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Ranked bar plot of top up/down features from Wilcoxon results

Source: R/statistical_analysis.R
top_features_plot.Rd

Shows the top most upregulated and top most downregulated significant features (by log2 fold change) from wilcox_group_test() as a ranked horizontal bar chart. This scales to features with very long names: each name is drawn once as an axis label rather than needing to be positioned/repelled on a scatter plot, so labels never get dropped or overlap regardless of how many features there are.

Usage

top_features_plot(
  wilcox_results,
  top_n = 10,
  p_threshold = 0.05,
  title = "Top features"
)

Arguments

wilcox_results

Output of wilcox_group_test(). If it contains more than one Comparison, only the first is plotted; subset beforehand to plot a specific comparison.

top_n

Number of top upregulated and top downregulated features to show.

p_threshold

Only features with Adjusted_P_value < p_threshold are considered.

title

Plot title.

Value

A ggplot2 object, or, if no feature passes p_threshold, invisible(NULL) after emitting a message stating this (rather than silently drawing an empty plot).