iteration {iteratoR}

Conveniently print loop iterations to console

Description

Place inside a loop to automatically and conveniently print the current loop iteration at exponentially disparate (or custom) intervals.

Usage

iteration(iterator_name, iteration_values)

Arguments

iterator_name

The name of the loop iterator (e.g. "i")

iteration_values

An integer vector specifying loop iterations (defaults to the sequence 1, 2, 5, 10, 20, 50, 100, 200, 500 ....)

Value

iteration() is a non-value-returning function. As such, it will not return anything, and instead print to console the value representing the current loop iteration.

Examples

# For a loop that would otherwise give no feedback as to where it is up to,
# simply include iteration() anywhere inside the loop to show progress

for(i in 1:10000) {
  2 * 2
  iteration()
}
# 10
# 20
# 50
# 100
# 200
# 500
# 1,000
# 2,000
# 5,000
# 10,000
# 20,000
# 50,000



# To use an iterator other than 'i' (example: 'page')
for(page in 1:10000) {
  2 * 2
  iteration("page")
}
# 10
# 20
# 50
# 100
# 200
# 500
# 1,000
# 2,000
# 5,000
# 10,000

# Use custom iteration intervals
for(i in 1:10000) {
  2 * 2
  iteration(iteration_values = seq(0, 1e4, 1e3))
}

# 1,000
# 2,000
# 3,000
# 4,000
# 5,000
# 6,000
# 7,000
# 8,000
# 9,000
# 10,000