Read from and make new based on positions

I would like to go through a matrix which looks like this:

the numbers stand for ascii values

where there is capital letter means a word ends.

I read this matrix from a file,

Then I would like to make a new matrix where I register where in this matrix I have the capital words.

So far I know to read from a matrix I would need a for loop such as:

for i=size(S)
    %here I would like to make a new matrxi based on the positons of the
    %capital words in S matrix
    if S(i,j)>=65 || S(i,j)<=90
        % here M would form
    end
end

but what I actually would like to make out of the S, which is the matrix read from the file and shown above,

is to make a new matrix, say M, which has registerted where I have capital letters in S.

Then M will look like

M=(4 5

5 7

5 10

2 12)

because for example S(4,5) has 87 which stands for the capital letter W.

Questions in background to think about could be:

how can I read from S and make M?

How can I find the positions and use them making a new matrix. If it helps the attached file contains the matrix.

Answer 1

[Ive J]

Why not this?

G = [0	115	0	0	0	0	0	0	0	0	111	0	0
0	0	110	0	0	0	110	0	0	0	0	82	0
0	0	0	111	0	0	0	111	0	0	0	0	0
0	0	0	0	87	114	0	0	114	0	0	0	0
0	0	0	0	0	0	84	0	0	84	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	0	0	0	0	0	0];

idx = G >= 65 & G <= 90;
[r, c] = find(idx);
M = [r, c]

M = 4×2

4 5 5 7 5 10 2 12

[Nicle Davidson]

Your answer is amazing! Both short and effective!