如何在R中的nomnoml圖中添加希臘字母

Question

["

---
title: "Nomnoml Diagram"
output: html_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
library(nomnoml)
```

```{nomnoml, svg=TRUE}
[a]-> \alpha [b]
[c]-> \u03be [d]
```

Answer 1

["

```{nomnoml, svg=TRUE}
[a]->α[b]
```

Answer 2

["

---
title: "Untitled"
output: html_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
library(nomnoml)
```

```{r echo=FALSE}
nomnoml("[a]->\u03B1[b]", svg = TRUE)
```