Inspecting and visualizing gaps/blanks and structure in large dataframes

Question

I have a large dataframe (400000 x 50) that I want to visually inspect for structure and blanks/gaps.

Is there an existing library or ggplot2 function, that can spit

Answer 1

Assuming that the blank/gaps you are talking about are missing values (NA)

image(t(as.matrix(is.na(df))))