Recent content by vinux

  1. vinux

    Time Series Problem

    Cross correlation of nonstationary series is tricky. You will find a high correlation at lag zero itself. What is your objective? Is it prediction? or to understand the causal relationship? Give a short description of the series if possible. It looks like at time 0, there is a...
  2. vinux

    Statistic Task!

    Good attempt. You need to use the t (critical values) instead of Z.
  3. vinux

    Time Series Problem

    The characteristic of the time series variable is important. That will tell that the justification of the deterministic component, like trend seasonality and regime changes. If you don't have any information about the data, the graph suggests nonstationarity ( integrated mostly d=1). Also...
  4. vinux

    What package to install

    You don't need fpp2 package to run ARIMA. fpp2 mainly contains the datasets (discussed in this book, ARIMA can be done with base packages. forecast package will be a help to automate the time series model.
  5. vinux

    Graph of multiple lineal regression

    Are you referring to Multiple Linear regression? If yes, then you must have more than one independent variables.
  6. vinux

    Long-horizon predictive regression

    Do you have independent variable values for the forecasting horizon? If yes, you can use multiple regression.
  7. vinux

    Gambling probability problem

    What have you done on this problem? If it looks difficult, start with when c=0.
  8. vinux

    polynomial regression and interaction

    I am not very clear about f and K. The nonlinearity in the model usually determined by the graphs and residual analysis.
  9. vinux


  10. vinux

    Android app for talkstats

    Quark, Are we having any mobile application for this forum? I have recently seen a mobile app named tapatalk to access few forums. I think it is a good idea to have mobile application for our forum. I think it can be enabled by adding a plugin (eg...
  11. vinux

    [PoSt] Philsophy of Statistics

    Probably I would be the wrong person to start a discussion like philosophy of statistics. Understanding models, programming, and bit of problem solving were my main interest to learn statistics. I never cared about details of the inference or philosophy aspect. I realized that it would be time...
  12. vinux

    What is bad(as of now) about R? or What all items R need revision.

    I know that R is kind of religion for many* of us. I too do marketing job for R in my institute. Few months back I was giving tutorial on R time series and observed few issues with it. Then I dig further on those issues and found those are were known issues. Strange part is, those are in the...
  13. vinux

    installation problem RQDA package

    Hi All, Any of you familiar with RQDA package?. One of my friend working in qualitative research need this package. I tried to install this and I was not able to install one of the dependency ( "gWidgetsRGtk2"). I tried to install this package and got the following error * installing *source*...
  14. vinux


    Hi All, I would like know how many of you are working in Bayesian inference. I considered bayesian is an opportunistic philosophy till few months ago. But now I am interested bayesian and doing some stuff using MCMC magic. I found there a lot of technical problem to discuss in Bayesian...