| mergeAnalyzer {analyzer} | R Documentation |
Analyze data for merging
Description
mergeAnalyzer analyzes the data drop after merge
Usage
mergeAnalyzer(x, y, round.digit = 2, ...)
Arguments
x |
left data to merge |
y |
right data to merge |
round.digit |
integer indicating the number of decimal places to be used |
... |
other parameters needs to be passed to merge function |
Details
Prints the summary of data retained after merge and returns the merged data. This function uses data.table (if the package is installed) for faster data merge
Value
Returns merged data with same class as that of input data. Prints summary of data retained after merging. The summary has 6 columns:
Column: Number of rows and union of column names of numeric columns in both the data
x, y: Sum of columns in both table
Merged: Sum of columns in merged data
remainingWRTx: ratio of remaining data in merged data after merging. example - 0.5 means that 50 of inner join). 1.5 means value became 150 duplicates present in data
remainingWRTy: same as above, but for y table
Examples
# Creating two tables to merge
A <- data.frame(id = c("A", "A", "B", "D", "B"),
valA = c(30, 83, 45, 2, 58))
B <- data.frame(id = c("A", "C", "A", "B", "C", "C"),
valB = c(10, 20, 30, 40, 50, 60))
mergeAnalyzer(A, B, allow.cartesian = TRUE, all = FALSE)