In MassDynamics/lfq_processing: Processes Proteomics Files for Quantification.

knitr::opts_chunk$set(fig.cap = NULL, fig.path = params$output_figure)

library(data.table)
library(ggplot2)
library(ggrepel)
library(GGally)
library(umap)
library(FactoMineR)
library(factoextra)
library(corrplot)
library(viridis)
library(ggpubr)
library(Hmisc)
library(plotly)
library(stringr)
library(bit64)

num_files <- expdes[, .N]
run_per_condition <- expdes[, .(countRepMax = .N), by = .(experiment)]
setnames(run_per_condition, "experiment", "condition")

# for fractions, create file name from mqExperiment and Fraction
if (!("file_name" %in% colnames(expdes))){
  expdes$file_name = paste(expdes$experiment, " - ", expdes$Replicate)
}


prot_int_rep <- merge(
  run_per_condition,
  prot_int[Imputed == 0, .(Repcount = .N), by = .(id, condition)],
  by = c("condition")
)
prot_int_rep[, repPC := Repcount/countRepMax]
prot_id_in_a_cond <- prot_int_rep[repPC >= 0.5, unique(id)]
prot_int[, Valid := 0L]
prot_int[id %in% prot_id_in_a_cond, Valid := 1L]
rm(prot_id_in_a_cond, prot_int_rep)

dt <- copy(prot_int[Imputed == 0])

dt[is.na(condition), condition := "Library"]


# Protein groups will always have grouped over fractions
dt <- dt[, .N, by = .(condition, Replicate)]
dt[, Run := str_c(condition, Replicate, sep = " - ")]

p <- ggplot(dt, aes(x = as.factor(Run), y = N, color = condition, label=Replicate)) +
  geom_segment( aes(x=as.factor(Run), xend=as.factor(Run), y=0, yend=N), color="skyblue") +
  geom_point(size=2, alpha=0.9) +
  coord_flip() +
  theme_minimal() +
  scale_x_discrete("Condition - Replicate") +
  scale_y_continuous("# Proteins") +
  theme(axis.text.x = element_text(angle = 90, vjust = 0.2),
        panel.grid.major.y = element_blank(),
        panel.border = element_blank(),
        axis.ticks.y = element_blank()
        ) +
  ggtitle("Proteins - Number of identifications from proteinGroups.txt")

ggplotly(p, tooltip = c("label","y")) %>% config(displayModeBar = T, 
                                               modeBarButtons = list(list('toImage')),
                                               displaylogo = F)