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Adding cognostics

Let's practice custom cognostics by taking the by_symbol data merged with the stock metadata creating a cognostic for the log market capitalization.

Cet exercice fait partie du cours

Visualizing Big Data with Trelliscope in R

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Instructions

  • Use mutate() to create a new variable, market_cap_log, which is the base 10 logarithm of market_cap.
  • Use the cog() wrapper function to provide a custom description for the cognostic, "log base 10 market capitalization".

Exercice interactif pratique

Essayez cet exercice en complétant cet exemple de code.

library(trelliscopejs)
library(dplyr)

# Create market_cap_log
by_symbol <- mutate(by_symbol,
  ___ = cog(
    val = ___(___),
    ___ = "log base 10 market capitalization"
  )
)
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