Creating a Table out of a While Loop in R - r

Question

I am trying to make a table from a while loop. Basically, I want to make a while loop where the value of r increases by 1 and repeats this until the inequality is met. But in addition to that, I want to combine these values into a table with three columns: the value of r, the value of w, and the value of rhs (rounded to 3 decimal places).
```{r}
al = 0.10; n = 30; a = 3; b = 5; r = 2; int = 8; h = (int/2); msE = 19.19
table = function(MSE, V, H, alpha = al, r = 2){
rhs = h^2*r/((V-1)*MSE)
w = qf(alpha, V-1, V*(r-1), lower.tail = FALSE)
g = data.frame(r, round(w, 3), round(rhs, 3))
while(w > rhs){
r = r+1
rhs = h^2*r/((V-1)*MSE)
w = qf(alpha, V-1, V*(r-1), lower.tail = FALSE)
g = data.frame(r, round(w, 3), round(rhs, 3))
}
rbind(g)
}
table(MSE = msE, V = a*b, H = h)
```
I figured it would go something like this, but this only prints out the last value of r before the loop ends (it ends at 26), which results in a "table" that only has one row. I would like a table with 24 rows (since it starts at r = 2).
Any help would be appreciated!

Answer 1

Perhaps this might help:
al = 0.10; n = 30; a = 3; b = 5; r = 2; int = 8; h = (int/2); msE = 19.19
table = function(MSE, V, H, alpha = al, r = 2){
rhs = h^2*r/((V-1)*MSE)
w = qf(alpha, V-1, V*(r-1), lower.tail = FALSE)
g = data.frame(r, round(w, 3), round(rhs, 3))
gn = data.frame(r, round(w, 3), round(rhs, 3))
while(w > rhs){
r = r+1
rhs = h^2*r/((V-1)*MSE)
w = qf(alpha, V-1, V*(r-1), lower.tail = FALSE)
g = data.frame(r, round(w, 3), round(rhs, 3))
gn <- rbind(gn,g)
}
return(gn)
}
table(MSE = msE, V = a*b, H = h)

Answer 2

A slightly different approach, eliminating the need for an interim data frame and for rbind(). Commented in the code.
# your parameters
al <- 0.10; n <- 30; a <- 3; b <- 5; int <- 8; h <- (int/2); msE <- 19.19
# your function definition (name changed to avoid confusion / conflict with existing R function)
tabula <- function(MSE, V, H, alpha = al, r = 2)
{
g <- data.frame( N = 0, W = 1, RHS = 0 ) # initiate data frame, values set
# so that the while condition is met
# the while function populates the data frame cell by cell,
# eliminating the need for an interim data.frame and rbind()
while( g[ r - 1, "W" ] > g[ r - 1, "RHS" ] ) # check condition in the last data frame row
{ # write values in a new row
g[ r, "N" ] <- r
g[ r, "W" ] <- round( qf( alpha, V - 1, V * ( r - 1 ), lower.tail = FALSE ), 3 )
g[ r, "RHS" ] <- round( h^2 * r / ( ( V - 1 ) * MSE ), 3 )
r <- r + 1 # increment row counter
}
return( g[ -1, ] ) # return the data frame, removing the initial row
}
tabula( MSE = msE, V = a * b, H = h )