excel_ref_functions | R Documentation |
Excel reference functions are used to efficiently lookup values from a data source. The most popular lookup function is "VLOOKUP", which has been implemented in R.
These functions are designed to help users coming from an Excel background. Most functions replicate the behavior of Excel:
Names are similar to Excel function names
Functionality replicates Excel
VLOOKUP(.lookup_values, .data, .lookup_column, .return_column)
.lookup_values |
One or more lookup values. |
.data |
A |
.lookup_column |
The column in |
.return_column |
The column in |
VLOOKUP()
Details
Performs exact matching only. Fuzzy matching is not implemented.
Can only return values from one column only. Use dplyr::left_join()
to perform table joining.
Returns a vector the length of the input lookup values
library(dplyr)
lookup_table <- tibble(
stock = c("META", "AMZN", "NFLX", "GOOG"),
company = c("Facebook", "Amazon", "Netflix", "Google")
)
# --- Basic Usage ---
VLOOKUP("NFLX",
.data = lookup_table,
.lookup_column = stock,
.return_column = company)
# --- Usage with tidyverse ---
# Add company names to the stock data
FANG %>%
mutate(company = VLOOKUP(symbol, lookup_table, stock, company))
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