use Fama-French market and risk-free rate 
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We could use the excess market risk premium and risk-free rate
from Prof. French's factor time series

 Example #1:>showffMonthly()
                DATE MKT_RF    SMB     HML     RF
            1 1926-07-01 0.0296 -0.023 -0.0287 0.0022
            2 1926-08-01 0.0264 -0.014  0.0419 0.0025
            > showffMonthly(-2)
                   DATE MKT_RF     SMB     HML    RF
           1078 2016-04-01 0.0091  0.0084  0.0312 1e-04
           1079 2016-05-01 0.0178 -0.0028 -0.0185 1e-04

 Example #2: get daily data and save it
           > x=showffDaily(0)
           > saveYan(x,"c:/temp/ffDaily.csv")
            [1] "Your saved file is ==>c:/temp/ffDaily.csv"

 Example #3: get monthly data and save it
           > x=showffMonthly(0)
           > saveYan(x,"c:/temp/ffMonthly.csv")
            [1] "Your saved file is ==>c:/temp/ffMonthly.csv"

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Compare two schools research 
///////////////////////////////////////////////////////
Use gs2schools.pickle

> .sw('google scho')
   ID                     NAME                                                                                  WEBSITE
1 173 google scholar 2 schools http://datayyy.com/data_pickle/gs2schools.pickle                                        
2 174 google scholar 2 schools http://datayyy.com/data_excel/gs2schools.xlsx                          
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help students debug their code when teaching
///////////////////////////
 This is new method to help students to debug their programs 
    during lectures. If you have an issue, do the following steps. 
  
  Step 1: Search for the zoom meeting link by issuing the following code:
           .sw('zoom')
           Assume that we have the following results
             ID           NAME                                                                    WEBSITE
           1  9 zoom lecture   https://geneseo.zoom.us/j/88404268306?pwd=VE8vc3BMMThFSU1CNEoxRzJ4K05wUT09
           2 10 zoom lecture 2 http://datayyy.com/zoom.html                                              
           3 11 zoom lecture 3 http://datayyy.com/rpy/zoomLecture.txt    

          To launch the zoom meeting, just enter the ID
            .sw(9)

  Step 2: Mute your microphone
  Step 3: Share your screen
  Step 4: Raise your hand and ask me to check your code

  Step 5: After done, unshare your screen

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