How do I cut a vector from the end of a vector of a certain length and keep it in an independent vector

How do I cut a vector from the end of a vector of a certain length and keep it in an independent vector

A=[1 2 3 4 5 6 7 8 9]

result

B=[1 2 3 4 5 6 7]

C=[8 9]

Answer 1

[Chunru]

A=[1 2 3 4 5 6 7 8 9]

A = 1×9

1 2 3 4 5 6 7 8 9

cutpoint = 7;
B=A(1:cutpoint)

B = 1×7

1 2 3 4 5 6 7

C=A(cutpoint+1:end)

C = 1×2

8 9

[reta jon]

Thank you, in case I have the length of the vector that I need to cut and save only. What is the work?

example length of C=2

and length of B=unknown.

cutpoint=unknown.

[Chunru]

Make clear specification of your questions. If possible, give example.

[reta jon]

Thank you sir

clear all;

clc;

A=[1 2 99.5 4 5 6 99.5 99.5 9]

M = length(A)

l=2

cutpoint=A(M-l)

B=A(1:cutpoint)

C=A(cutpoint+1:end)

Warning: Integer operands are required for colon operator when used as index.

Index exceeds the number of array elements (9).

Error in Untitled3 (line 7)

B=A(1:cutpoint)

[Chunru]

a = randn(1000, 1);
% The code below figures out the length
b = a(1:end-25);        
c = a(end-24:end);

[reta jon]

think you so much sir

[Matt J]

@reta jon you should Accept-click @Chunru's answer, since it solved your issue.

[reta jon]

think you sir