How can I add three columns and three rows to a defined matrix?

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federica incatasciato 2022-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/1633260-how-can-i-add-three-columns-and-three-rows-to-a-defined-matrix

回答： Image Analyst 2022-1-21

I have a matrix 590x590 and I have to add three intermediate colomuns and three intermediate rows between the first and the second column/row of the original matrix and then other three rows and columns between the third and the fourth and so on. In other words I have to obtain a new matrix whose size is 1770x1770. How can I do it?

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Torsten 2022-1-21

编辑：Torsten 2022-1-21

And the lengths of the inserted rows/columns change from time to time to keep the complete matrix square ?

E.g. the rows/columns that you add in the second step between the third and the fourth row/column of the original matrix (or between the third and the fourth row/column of the matrix you obtained from the first step ?) should already have length 593.

Maybe you should give a small example for clarification.

federica incatasciato 2022-1-21