convert 3D to 2D?

2016 10 19
1 个回答
更新时间：2016 10 20
6 次查看（30 天）

0 个投票

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

5 个评论
显示 3更早的评论 隐藏 3更早的评论

Walter Roberson
Walter Roberson 2016-10-19
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
lafnath p 2016-10-19
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
Walter Roberson 2016-10-19
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
Steven Lord 2016-10-19
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
lafnath p 2016-10-20
编辑：lafnath p 2016-10-20
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 .

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2016-10-20

0 个投票

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

类别

在 帮助中心 和 File Exchange 中查找有关 Operating on Diagonal Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by