How do I convert a matrix into a single row vector?

I have some consisting of natural frequencies and I'm trying to find the multiplicities (repeated) frequencies, I get my results in the form of a matrix:

naturalfreq =

   1.0e+04 *

Columns 1 through 7

    1.0476    1.2232    1.0476    0.2261    0.6500    0.5743    0.5743

Columns 8 through 14

    0.2261    0.0603    0.1118    0.1999    0.1118    0.1724    0.1737

Columns 15 through 18

    0.1724    0.0603    0.0000    0.0000

And then I recycled code I found in another question in the forum where X must be a row vector of the form X = [1 2 3 4...] or the code doesn't work, I tried a bunch of things but none worked, so I ended up building the vector manually by copying from my previous result, how can I convert it ?

   X  = 1.0e+04 * [ 1.0476    1.2232    1.0476    0.2261    0.6500  ...
        0.5743  0.5743    0.2261    0.0603    0.1118    0.1999  ...
        0.1118 0.1724    0.1737    0.1724    0.0603    1.9788e-09  ...
        2.6215e-09 ];
    uniqueX = unique(X);
    countOfX = hist(X,uniqueX);
    indexToRepeatedValue = (countOfX~=1);
    freq_with_m = uniqueX(indexToRepeatedValue)
    m = countOfX(indexToRepeatedValue)
    total_m = numel(m)

[James Tursa]

I'm confused. As displayed above, the variable naturalfreq is a row vector. Why did you need to manually re-enter this data?

[quoroy]

you are totally right, I thought that too but I couldn't figure out why it was not giving me the right result, in this case 6 total duplicate values. I just figured out I just needed to round up the values

X  = round(naturalfreq,6)

and I get the result I want.