R/fct_scatterplot.R

In nf-osi/kairos: kairos: NF Analysis Explorer

##Initial code shamelessly borrowed from the iAtlas Portal
##https://github.com/CRI-iAtlas/shiny-iatlas/blob/09da641f37e7acdc149853a6b818775328054189/functions/scatterplot.R

create_scatterplot <- function(
  df, 
  x_col = "x",
  y_col = "y",
  key_col = NA,
  color_col = NA, 
  label_col = NA,
  xlab = "", 
  ylab = "", 
  title = "", 
  identity_line = FALSE,
  source_name = NULL,
  fill_colors = NA,
  horizontal_line = FALSE,
  horizontal_line_y = NULL) {
  
  if(is.na(key_col)) key_col <- x_col
  if(is.na(color_col)) color_col <- x_col
  if(is.na(label_col)) label_col <- x_col
  
  p <- 
    wrapr::let(
      alias = c(
        X = x_col,
        Y = y_col,
        KEY = key_col,
        COLOR = color_col,
        LABEL = label_col), 
      plotly::plot_ly(
        df,
        x = ~X,
        y = ~Y,
        colors = fill_colors,
        key = ~LABEL,
        source = source_name) %>% 
        add_markers(
          alpha = 0.5,
          hoverinfo = 'text',
          text = ~LABEL,
          textposition = 'top left'
        ))
  
  p <- p %>% 
    layout(
      title = title,
      xaxis = list(title = xlab), 
      yaxis = list(title = ylab)
    )
  
  if (horizontal_line) {
    p <- p %>%
      layout(
        shapes = list(
          type = "line",
          x0 = -1,
          y0 = horizontal_line_y,
          x1 = 1,
          y1 = horizontal_line_y,
          line = list(color = "black", dash = "dot", alpha = 0.5)
        ))
  }
  
  if (identity_line) {
    p %>% 
      layout(
        shapes = list(
          type = "line", 
          x0 = 0, 
          y0 = 0, 
          x1 = 1, 
          y1 = 1, 
          line = list(color = "black", dash = "dot", alpha = 0.5)
        ),
        xaxis = list(range(0, 1)),
        yaxis = list(range(0, 1))
      ) %>% 
      format_plotly()
  } else {
    p %>% 
      format_plotly()
  }
}