R 如何在LaTeX中使用ggplot的符号和颜色作为图形标题？

我在写一篇论文，我在用R来画我的情节。《华尔街日报》的指导方针规定，图的图例必须在图的标题中。所以我想知道这是否可能，以及如何在LaTeX中使用R符号和颜色作为标题

此外，红色圆圈未出现在已编译文档中

在R中绘图

library(ggplot2)

A <- seq(0, 10, by = 1)
B <- seq(0, 20, by = 2)
C <- seq(0, 30, by = 3)

DF <- data.frame(A, B, C)

pdf(
  file = "Figure1.pdf",
  width = 8/2.54,
  height = 5/2.54,
  pointsize = 8
)
ggplot(data = DF) +
  geom_point(aes(x = 0:10, y = A, color = "A", shape = "A")) +
  geom_point(aes(x = 0:10, y = B, color = "B", shape = "B")) +
  geom_point(aes(x = 0:10, y = C, color = "C", shape = "C")) +
  scale_shape_manual(name = "Legend", values = c(0, 1, 2)) +
  scale_color_manual(name = "Legend", values = c("black", "red", "blue"))

dev.off()

---

有什么帮助吗？

我会在LaTeX中找到相应的符号并手动添加颜色。我可以推荐寻找符号。三角形符号如下所示：

相关：

\documentclass[10pt,a4paper, twocolumns]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}

\begin{document}
This is a test\par
%
\begin{figure}[htb]
\centering
\includegraphics{Figure1.pdf}
\caption{I want here the symbols and colors that were used in R}
\label{fig:figure1}
\end{figure}

\end{document}