Help with use of regular expression

Problem: I have a cell array of strings

TrajLocationCompact(1, 3).locationIdCompact1 

ans = 

    '1 1 1 1 1 32'
    '29 7 1 1 2 2 2 1 1 29'
    '2 1 1 2 1 1 1 1 1 1 1'
    '29 29 29 39 39 29'
    '29 29 37 29 29 29 29'
    '29 3 2 2 1 2 1 1 1 1 1 2'
    '29 3 1 1 2 1 1 2 1 2 1 29'
    '3 1 1 2 1 1 2 1 1 1'
    '29 29 29 29 29 29 29 29 29 1 2 2 16 5 1 1 2 1'
    '29 29'
    '29'

I want to trasform it in this way

    '1 1 1 1 1 32'  -->  1 32
    '29 7 1 1 2 2 2 1 1 29'  --> 29 7 1 2 1 29
    '2 1 1 2 1 1 1 1 1 1 1'  --> 2 1 2 1
    '29 29 29 39 39 29' --> 29 39 29
    '29 29 37 29 29 29 29' --> 29 37 29
    '29 3 2 2 1 2 1 1 1 1 1 2'  --> 29 3 2 1 2 1 2
    '29 3 1 1 2 1 1 2 1 2 1 29' --> 29 3 1 2 1 2 1 29
    '3 1 1 2 1 1 2 1 1 1' --> 3 1 2 1 2 1
    '29 29 29 29 29 29 29 29 29 1 2 2 16 5 1 1 2 1'  --> 29 1 2 16 5 1 2 1
    '29 29' --> 29
    '29' --> 29

Can you help me to find a regular expression that do it?

Answer 1

[Stephen23]

Your example indicate that you want to convert these string numbers to numeric, and then collect the runs of one value together into one element. This is easy using diff:

>> C = {'1 1 1 1 1 32','29 7 1 1 2 2 2 1 1 29'};
>> D = cellfun(@(s)sscanf(s,'%f'),C,'UniformOutput',false);
>> E = cellfun(@(v)v([true;diff(v)~=0]),D,'UniformOutput',false);
>> E{:}
ans =
    1
   32
ans =
   29
    7
    1
    2
    1
   29

[Joseph Cheng]

to expand on Stephen's you can write a function as such

function cellout = mycellfun(cellin)
   numbers = str2num(cellin);
   points = [1 find(diff(numbers)~=0)+1];
   cellout = num2str(numbers(points));
end

and use it on your data

 test = cellfun(@mycellfun,temp,'uniformoutput',false)

[ely may]

I have another doubt: for example,

C = {'674 674 719 618 631 618 631 618 618 631 618 618 674 674'};

using the code I obtain [674;719;618;631;618;631;618;631;618;674]. Now I want to compact the value consecutive that are repeated one more time including them in bracket

[674;719;618;631;618;631;618;631;618;674] --> [674 719 (618 631) 618 674]

How can I do? Have I to use regolar expression?