Aesthetics must either be length one or the same length as the dataProblems

Question

I would like to make a plot with X values as a subset of the measurement and Y-values as another subset of the measured data   In the example as below  I have 4 products p1  p2  p3 and p4  Each are priced according to their skew  color and version  I would like to create a multi-facet plot that depicts the P3 products  Y-axis  vs P1 products  X-axis    My attempt as below has failed miserably with the following error      Error  Aesthetics must either be length one  or the same length as   the dataProblems subset price  product     p1    subset price  product       p3     library ggplot2  product c  p1   p1   p1   p1   p1   p1   p1   p1   p2   p2   p2   p2   p2   p2   p2   p2   p3   p3   p3   p3   p3   p3   p3   p3   p4   p4   p4   p4   p4   p4   p4   p4   skew c  b   b   b   b   a   a   a   a   b   b   b   b   a   a   a   a   b   b   b   b   a   a   a   a   b   b   b   b   a   a   a   a   version c 0 1 0 1 0 2 0 2 0 1 0 1 0 2 0 2 0 1 0 1 0 2 0 2 0 1 0 1 0 2 0 2 0 1 0 1 0 2 0 2 0 1 0 1 0 2 0 2 0 1 0 1 0 2 0 2 0 1 0 1 0 2 0 2  color c  C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   C1   C2   price c 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32  df   data frame product  skew  version  color  price    First plot all the data p1  lt - ggplot df  aes x price  y price  colour factor skew      geom point size 2  shape 19  p1  lt - p1   facet grid version   color  p1   This gavea very good plot  So far so good   Now plot P3 vs P1 p1  lt - ggplot df  aes x subset price  product   p1    y subset price  product   p3    colour factor skew      geom point size 2  shape 19  p1   failed with  Error  Aesthetics must either be length one  or the same length as the dataProblems subset price  product     p1    subset price  product     p3     This is the result I am expecting

User · Answer

It is better to not subset the variables inside aes    and instead transform your data   df1  lt - unstack df form   price product  df1 skew  lt - rep letters 2 1  each   4   p1  lt - ggplot df1  aes x p1  y p3  colour factor skew               geom point size 2  shape 19  p1

User · Answer

The problem is that skew isn t being subsetted in colour factor skew   so it s the wrong length  Since subset skew  product     p1   is the same as subset skew  product     p3     in this case it doesn t matter which subset is used  So you can solve your problem with   p1  lt - ggplot df  aes x subset price  product   p1                         y subset price  product   p3                         colour factor subset skew  product     p1                      geom point size 2  shape 19    Note that most R users would write this as the more concise   p1  lt - ggplot df  aes x price product   p1                         y price product   p3                         colour factor skew product     p1                      geom point size 2  shape 19

User · Answer

I hit this error because I was specifying a label attribute in my geom  geom text  but was specifying a color in the top level aes   df  lt - read table  match-stats tsv   sep   t   library ggplot2     don t do this  ggplot df  aes x V6  y V1  color V1       geom text angle 45  label df V1  size 2    To fix this  I just moved the label attribute out of the geom and into the top level aes   df  lt - read table  match-stats tsv   sep   t   library ggplot2     do this  ggplot df  aes x V6  y V1  color V1  label V1       geom text angle 45  size 2

User · Answer

I encountered this problem because the dataset was filtered wrongly and the resultant data frame was empty  Even the following caused the error to show  ggplot df  aes x  quot  quot   y   y  fill grp    because df was empty

User · Answer

Similar to  joran s answer  Reshape the df so that the prices for each product are in different columns   xx  lt - reshape df  idvar c  skew   version   color                  v names  price   timevar  product   direction  wide     xx will have columns price p1      price p4  so   ggp  lt - ggplot xx aes x price p1  y price p3  color factor skew             geom point shape 19  size 5  ggp   facet grid color version    gives the result from your image

[r] Aesthetics must either be length one, or the same length as the dataProblems

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