row that increases more every element

Hello,

I was wondering how I would make an array that increases more every element

for example:

given lets say n=randi([10 20], 1);

how would i have vect1 = 9, 16, 25, 36, ... n: so bascially increasing by +2 every element starting at 9

[KSSV]

Your limit of numbers is [10,20] how you expect 25, 36 .. ?

[Walter Roberson]

Your example increases by 9 each time, not by 2?

Are you wanting to start with the fixed value 9 and use the random number to determine the number of terms??

[RozuSolo]

it increases 7 then 9 then 11 then 13 ect.. so starting at 9 increases by 7 + 2* (what ever element you are on - 1)

Answer 1

[RozuSolo]

nvm I got it.. It's just two vectors multiplied to each other [3, n] .* [3, n] so each element is 3x3 4x4 5x5 6x6 ect...

Answer 2

[DGM]

Here's my guess:

A = randi([10 20], 1,10)

A = 1×10

11 18 15 16 19 13 12 12 12 15

B = cumsum(A) % cumulative sum of A

B = 1×10

11 29 44 60 79 92 104 116 128 143