Error loading an average column [closed]

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Error loading an average column [closed]

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#1 by (2 votes)

-1

I changed the NA value by zero, changing it into a character because I could not calculate the mean.

When trying to calculate the average again the following error appeared:

Warning message:
  In mean.default(x = "ECONOMIA INSTITUCIONALISTA") :
argumento não é numérico nem lógico: retornando NA

r

asked by anonymous 27.04.2018 / 03:43

1 answer

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score 2 · Answer 1

# para que os resultados sejam reproduzíveis
set.seed(42)

# gerar os dados
x <- rnorm(10)
x
# [1]  1.37095845 -0.56469817  0.36312841  0.63286260  0.40426832 -0.10612452
# [7]  1.51152200 -0.09465904  2.01842371 -0.06271410

# adicionando NA's para exemplo
x[c(3, 5, 8)] <- NA
x
# [1]  1.3709584 -0.5646982         NA  0.6328626         NA -0.1061245
# [7]  1.5115220         NA  2.0184237 -0.0627141

Using only the mean() function, it recognizes the presence of NA in the vector and then returns a NA :

mean(x)
# [1] NA

Important : Considering NA as zero (0) or NA will change the result. It is important that you know this and then choose the most appropriate method for your goals.

# média considerando NA
mean(x, na.rm = T)
# [1] 0.6857471

# média considerando NA como zero
x[which(is.na(x))] <- 0
mean(x)
# [1] 0.480023