Question about selecting elements in a vektor

Hi

i have a vektor that is 1x7200 long. i want to get the value at index 500 and then the following 1000 values after that index and write them into a Vektor.

As an exemple to make this easier to understand.

a = [780 465 983 125 756 429 143 23 51 47 86 95 47 85 55 44 77 99];

i want to get the value at index 5 wich is 756 and then i want the next 3 values after that and write them in a vektor b.

So b would look like this b = [756 429 143 23 ];

i know that b = a(5) gives me the value 756 but how do i get the other 3 values after that?

Thank you.

Answer 1

[Dyuman Joshi]

Similar to your previous question -

a = [780 465 983 125 756 429 143 23 51 47 86 95 47 85 55 44 77 99];

%Index
idx = 5;
%next values
n=3;

%Get the values of index and the next values - 
b = a(idx:idx+n)

b = 1×4

756 429 143 23

I suggest you to take with the free introductory course MATLAB Onramp tutorial to learn the essentials of MATLAB.

[malik abdelli]

i just got confused because i wrote b = a(idx : 3 ); but it gave me a blank vektor, i forgot that i need to type idx 2 times. but now it works.

Thanks again :)