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cowplot-getting some error,how can I fix it ?

hi When I run the library(cowplot), getting some error. what does it mean? please check error below

Note: As of version 1.0.0, cowplot does not change the
  default ggplot2 theme anymore. To recover the previous
  *behavior, execute:
  theme_set(theme_cowplot())
r

1 answer

That's a note rather than an error. In an earlier version of cowplot, when you loaded the package, cowplot set the global ggplot2 theme that was used by the R session (presumably this annoyed a few people). The note just states that it no longer changes the global ggplot2 theme.

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