# R Markdown Introduction

# R Markdown

The first time that I used R Markdown was back to 2014 when I was in graduate school. Unfortunately, I haven’t used this as much as I would like to due to the inconvinience with IT in the hospital. I’m slowly trying to use Rstudio more and more as SAS has limited options on some analysis. R markdown is great for documenting R code and math expressions.

This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see http://rmarkdown.rstudio.com.

You can embed an R code chunk like this:

```
summary(cars)
## speed dist
## Min. : 4.0 Min. : 2.00
## 1st Qu.:12.0 1st Qu.: 26.00
## Median :15.0 Median : 36.00
## Mean :15.4 Mean : 42.98
## 3rd Qu.:19.0 3rd Qu.: 56.00
## Max. :25.0 Max. :120.00
fit <- lm(dist ~ speed, data = cars)
fit
##
## Call:
## lm(formula = dist ~ speed, data = cars)
##
## Coefficients:
## (Intercept) speed
## -17.579 3.932
```

# Including Plots

You can also embed plots. See Figure 1 for example:

```
par(mar = c(0, 1, 0, 1))
pie(
c(280, 60, 20),
c('Sky', 'Sunny side of pyramid', 'Shady side of pyramid'),
col = c('#0292D8', '#F7EA39', '#C4B632'),
init.angle = -50, border = NA
)
```

# Including Flow Chart

You can embed a flow chart. See Figure 2 for example:

```
DiagrammeR::grViz("digraph {
graph [layout = dot, rankdir = LR]
# define the global styles of the nodes. We can override these in box if we wish
node [shape = rectangle, style = filled, fillcolor = Linen]
First [label = '1. \n Create \n Github Repository']
Second [label = '2. \n Create R blogdown \n in R Studio']
Third [label= '3. \n Deploy the web \n by Netlify']
# edge definitions with the node IDs
First -> Second -> Third
}", height=150)
```