Create valid names for multiple instruments
An earlier exercise taught you how to use setSymbolLookup() to set a default data source for getSymbols(). You can also use setSymbolLookup() to create a mapping between the instrument symbol and the name of the R object.
This is useful if you want to download data for a lot symbols that are not syntactically valid names, or symbols that have names that conflict with other R variable names.
An example of a name that conflicts is the symbol for AT&T's stock, T, which is often used as a short form for the logical value TRUE.
To change the name of a given symbol, arguments must be passed to setSymbolLookup() as a list, like so: setSymbolLookup(NEW_NAME = list(name = "OLD_NAME")).
Este exercício faz parte do curso
Importing and Managing Financial Data in R
Instruções do exercício
- Set the name for
"BRK-A"to"BRK.A". - Set the name for
"T"(AT&T) to"ATT". - Use one
getSymbols()call to load data for both instruments using the new names you assigned to them.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
# Set name for BRK-A to BRK.A
# Set name for T to ATT
setSymbolLookup(___ = list(name = "___"))
# Load BRK.A and ATT data
getSymbols(c("___", "___"))