text: user2005: I am trying to combine two datasets to be able to compare the cells in them and using Seurat CCA for it:
  https://satijalab.org/seurat/Seurat_AlignmentTutorial.html
  When I am running AlignSubspace function I am getting a warning for each single dimension that I selected it to be run on:
  seurat_union <- AlignSubspace(object = seurat_union, reduction.type = 
      "cca", grouping.var = "protocol", dims.align = 1:13) 
  
  So, I am getting 13 warnings:
  > warnings()
  Warning messages:
  1: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  2: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  3: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  4: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  5: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  6: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  7: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  8: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  9: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  10: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  11: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  12: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  13: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  
  What is this warning telling me? What should I pay attention to with my datasets?
  
  user2675: I don't have enough reputation to comment so I will briefly answer here
  This warning is fixed in Seurat 2.3.2. Without upgrading you can ignore this message. It doesn't mean anything for the actual analysis performed so your results won't be flawed.
  
original_text: 2005: <p>I am trying to combine two datasets to be able to compare the cells in them and using <code>Seurat</code> <code>CCA</code> for it:</p>
  
  <p><a href="https://satijalab.org/seurat/Seurat_AlignmentTutorial.html" rel="nofollow noreferrer">https://satijalab.org/seurat/Seurat_AlignmentTutorial.html</a></p>
  
  <p>When I am running <code>AlignSubspace</code> function I am getting a warning for each single dimension that I selected it to be run on:</p>
  
  <pre><code>seurat_union &lt;- AlignSubspace(object = seurat_union, reduction.type = 
      "cca", grouping.var = "protocol", dims.align = 1:13) 
  </code></pre>
  
  <p>So, I am getting 13 warnings:</p>
  
  <pre><code>&gt; warnings()
  Warning messages:
  1: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  2: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  3: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  4: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  5: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  6: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  7: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  8: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  9: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  10: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  11: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  12: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  13: In dtw(x = align.1, y = align.2, keep.internals = TRUE,  ... :
  Argument dist.method is only useful with multivariate timeseries
  </code></pre>
  
  <p>What is this warning telling me? What should I pay attention to with my datasets?</p>
   2675: <p>I don't have enough reputation to comment so I will briefly answer here</p>
  
  <p>This warning is fixed in Seurat 2.3.2. Without upgrading you can ignore this message. It doesn't mean anything for the actual analysis performed so your results won't be flawed.</p>
  