plot_image.RdCreates ggplot objects of the tissue images when available within the STlist
plot_image(x = NULL, samples = NULL)an STlist
a vector of numbers indicating the ST samples to plot, or their
sample names. If vector of numbers, it follow the order of names(x@counts).
If NULL, the function plots all samples
a list of plots
If the STlist contains tissue images in the @misc slot, the plot_image function
can be used to generate ggplot objects. These ggplot objects can be plotted next to
quilt plots (STplot function) for comparative analysis.