Nutrient heatmap — plot_heatmap • thali

Tile heatmap of foods (rows) by nutrients (columns). Selects the top n foods by row sum and applies log1p colour scaling by default.

Usage

plot_heatmap(
  table,
  drop_cols = NULL,
  n = 25L,
  log_scale = TRUE,
  label_fn = .short_label,
  var_label_fn = function(x) x,
  title = NULL
)

Arguments

table: IFCT table name.
drop_cols: Columns to exclude.
n: Number of foods to show (default 25).
log_scale: Apply log1p before colour mapping (default TRUE).
label_fn: Function to shorten food names (rows).
var_label_fn: Function to shorten nutrient names (columns).
title: Plot title.

Value

A ggplot2 object.

Examples

plot_heatmap("polyphenols", n = 25)