Okay. I tried the following:
---
title: "R Notebook"
output: html_notebook
---
some text
```{r}
a <- runif(n = 10)
write.csv(x = a,
file = "temp1.csv")
```
some text
```{r}
b <- rnorm(n = 10)
write.csv(x = b,
file = "temp2.csv")
```
some text
```{bash}
cat temp1.csv temp2.csv > temp.csv
```
some text
```{r}
read.csv(file = "temp.csv")
```
some text
This gave me this .nb.html
file:
Do you expect some other output?
As said earlier, I've no experience on bash
, and hence I'll refrain myself from providing answers based on guesses. I'm sure other people on this community will help you in this problem. Meanwhile, please provide a REPRoducible EXample of your problem for them to help you.