syntax error: - answer errors in spelling, punctuation, and usage that keep our code
from running
logic error: - answer errors in what we ask R to do, they might run/execute without an
error but they don't do what we actually wanted
saving script must end in - answer.R
how to send a code into command window - answer highlight code
press command + enter
variables - answercreated to store values
what indicates a list? - answerc
example:
d = c(1,2,3,4,6)
names = c("prices", "dates", "times")
what do you use to extract something you have already stored - answersquare bracket
[x]
mean - answermean(p)
median - answermedian(p)
standard deviation - answersd(p)
variance - answervar(p)
unique - answergives you the list of only the unique items, takes out the repeated
numbers
sort - answerputs the numbers in numerical order
how to change working directory - answermisc. --> course data --> open --> run
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