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rfacet-grid

facet-grid in ggplot, R

I'm trying to plot categorical data using ggplot in which I have two categories for parameter ( C and C+Fe) that I pass facet-grid argument. here is part of my code:

mediagene<-ggplot(ARG)+
geom_boxplot(aes(x = gene, y= RA, fill=type))+
ylab("Relative gene abundance\n copies/ 16s rRNA")+
theme_bw()+
facet_grid(parameter~.,switch="y")+
scale_fill_manual(values=cols)+
labs(fill="Saturation")

and here is the result: enter image description here

now my question is that how I can have only the top graph ( only category C from the parameter)

Solution

  • One way to do this without adding additional packages is to use the subset() function as in:

    mediagene<-ggplot(subset(ARG, parameter == 'C'))+
geom_boxplot(aes(x = gene, y= RA, fill=type))+
ylab("Relative gene abundance\n copies/ 16s rRNA")+
theme_bw()+
facet_grid(parameter~.,switch="y")+
scale_fill_manual(values=cols)+
labs(fill="Saturation")