sahuno/barplot-long-labels
claude/skills/barplot-long-labels/SKILL.md
This skill creates publication-quality horizontal barplots with long categorical y-axis labels. Use when user asks to "create a GO enrichment barplot", "make a barplot with pathway names", "plot KEGG results as horizontal bars", "barplot with long y-axis labels", "enrichment figure with proper dimensions", "horizontal barplot that fits all labels", or needs help sizing figures with long text on the y-axis. Automatically calculates optimal width and height based on label length and number of categories. Supports GO, KEGG, Reactome pathway visualization.
development
Updated Apr 15, 2026
$ install --global
skillsauthnpx skillsauth add sahuno/llm_configs barplot-long-labelsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- barplot-long-labels
- description:
- |
- version:
- 1.0.0
- author:
- Samuel Ahuno
Barplot with Long Y-Axis Labels
Create horizontal barplots with automatically calculated dimensions for long categorical labels (GO pathways, KEGG terms, etc.).
Quick Start
source("/data1/greenbab/users/ahunos/apps/llm_configs/claude/skills/barplot-long-labels/calc_barplot_dimensions.R")
dims <- calc_barplot_dimensions(data, y_col = "Description", base_size = 20)
# ... create ggplot ...
ggsave(p, width = dims$width_mm, height = dims$height_mm, units = "mm")
Required Information
Gather from user before creating the plot:
-
Data frame with:
- Y-axis labels column (e.g.,
Description) - Bar values column (e.g.,
p.adjust,count) - (Optional) Grouping column (e.g.,
Direction)
- Y-axis labels column (e.g.,
-
Parameters (defaults in parentheses):
base_size: Font size (20)base_bar_width_mm: Bar area width (180mm)wrap_width: Text wrap limit (50 chars)top_n: Number of items (10)
Implementation
1. Source and Prepare
source("/data1/greenbab/users/ahunos/apps/llm_configs/claude/skills/barplot-long-labels/calc_barplot_dimensions.R")
plot_data <- data %>%
slice_min(p.adjust, n = 10) %>%
mutate(label = str_wrap(Description, width = 50),
label = factor(label, levels = rev(unique(label))))
2. Calculate and Plot
dims <- calc_barplot_dimensions(plot_data, y_col = "label", base_size = 20)
p <- ggplot(plot_data, aes(x = -log10(p.adjust), y = label, fill = Direction)) +
geom_bar(stat = "identity", width = 0.7) +
theme_bw(base_size = 20)
ggsave(p, width = dims$width_mm, height = dims$height_mm, units = "mm")
Key Functions
| Function | Purpose |
|----------|---------|
| calc_barplot_dimensions(data, y_col) | Calculate width & height from data |
| calc_barplot_width(n_chars) | Calculate width from character count |
| calc_barplot_height(n_items) | Calculate height from item count |
| create_barplot_long_labels() | Convenience function for complete plot |
| save_barplot_multiformat() | Save to pdf/png/svg |
Troubleshooting
| Problem | Solution |
|---------|----------|
| Labels cut off | Use calculated dimensions, increase base_bar_width_mm |
| Bars too thin | Increase height or reduce top_n |
| Font issues (Linux) | Don't specify font family, use system default |
Resources
- Dimension tables: See
references/dimension-tables.md - Color palettes: See
references/color-palettes.md - Full example: See
examples/go_enrichment_barplot.R - Detailed docs:
/data1/greenbab/users/ahunos/apps/workflows/RNA-seq_DiffExpr/docs/barplot_width_calculation_guide.md
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