how to merge tables without any common keywords?

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Taoli Li
Taoli Li 2016-1-18
编辑： Walter Roberson 2024-7-26
I have a 20*20,a 20*1 and a 1*20 tables. I would like add the last two tables into the first one and become a 21*21 table. However all of the three tables are exactly numeric and do not have name for rows and columns and no common keywords.

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回答（1 个）

BhaTTa
BhaTTa 2024-7-26
To add the 20x1 and 1x20 tables to the 20x20 table to create a 21x21 table in MATLAB, you can follow these steps:
  1. Create the initial tables:
  • Let A be your 20x20 table.
  • Let B be your 20x1 column vector.
  • Let C be your 1x20 row vector.
  1. Expand the size of the original table:
  • Initialize a new 21x21 matrix filled with zeros.
  • Place the original 20x20 matrix A into the top-left corner of this new matrix.
  • Add the 20x1 vector B as the last column of the new matrix.
  • Add the 1x20 vector C as the last row of the new matrix.
  • Make sure to place the bottom-right cell of the new matrix appropriately to avoid overwriting.
Here's how you can do this in MATLAB:
% Sample data (replace these with your actual data)
A = rand(20, 20); % 20x20 matrix
B = rand(20, 1); % 20x1 column vector
C = rand(1, 20); % 1x20 row vector
% Initialize a 21x21 matrix with zeros
D = zeros(21, 21);
% Place the 20x20 matrix A into the top-left corner
D(1:20, 1:20) = A;
% Add the 20x1 vector B as the last column (column 21)
D(1:20, 21) = B;
% Add the 1x20 vector C as the last row (row 21)
D(21, 1:20) = C;
% Add the bottom-right cell to complete the matrix (intersection point)
D(21, 21) = 0; % If you want to fill it with a specific value, replace 0 with that value

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