---
title: "slope_rast"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{slope_rast}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

> only for yearly rast

```{r setup}
library(rtrend)
library(terra)

f = system.file("rast/MOD15A2_LAI_China_G050_2001-2020.tif", package = "rtrend")
r = rast(f)
r
time(r)

slp <- slope_rast(r, period = c(2001, 2020),
  outfile = "LAI_trend.tif", overwrite = TRUE,
  fun = rtrend::slope_mk, .progress = "none"
)
slp
```

```{r}
plot(slp)
```

```{r, message=FALSE, echo=FALSE}
file.remove("LAI_trend.tif")
```