title: PCA Biplot : A way to hide vectors to see all data points clearly
body: <p>I am trying to do PCA with R. </p>
  
  <p>My Data has 10,000 columns and 90 rows
  I used the prcomp function to do PCA.
  Trying to prepare a biplot with the prcomp results, I ran into the problem that the 10,000 plotted vectors cover my datapoints. Is there any option for the biplot to hide the vectors' representation?</p>
  
  <p>OR</p>
  
  <p>I can use <code>plot</code> to get the PCA results. But I am not sure how to label these points according to my datapoints, which are numbered 1 to 90.</p>
  
  <pre><code>Sample&lt;-read.table(file.choose(),header=F,sep="\t")
  
  Sample.scaled&lt;-data.frame(apply(Sample_2XY,2,scale))
  
  Sample_scaled.2&lt;-data.frame(t(na.omit(t(Sample_2XY.scaled))))
  
  pca.Sample&lt;-prcomp(Sample_2XY.scaled.2,retx=TRUE)
  
  pdf("Sample_plot.pdf")
  
  plot(pca.Sample$x)
  
  dev.off()
  </code></pre>