Renaming values in an array

I have an array obtained by vertcat as follows:

B =

01C1
01C1
01C1
01C1
01C2
01C2
01C2
02C1
02C1
02C2
03C1
03C2
03C2
04C1
04C1
04C1
04C2
04C2
04C2
04C2
05C1
05C1
05C1
05C2
05C2
06C1
06C1
06C2

I want to replace the text with numbers with the following pattern:

01C1=1
01C2=2
02C1=3
02C2=4
03C1=5
04C2=6

and so on.

so my list would begin like:

1
1
1
1
2
2
2
3
3
etc..

Thanks for any help.

[Stephen23]

Should 04C2=6 actually be 03C2=6 ?

[Jason]

Oh yes, sorry you are right

[Stephen23]

+1 for explaining the question clearly, with input and output examples.

Answer 1

[Stephen23]

You can use unique to achieve this:

>> [~,~,ic] = unique(B,'rows')
ic =
   1
   1
   1
   1
   2
   2
   2
   3
   3
   4
   5
...

Note that this method works only if the rows of B occur in the order of the pattern that you specify.

[Guillaume]

If you want to preserve the order of appearance in B in the return values of unique (i.e. a stable sort), you can with:

[~, ~, ic] = unique(B, 'rows', 'stable');

[Jason]

Thankyou