In msperlin/adfeR: Data, exercises and Functions for Book "Analise de Dados Financeiros e Economicos com o R"

my_df <- dplyr::tibble(x = -100:100, 
                       y = x + 5)

# solution
my_df$cumsum_x <- cumsum(my_df$x)

# solution
my_sol <- sum(my_df$cumsum_x > -3500)

my_answers <- make_random_answers(my_sol)

#check_answers(my_answers)

Question

Crie uma nova coluna em my_df chamada cumsum_x, contendo a soma cumulativa de x (função cumsum). Desta nova coluna, quantos valores são maiores que -3500?

#exams::answerlist(my_answers, markup = "markdown")

Solution

Meta-information

extype: num exsolution: r my_sol exname: "dataframe basic 02" exshuffle: TRUE

msperlin/adfeR documentation built on March 26, 2021, 3:05 a.m.