Need help writing an if statement involving vectors (2)

I'm given a vector A, this vector contains five random numbers ranging from 1 to 13. I need to write an if statement to dertermine whether or not these numbers are in numerical order.

(meaning that the max(A) and min(4) have a difference of 4. And there are no repeating numbers.)

So the possibilities of A being "true" to my conditions are:

[13 12 11 10 9] [12 11 10 9 8] [11 10 9 8 7 6] [10 9 8 7 6] [9 8 7 6 5] [8 7 6 5 4] [7 6 5 4 3] [6 5 4 3 2] [5 4 3 2 1]

HOWEVER, here's the tricky part... the numbers in the given vector A can be in any order.

Any help appreciated, thank you!

Answer 1

[KL]

issorted(A)

returns true if they are sorted! check here

[KL]

if you really want to use if statements, sort the vector using sort(), then compare the sorted array with your original array (using if).

[Trevor Zane Simko]

I ended up just using sort() along with some other conditions. Thank you!

Answer 2

[James Tursa]

Looks like homework to me, so I will just point you in the direction of the following functions:

doc diff
doc all