---
title: "Examples"
output:
  word_document: default
  html_notebook: default
  pdf_document: default
---

In this example we will look at a dataset that might be used with the pair t-test.

# Example of *tibble()* and *tribble()* functions to create a data_frame.

```{r message=FALSE}
library(tidyverse)

BP_narrow <- tibble(
  x = c("a", "b"),
  y = c(1,2),
  z = c(3.6, 8.5)
)

BP_narrow <- tribble(
  ~x, ~y,  ~z,
  "a", 2,  3.6,
  "b", 1,  8.5
)
```


# Example of *spread()* and *gather()*.


```{r}
BP_narrow <- tribble(
  ~subject, ~when, ~spb,
  "BHO", "before", 160,
  "GWB", "before", 120,
  "WJC", "before", 105,
  "BHO", "after", 115,
  "GWB", "after", 135,
  "WJC", "after", 145
)
```

```{r}
BP_wide <- BP_narrow %>% spread(key = when, value = spb)
BP_wide
```

```{r}
BP_narrow <- BP_wide %>% gather(key = when, value = spb, after, before)
BP_narrow
```