convert 3D to 2D?

Help me to convert 3d matrix (consider x-y-z plane) to x times 2d matrix (y-z). Then I want to write this output to a file as ...(x1y1z1), (x2y2z2),(x3y3z3) and so on; (xyz)=value of x-y-z position in matrix

[Walter Roberson]

If you have position YourMatrix(J, K, L) where the three indices are not all the same, then where should that go into the output file?

Should the output order be YourMatrix(1, 1, :) then YourMatrix(1, 2, :) ... YourMatrix(1, end, :), YourMatrix(2, 1, :), YourMatrix(2, 2, :), ... and so on?

[lafnath p]

Actually I want to write the 3D array into a file in such a format :first write the 1st X-plane value then 2nd X-plane and so on..(data1,data2,(complete 1st X-plane) then in next line data1,data2(2nd X-plane..)and so on..)

[Walter Roberson]

Should the output order be YourMatrix(1, :, 1) then YourMatrix(1, :, 2) ... YourMatrix(1, :, end), YourMatrix(2, :, 1), YourMatrix(2, :, 2), ... and so on?

Should the output order be YourMatrix(:, 1, 1) then YourMatrix(:, 1, 2) ... YourMatrix(:, end, 1), YourMatrix(:, 2, 1), YourMatrix(:, 2, 2), ... and so on?

Should the output order be YourMatrix(:, 1, 1) then YourMatrix(:, 2, 1) ... YourMatrix(:, end, 1), YourMatrix(:, 1, 2), YourMatrix(:, 2, 2), ... and so on?

[Steven Lord]

To ask a more specific version of Walter's question:

A = reshape(1:24, [2 3 4])

If you were to write A to a file in the way you want to write your real 3-D array, what would the EXACT contents of the file be? Be specific: I want to see exactly how you'd arrange the numbers 1 through 24 in the file and I would like to see whatever else you add beyond just the numbers in A.

[lafnath p]

If X-,Y-,Z-axis is 2, 3, 4 respectively then .I need to write the matrix as:

g(1,1,1),g(1,2,1),g(1,3,1),g(1,1,2),g(1,2,2),g(1,3,2),g(1,1,3),g(1,2,3),g(1,3,3),g(1,1,4),g(1,2,4),g(1,3,4) nextline(Complete one xplane) g(2,1,1),g(2,2,1),g(2,3,1),g(2,1,2),g(2,2,2),g(2,3,2),g(2,1,3),g(2,2,3),g(2,3,3),g(2,1,4),g(2,2,4),g(2,3,4) nextline(2nd xplane..and so on...)

But in actual case x-y-z is very large .

Answer 1

[Walter Roberson]

ps = size(g,2)*size(g,3)
fmt = [repmat('%g,', 1, ps-1), '%g\n'];
fprintf(fmt, permute(g, [2 3 1]));