Heat map without the use of `layout` function

Function which draws heat map with box around it and without any legend. The function calls `image` and because of its simplicity it doesn't use `layout` so it can be used inside the `layout` function together with other plots.

boxed_heatmap(
  cor_matrix,
  clrs_list = c("blue", "white", "red"),
  title = "",
  color_title = "black",
  cex_title = 1.3,
  line_title = 0.5,
  margin_add = 1.5,
  box_width = 1
)

Arguments

cor_matrix	Correlation matrix.
clrs_list	A list of colors passed to `graphics::colorRampPalette`. If three colors are given, first corresponds to negative correlation, second to zero correlation and third to positive correlation. Defaults to `c("blue", "white", "red")`.
title	Title for the heat map. Passed to the `graphics::title` function.
color_title	Color of the title. Passed to the `graphics::title` function.
cex_title	Size of the title. Passed to the `graphics::title` function.
line_title	Line at which title is added to the plot. Passed to the `graphics::title` function.
margin_add	Additional size for the margins. `c(0.5,0.5,0.5,0.5)+margin_add` is passed as the `mar` parameter to `graphics::par`. Defaults to 1.5.
box_width	Width of the box around the heat map. Passed to the `graphics::box` function.