database

  1. M

    Preparing for Meta Analysis

    Hello Everybody, I am a physician and a researcher, have been studying the meta-analysis subject for a while now, and we are in the process to perform a metanalysis in the cardiology field in these days. Here it is a basic summary: although there are a lot of publications trying to...
  2. B

    Syntax error: Error in sqliteExecStatement

    Hi guys, I have the following problem: I am trying to do a multinomial logistic regression on a very large dataset. My dataset has 6 columns (5 independent variables and 1 dependent variable) and 176,483 rows (observations). The function in R which does exactly what I need is...
  3. W

    Merging data in STATA, Panel Data problem. A real challenge!

    Hy! I have one database with companies who did a specific event on a specific date. I also have their company codes. Some of these companies are twice or more in this database because they did this event more then once during the observed period. In my second database I have other company...
  4. G

    Help... new database from a database multiplied for an expansion factor

    how can i creat a new database from a database multiplied for an expansion factor using Stata...?
  5. O

    Detecting duplicates for the first two col and selecting one according to a third col

    I have a database with only three columns but with many thousands of rows. The first and the second columns report numerical ID, and their combination indicate a link (e.g. A-B equal to B-A). Now, I need to delete all rows that are duplicates for the link, selecting the row with the highest...
  6. B

    Could anyone recommend an interactive application for mass data analysis?

    Hi, everybody I need to conduct a large amount of data analysis on database. Could anyone recommend an interactive application for data analysis? The requirements are: 1. Able to cope with the unexpected requirement rapidly. 2. Able to perform further computations on results...