lukepilling / forest_plots

Different ways to create forest plots in R

forest_plots

Different ways to create forest plots in R. In all examples the user will need to look and modify the axis limits/breaks to suit the estimates they are plotting.

Examples using data from our 2022 paper on iron polygenic score associations with haemochromatosis outcomes

Pilling LC, Atkins JL, Melzer D (2022) Genetic modifiers of penetrance to liver endpoints in HFE hemochromatosis: associations in a large community cohort. Hepatology. https://doi.org/10.1002/hep.32575

ggplot2

Link to syntax. Example output:

ggplot2 + grid line colours

Same as above but with 3 differences:

• Alternating coloured horizontal lines added (white and grey)
• Ordered by effect size rather than custom (as appears in file)
• Different "classic" theme to include axis lines and no reference lines

Link to syntax. Example output:

ggplot2 + grid colours + limit axes & add arrows

As above, with one difference:

• Axes can be limited if wide CIs are not desired. Arrows are added to show CIs go beyond limits

Link to syntax. Example output:

ggplot2 + grid colours + limit axes + add estimates

As above, with one difference:

• Write estimates alongisde the forest plots. Remember to modify variable x_maximum_labels if you can't see the estimate text properly.

Link to syntax. Example output:

forest_plots's Issues

error line going beyond arrow for the upper limimt obly

Hi first of all, thank you for your help.
I tried your code, it works for most of the parts except when upper limit is beyond the arrow limit it still draws the line