I didn't know how else to ask you about your code for WAR in R.

[DustinRoss]

Hi Kris,

In your Lahman_WAR file I am getting an error, it may be because I am still learning R.
When I use this code from lines 17-18 I get the error which I will provide below.

#Connect to your Lahman instance so we can grab some data from the master table
drv <- dbDriver("PostgreSQL")

Error: Couldn't find driver PostgreSQL. Looked in:

• global namespace
• in package called PostgreSQL
• in package called RPostgreSQL

I don't have SQL, do I need it for this code to work? What am I missing?

Best,
Dustin Ross

[keberwein]

Looks like I wrote that some time ago. The code assumes the user's machine is also running a database with the "Lahman" instance. Lines 19-27 pull the master and teams tables from Lahman. If you don't want to install a database, I believe the Lahman data is now available via an R package of the same name.

[DustinRoss]

Thank you for getting back to me so quickly. Apologies for the hassle, I am looking to calculate WAR for my masters project, I would like to use WAR to find the effectiveness of the Tommy John Surgery. However, calculating WAR is complicated and I think it is best to use a reliable source.

I am currently working with the Lahman data in R. Would it be possible to provide the code for how to proceed using the R Lahman package. If not I will try to find a work-around.

It appears the "Master" table was updated/changed to "People" 7 months ago. Also, when I try to download the baseball reference link to R it is a "list" in the environment, not a data frame, is that how it should be?

[DustinRoss]

I was able to do it by downloading the CSV file. But not through the link.