# calculate summation of vectors

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Kha Le on 17 Sep 2021
Commented: Kha Le on 18 Sep 2021
write a code with no loop that will calculate the following sum:
b = 500 + 501^2 + 502 + 503^2 +...+ (N-1)^2 + N, where N = 1000

William Rose on 17 Sep 2021
@Kha Le, This sounds a lot like a homework question. Hints:
Break it into two parts: the sum of the unsquared terms plus the sum of the squared terms.
Read the Matlab help for element-wise power, .^, especially example 1.
Read the Matlab help for sum.
If you still don't know, then show what you have tried that did not work, and show if you got an error message, or you got an answer that you know is the wrong answer, etc.
Kha Le on 18 Sep 2021
thanks for your hint. I figured it out :)

Hernia Baby on 17 Sep 2021
Edited: Hernia Baby on 17 Sep 2021
I'll just write a hint.
Even = 0:2:10
Even = 1×6
0 2 4 6 8 10
Odd = 1:2:10
Odd = 1×5
1 3 5 7 9
Square = (1:10).^2
Square = 1×10
1 4 9 16 25 36 49 64 81 100
Sum = sum(1:10)
Sum = 55
Image Analyst on 17 Sep 2021
If it wasn't tagged as homework, but you really suspect it is homework, you can give hints. You can ask them if it's their homework, and if they say no, then you can go on and give a full solution. If they say yes, I make sure it's tagged as homework (in case they didn't do it themselves) and I give them this link:

Image Analyst on 17 Sep 2021
Hint:
oddTerms = 501 : 2 : N;
evenTerms = 500 : 2 : N;
Kha Le on 18 Sep 2021
thanks for your hint. I figured it out