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rfunctioncbind

Why a value for an R object appears twice in a cbind output in R?

I was wondering how I could prevent the numeric value of object eta in my R code below from being repeated (as it does now) in the second row of my cbind() output and instead of that an NA be inserted in the second row?

Here is my current cbind output:

          Df   Sum Sq   Mean Sq F value     Pr(>F)       eta
k          2 8.688793 4.3443964 5.47955 0.02038724 0.4773314
Residuals 12 9.514058 0.7928382      NA         NA 0.4773314(This one is repetitive! I want `NA` here)

Here is my R code:

k = gl(3, 5, 15)
y = as.vector(unlist(mapply(FUN = rnorm, n = rep(5, 3), mean = c(4, 5, 6))))
a = anova(aov(y ~ k))
eta = a[, 2][1] / (a[, 2][1] + a[, 2][2])
cbind(a, eta)
Solution

  • Pretty sure eta value is being recycled. You may try cbind(a, eta = c(eta, NA)) to avoid the recycling.