How to extract data frame columns stored in a list in R - Suppose we have two frames each having 5 columns that are stored in a list in R and the data that belongs to same columns has some kind of inherent relationship or we want to check whether there e
I get a lot of questions on how to calculate WAR in the Lahman database. In the past I’ve discussed ways to calculate wOBA and FIP in Lahman but WAR has always been difficult due to the “closed-source” nature of the calculation. But there is an answer
Let’s set up our experiment. The data is a larger version of the problem from“Let’s Have Some Sympathy For The Part-time R User”. We have expanded the number of subjects to 100000 and added 1000 irrelevant columns to the example. We define a new function that usesdplyrandSparklyrto...
summarize()- reduce one or more columns down to a single number. arrange()- reorder the rows of data. These actions can be preceded by agroup_by(), which causes them to be applied individually to grouped rows of data. Moreover, many SQL concepts, such asdistinct(),count(), and joins...
The specific columns which did contain the NaN values, had them because they been placed there logically.extracat::visna(year_data)Almost all of the data that is missing belongs to the columns related to either Delay or Cancellations. This is expected as flights which are cancelled have no ...
tdf$expr <-reorder(tdf$expr, tdf$mtime) WVPlots::ScatterBoxPlotH(tdf,"time","expr",pt_alpha=0.2,title="Execution times in NS") Notice the times where we have not pre-narrowed the table are indeed much slower. The advice is confirmed: narrow to the columns of interest early in your...
Currently, the data is in a tidy format where all symbols are in a separate row. In order to use them in prophet (and in future packages), I need to have the data in a format where each row is a date and all of the symbols are separate columns. Additionally, to be used in ...