How to find index of non-alternate matrix elements?

i have two matrices say,

clear; close all; clc;
A = [1 3 5 7 9 11 13]; % nx1 matrix
B = [2 4 6 8 10 12 14]; % mx1 matrix
C = [A,B];
C = C';
D = sort(C);

This gives me matrix 'D' with elements from both A and B alternately.

However, if my matrix changes a bit in between like

clear; close all; clc;

A = [1 3 7 9 11 13]; % nx1 matrix
B = [2 4 6 8 10 12 14]; % mx1 matrix
C = [A,B];
C = C';
D = sort(C);

Then my matrix D with not have continuous alternate values from both matrix.

How can i find the index of this discontinuity, each time when the value repeats?

The final matrix D should have continuously increasing values.

[madhan ravi]

upload your desired output , incase if you didn‘t notice both your codes are the same

[Walter Roberson]

Looks to me as if you should be considering

D = reshape([A;B], 1, []);

[Stephen23]

@Walter Roberson: except in the second example A and B have different numbers of elements.

Answer 1

[Andrei Bobrov]

A = [1 3 7 9 11 13];
B = [2 4 6 8 10 12 14];

C = {A(:);B(:)};
M = [cell2mat(C),repelem([1;2],cellfun(@(x)numel(x),C))];
S = sortrows(M,1);
idx_out = find([false;diff(S(:,2))==0]);

[Megha]

@ Andrei Bobrov,

thanks! Your suggetsion really worked for me.

Thnak you for putting effeorts!