R language ggplot2 visual faceting, visual facet_wrap bar plot, using strip Text function customize the size of the strip of each facet title in the facet graph (cutimi

R Language ggplot2 Visual facet （faceting）、 Visual faceted bar graph （facet_wrap bar plot）、 Use strip.text Function to customize the title strip of each facet in the facet graph strip Size (cutomize  size of the strip on facets )

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