R markdown: Reduce the space between two plots in pdf output document - r

Question

Aim: R markdown: To construct one DinA4 pdf page with a rectangle on the top left side and two plots.
Problem: After drawing the rectangle, the next plot is far away with a large white space in between.
Desired Output: Heatmap should appear immediately after the rectangle may with one or two white lines.
I guess the problem is the drawing of the rectangle. Here I need some help. Thank you.
---
output:
pdf_document
documentclass: article
classoption: a4paper
geometry: margin=1cm
subparagraph: yes
header-includes: |
\usepackage{titlesec}
\titlespacing{\title}{0pt}{\parskip}{-\parskip}
title: "Example of Title to Body Text"
subtitle: Subtitle Places Here
---
\vspace{-5truemm}
\pagenumbering{gobble}
#``` {r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
library(draw)
library(ggplot2)
library(dplyr)
# ```
#```{r rectangle}
drawBox(x =2, y = 3.5, width = 2.5, height = 1)
#```
#```{r heatmap}
df <- data.frame(
test_id = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4),
test_nr = c(1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5,
1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 2, 2, 2, 2),
region = c("A", "B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D", "A",
"B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D", "A", "B",
"C", "D", "A", "B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D"),
test_value = c(3, 1, 2, 2, 2, 1, 2, 2, 3, 2, 2, 3, 2, 1, 2, 2, 1, 2, 3,
4, 2, 1, 1, 2, 1, 1, 1, 1, 2, 2, 3, 2, 2, 2, 99, 99, 3, 3, 3, 3)
)
# named vector for heatmap
cols <- c("1" = "green",
"2" = "darkgreen",
"3" = "orange",
"4" = "red",
"99" = "black")
labels_legend <- c("1" = "very good",
"2" = "good",
"3" = "not so good",
"4" = "bad",
"99" = "NA")
df <- df %>%
filter(test_id==1)
ggplot(
df,
aes(region, test_nr)) +
geom_tile(aes(fill= factor (test_value))) +
geom_text(aes(label = test_value), size = 10, color = "white") + # text in tiles
scale_colour_manual(
values = cols,
breaks = c("1", "2", "3", "4", "99"),
labels = labels_legend,
aesthetics = c("colour", "fill")
) +
theme(text = element_text(size = 14)) + # this will change all text size
labs(title = "Test (Individual heatmap)", x = "Region", y = "Event") +
labs(fill = "Test") +
coord_fixed(ratio=1, clip="on") +
theme(axis.text.y = element_text(face = "bold", size = 12)) +
theme(axis.text.x = element_text(angle = 0, face = "bold", size = 12)) +
theme(axis.line = element_line(colour = "darkblue",
size = 1, linetype = "solid")
)
# ```
## Information

Answer 1

You can use the subfigure environment to display multiple plots side by side, though you may not want to place the rectangle under the same main caption as the heatmap.
---
output:
pdf_document:
extra_dependencies: "subfig"
documentclass: article
classoption: a4paper
geometry: margin=1cm
subparagraph: yes
header-includes: |
\usepackage{titlesec}
\titlespacing{\title}{0pt}{\parskip}{-\parskip}
title: "Example of Title to Body Text"
subtitle: Subtitle Places Here
---
\vspace{-5truemm}
\pagenumbering{gobble}
``` {r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
library(draw)
library(ggplot2)
library(dplyr)
```
```{r rectangle}
drawBox(x =2, y = 3.5, width = 2.5, height = 1)
```
```{r heatmap-data}
df <- data.frame(
test_id = c(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4),
test_nr = c(1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5,
1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 2, 2, 2, 2),
region = c("A", "B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D", "A",
"B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D", "A", "B",
"C", "D", "A", "B", "C", "D", "A", "B", "C", "D", "A", "B", "C", "D"),
test_value = c(3, 1, 2, 2, 2, 1, 2, 2, 3, 2, 2, 3, 2, 1, 2, 2, 1, 2, 3,
4, 2, 1, 1, 2, 1, 1, 1, 1, 2, 2, 3, 2, 2, 2, 99, 99, 3, 3, 3, 3)
)
# named vector for heatmap
cols <- c("1" = "green",
"2" = "darkgreen",
"3" = "orange",
"4" = "red",
"99" = "black")
labels_legend <- c("1" = "very good",
"2" = "good",
"3" = "not so good",
"4" = "bad",
"99" = "NA")
df <- df %>%
filter(test_id==1)
```
```{r heatmap, fig.show="hold", fig.cap='Rectangle and Heatmap', fig.subcap=c('LEFT', 'RIGHT'), out.width='50%', fig.align = "center"}
drawBox(x =2, y = 3.5, width = 2.5, height = 1)
ggplot(
df,
aes(region, test_nr)
) +
geom_tile(aes(fill= factor (test_value))) +
geom_text(aes(label = test_value), size = 10, color = "white") + # text in tiles
scale_colour_manual(
values = cols,
breaks = c("1", "2", "3", "4", "99"),
labels = labels_legend,
aesthetics = c("colour", "fill")
) +
theme(text = element_text(size = 14)) + # this will change all text size
labs(title = "Test (Individual heatmap)", x = "Region", y = "Event") +
labs(fill = "Test") +
coord_fixed(ratio=1, clip="on") +
theme(axis.text.y = element_text(face = "bold", size = 12)) +
theme(axis.text.x = element_text(angle = 0, face = "bold", size = 12)) +
theme(
axis.line = element_line(
colour = "darkblue",
size = 1, linetype = "solid"
)
)
```
## Information