To do list

[zyz990808]

Hello, everyone! Now I assign the tasks to you:

• [x] @zyz990808 Write all the codes for all the functions. Write the help documents texts words. Run all the examples for every function. And build the website to introduce our package.
• [ ] @aleckmiller Solve the problem of loss function. Build our package. Build a html document to introduce and give examples of our functions.
• [ ] @609731761cs Build the shiny app using our package. Cheers!

[zyz990808]

The problem of loss function has been solved by Yizhong Zhang.