Calculate a fibonacci sequence

Takes a sequence length and any two positive numbers in order to produce a fibonacci sequence. The fibonacci sequence is returned as a vector of numbers.

fibonacci(seq_length = 10, first_num = 0, second_num = 1)

Arguments

seq_length	The length of the sequence as a number. The sequence length has to be greater than or equal to 2 (seq_length >= 2). The default is 10.
first_num	The starting point of the sequence. Use any positive number that comes before second_num (first_num < second_num). The default is 0.
second_num	The next number in the sequence after first_num. Use any positive number that comes after first_num (second_num > first_num). The default is 1.

Details

If using the default first and second numbers of 0 and 1 R will return Inf starting at element number 1478.

Examples

# NOT RUN {
fibonacci('eight', 2, -1)  # wrong #1
fibonacci(8, 2, -1)  # wrong #2
fibonacci(8, 2, 1)  # wrong #3
fibonacci(8, 2, 2) # wrong #4
# }
fibonacci(8, 10, 12)  # correct!
#> [1]  10  12  22  34  56  90 146 236
fibonacci(seq_length = 20, first_num = 10, second_num = 15)  # yay!
#>  [1]    10    15    25    40    65   105   170   275   445   720  1165  1885
#> [13]  3050  4935  7985 12920 20905 33825 54730 88555
fibonacci(30)
#>  [1]      0      1      1      2      3      5      8     13     21     34
#> [11]     55     89    144    233    377    610    987   1597   2584   4181
#> [21]   6765  10946  17711  28657  46368  75025 121393 196418 317811 514229
fibonacci()
#>  [1]  0  1  1  2  3  5  8 13 21 34

fibonacci(1500)[1477]
#> [1] 1.306989e+308
fibonacci(1500)[1478]
#> [1] Inf
fibonacci(1500)[1500]
#> [1] Inf