To make a blog post in this website, I installed brocks package developed by Brendan Rocks. The introduction of brocks package is available in his blog post.

There are some mikstakes(bugs?) to be fixed when new_post() is executed to generate a new Rmarkdown file. The default front matter is as following:

    ---  
    layout: post  
    title:  new post  
    date: `r Sys.time()`  
    published: true  
    tags: [example1, example2]  
    ---  

I have to change this yaml section as following then the post is available.

    ---  
    layout: post
    title:  new post
    date: `r Sys.Date()`
    categories: example1, example2
    ---

In addition, before the new blog post and article will be published, old _site folder is better to be deleted.