Okay in the past few posts I jumped the gun a little bit. Errors I made include rushing everything, not explaining anything and not giving my blog readers the love and respect they deserve. What am I talking about? Well before we do anythin...
Blog Archives
Breaking it up into trend and seasonal and error components
GDP=scan("/Users/stevensabol/Desktop/R/gdp.csv")Read 258 items> GDP=ts(GDP,start=1,frequency=4)> dlGDP=diff(log(GDP))> plot(stl(log(GDP),"per"))This allows us to do a structural decompositionlog(GDP) = trend + season + error Here is...
Get those plots
Type in the following to get a Q-Q plot and a histogram on top of each otherpar(mfrow=c(2,1))> hist(dlGDP,prob=T,12)> lines(density(dlGDP))> qqnorm(dlGDP)> qqline(dlGDP)the top graph says that the errors are pretty nicely distributed around...
Playing In R: Getting Down to Business
okay so now we are up and plotting. Let's dive into some analysis.First we want to see if we can use the series so we have to see if its covariance stationary and that means that its mean is constant and also we can't be able to predict the e...
Playing Around With R
okay so today we will start playing around with R and will use GDP as our ginny pig.okay so first do the following:1. DOWNLOAD R2. Create a folder and call it "R" on your desktop. Then type ingetwd()this will produce the current place where R fin...
The Dancing Economist’s content will be statistically enhanced.
Recently, I have been fed up. Why? because I wanted to produce professional forecasts on my blog but don't have SAS. I wanted to forecast with some AR, ARMA and ARIMA models, but couldn't. Completely heartbroken. I got to thinking- R co...
Informational Easing: A Change In F.O.M.C. Expectations
Let's analyze the latest FOMC policy move.The FOMC met yesterday and changed up the communications strategy. How so? Well, until yesterday the statement has been saying as of June 22, 2011:"The Committee continues to anticipat...
The Road to Default: Whaa???
Okay so here is what has been happening:The yield curve has been going through a mad flattening- indicating that investors are "flying to safety" and that a recession may be looming around the corner. Why has it been flattening? Well, a string of bad n...
The Road To Default: Still No Agreement
Another day and yet another failed agreement. The u.s. Is in trouble folks. Even if a debt deal is reached there is still widespread consensus that the u.s. will lose its AAA credit rating. More to come later.Keep dancin'Steven J.
A Quick Look At Unemployment
Labor market tightness is defined as the vacancies or job openings rate divided by the unemployment rate. The theory goes that as job openings increase relative to the unemployment rate a tightness is created in that workers get the upper hand in...
Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).
