Reorder bars in geom bar ggplot2 by value

Question

I am trying to make a bar-plot where the plot is ordered from the miRNA with the highest value to the miRNA with the lowest  Why does my code not work    gt  head corr m           miRNA         variable value 1    mmu-miR-532-3p      pos     7 2    mmu-miR-1983        pos    75 3    mmu-miR-301a-3p     pos    70 4    mmu-miR-96-5p       pos     5 5    mmu-miR-139-5p      pos    10 6    mmu-miR-5097        pos    47  ggplot corr m  aes x reorder miRNA  value   y value  fill variable        geom bar stat  identity

User · Accepted Answer

Your code works fine  except that the barplot is ordered from low to high  When you want to order the bars from high to low  you will have to add a -sign before value    ggplot corr m  aes x   reorder miRNA  -value   y   value  fill   variable        geom bar stat    identity     which gives       Used data   corr m  lt - structure list miRNA   structure c 5L  2L  3L  6L  1L  4L    Label   c  mmu-miR-139-5p    mmu-miR-1983    mmu-miR-301a-3p    mmu-miR-5097    mmu-miR-532-3p    mmu-miR-96-5p    class    factor                             variable   structure c 1L  1L  1L  1L  1L  1L    Label    pos   class    factor                             value   c 7L  75L  70L  5L  10L  47L                        class    data frame   row names   c  1    2    3    4    5    6

[r] Reorder bars in geom_bar ggplot2 by value

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