When presenting data on a plot, it is sometimes useful to also show a table with the actual numbers next to the plot. In some cases (e.g., mean profile plots and forest plots), the x-axes or y-axes of the individual plots/tables need to align with each other. There are several methods in combine plots and…
The function geom_text() can be used to annotate on graphs in GGplot2. Geom_text() uses data frames to annotate. Other functions such as annotate() can also be used to annotate in GGplot2. The annotate() function is described in this other post. The dataset The following dataset is used below to illustrate how to annotate on a…
Functions such as annotate() and geom_text() can be used to annotate a graph in GGPLOT2. This article focuses on the annotate() function which uses data passed in as vectors. The geom_text() function, which uses data frames, is covered in another article. The following example is based on the iris dataset which is available in R….
What is a Dummy Data? Dummy data are used to simulate real data. In the absence of real data, dummy data can be used to simulate the results of the study based on some initial assumptions. Software developers use dummy data to develop and test products before deploying the final product in production. Developers may…
“Error: mapping must be created by aes()” is an error you would eventually run into if you frequently use GGPLOT2 to create graphs in R. The last time I ran into this error was when I was creating profile plots using geom_line(). I succeeded to recreate the error using the R codes below. Visit this…
Longitudinal data is data collected repeatedly from the same subjects or objects over a period of time. The data collection times may or may not be fixed. For example, if you collect the fasting blood glucose from two groups of 25 diabetic patients (50 patients in total) every morning for 10 days, you will get…