Combine two matrices together and organize with one value then the other

Question

I am writhing a code in OCTAVE(C++) where I have 2 matrices that I want merge together. I need to have the values from the first matrix to be intersected with the values from the second matrix. I'm struggling to explain this in words, so hopefully my real world data below will help.

matrix_1 = [67.06582, 14.52026,  0.00000, -5.26088, -19.44268, -21.60000]
matrix_2 = [77.79444, -0.00000,  -0.61309, -10.46707, -21.60000, -20.30657]

output = [67.06582, 77.79444, 14.52026, -0.00000, 0.00000, -0.61309.......]

What is the best way to accomplish this?

Suever · Accepted Answer · 2017-01-16T20:51:46.307

0

You can use Octave to simply concatenate the two arrays along the first dimension (using cat) and then reshape the result into a row vector using reshape. Since Octave uses column-major ordering, it will interleave the two vectors in the result

reshape(cat(1, matrix_1, matrix_2), 1, [])

If you instead want to do this in C++, you'll need to provide some more code which gives us more information on the data structures that hold this data.

edited Jan 16 '17 at 20:51

answered Jan 16 '17 at 20:35

Suever

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the data in my real world problem has repeating values and do not come one after the other in numerical order. This method mixed up my values. Good shot at it though\ – Help Me Please Jan 16 '17 at 20:43
@HelpMePlease Well please update your question with realistic data then. – Suever Jan 16 '17 at 20:44
@HelpMePlease Updated with a version that removes duplicates and sorts the output – Suever Jan 16 '17 at 20:49
Thanks for the advice. Updated real world data is now in the question – Help Me Please Jan 16 '17 at 20:51
@HelpMePlease My first solution still yields the exact result you're expecting with that data. – Suever Jan 16 '17 at 20:51
YOU WERE RIGHT!!! I'm sorry I doubted you in. The error was on my side of the board. Thanks alot – Help Me Please Jan 16 '17 at 20:59

Combine two matrices together and organize with one value then the other

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