1_r_to_ojs.qmd

---
title: "OJS"
format:
  html:
    self-contained: true
editor: visual
---

```{r include=F}
# format:html:code-fold: true
```

```{r include=F}
df <- data.frame(
  year = 1961:1990,
  value = runif(30, -10, 20) |> cumsum()
  )

df$updown <- df$value |> diff() |> c(0, "nn" = _) |> sign()

ojs_define(df = df)

```

```{ojs}
//| echo: false


ojs_df = transpose(df)

ojs_df_filtered = ojs_df.filter(function(ojs_df) {
  return ojs_df.year >= yr_filter
})

viewof yr_filter = Inputs.range(
  [1960, 1990], 
  {value: 1970, step: 1, label: "Year filter:"}
)

Plot.plot({
  marks: [
    Plot.line(ojs_df_filtered, {x: "year", y: "value"})
  ]
})
```