view small_rna_map.r @ 2:7feee0446c5c draft

planemo upload for repository https://github.com/ARTbio/tools-artbio/tree/master/tools/small_rna_map commit 339b809565195d32271f5d17c689dee15063e477

library(optparse)
library(ggplot2)
library(gridExtra)
library(RColorBrewer)
library(gtable)
library(grid)
 
option_list <- list(
    make_option(c("-r", "--output_tab"), type="character", help="path to tabular file"),
    make_option("--output_pdf", type = "character", help="path to the pdf file with plot")
    )
 
parser <- OptionParser(usage = "%prog [options] file", option_list = option_list)
args = parse_args(parser)
 
theme_set(theme_bw()) #a theme with a white background
Table = read.delim(args$output_tab, header=T, row.names=NULL)
Table <- within(Table, Nbr_reads[Polarity=="R"] <- (Nbr_reads[Polarity=="R"]*-1))
 
#To assign colors to categorical variables in ggplot2 that have stable mapping
myColors <- brewer.pal(3,"Set1")
names(myColors) <- levels(Table$Polarity)
colScale <- scale_colour_manual(name = "Polarity",values = myColors)
 
#Make initial figures
p <- ggplot(Table, aes(x=Coordinate, y=Nbr_reads, colour=Polarity)) +
  colScale+
  geom_segment(aes(y = 0, x = Coordinate, yend = Nbr_reads, xend = Coordinate, color=Polarity), alpha=1) +
  geom_segment(aes(y = Nbr_reads, x = 0, yend=Nbr_reads, xend=Chrom_length), alpha=0)+
  facet_wrap(Dataset~Chromosome, scales="free", nrow=1, labeller = label_wrap_gen(multi_line = FALSE))+
  scale_y_continuous(breaks = function(x) round(pretty(seq(-(max(x) + 1), (max(x) + 1)))))+#to display only integer values on y axis
  geom_hline(yintercept=0, size=0.3)+
  theme(strip.text = element_text(size = 6, lineheight = 0.1), #specify strip size
        panel.grid.major = element_line(colour = "#ffffff"),#conceal major grid lines
        panel.grid.minor = element_line(colour = "#ffffff"),#conceal minor grid lines
        axis.title = element_blank(),# Conceal axis titles
        axis.text = element_text(size = 6),#modify the size of tick labels along axes
        legend.position = "none") # Hide the repeate caption

# Create legend
mylegend <- legendGrob(c("F", "R", "Median", "Mean"), pch=22,
                     gp=gpar(col = c("red","blue","black","yellow"), fill = c("red","blue","black","yellow")))
 
# The second plot
cols<- c("Median"="#000000", "Mean"="#fffa00")
p2 <- ggplot(Table, aes(x = Coordinate, group=1)) +
  geom_point(aes(y=Median, colour="Median"), alpha=1, size = 1) +
  geom_point(aes(y=Mean, colour="Mean"), alpha= 0.5, size = 1.2)+
  scale_colour_manual(name="", values=cols)+ 
  expand_limits(y = seq(0,max(Table$Median),by=5)) +
  facet_wrap(Dataset~Chromosome, scales="free", nrow=1, labeller = label_wrap_gen(multi_line = FALSE))+
  geom_segment(aes(y = Nbr_reads, x = 0, yend=Nbr_reads, xend=Chrom_length), alpha=0)+
  scale_y_continuous(limits = c(0,max(Table$Median)), position = "left")+
  theme(strip.background = element_blank(),
        strip.text.x = element_blank(),
        panel.background = element_rect(fill = NA),
        panel.grid.major = element_blank(),
        panel.grid.minor = element_blank(),
        panel.border = element_rect(fill = NA, colour = "grey50"),
        axis.text = element_text(size = 6),
        axis.title = element_blank(),
        legend.position = "none")

# Transforme ggplot graphs on list of graphs
plot.list1 <- by(data     = Table,
                INDICES  = c(Table$Chromosome),
                simplify = TRUE,
                FUN      = function(x) {
                  p %+% x 
                })
 
plot.list2 <- by(data     = Table,
                INDICES  = c(Table$Chromosome),
                simplify = TRUE,
                FUN      = function(x) {
                  p2 %+% x 
                })
 
# Plotting in multiple pages with different rows
multi.plot<-do.call(marrangeGrob,list(grobs=rbind(plot.list1,plot.list2),ncol=1,nrow=8,top=NULL, 
            bottom="Coordinates(nt)", left="Number of reads / Median & Mean", right= mylegend))
ggsave(args$output_pdf, device="pdf", plot=multi.plot, height=11.69, width=8.2)