---
title: example for u-ctags
---
# S1

```{r xyX}

x <- 1
foo <- function () {
    y <- 2
    return(y)
}

X <- func()

```

# S2

```{r, cache = TRUE, dependson = "xyX"}
mean(X)
```

```{python}
def f():
   g()
   return 3
```
# S3

