OLS estimations

Hi dude, I think our target is wrong. In other word, we should not aim at match the true values. The reason is that we can't derive the exact true values from data. For example, if there are only 3 values of beta, there is no way that we can estimate the beta correctly. Because, our way is the Bayesian way of doing OLS. Instead of matching the true values, the OLS estimations should be matched. 

What I have added to the code:

1. I added the OLS estimations.
2. Instead of plot the true values in abline. I plot the OLS estimations.

Result:
Right now, they mixed very well.