gt; baseMini
               X1        X2
  1     2.1135390 0.3644160
  2     0.4427359 0.3938498
  3     2.2764659 1.3401791
  3000  7.8718230 3.2128892
  3001  8.1685351 2.4331455
  3002  7.9622546 5.3249591
  6001 -4.7765455 3.3279293
  </code></pre>
  <p>Any help is highly appreciated.</p>