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  • $\begingroup$ Yes, it works fine. Can we extend your Code to do operations on more than 2 columns and more than 2 rows. My example was for illustrative purposes, and in reality I have a matrix of 60 by 60, and need to reduce its dimension to 25 by 25. Thank you for your answer. $\endgroup$ Commented Mar 5, 2019 at 1:27
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    $\begingroup$ @TugrulTemel, I updated f to work with arbitrary number of rows and columns. $\endgroup$ Commented Mar 5, 2019 at 1:54
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    $\begingroup$ @Tugrul, updated f to take lists of lists of rows (and columns) to be combined. $\endgroup$ Commented Mar 6, 2019 at 7:24
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    $\begingroup$ Tugrul, if the row (or column) to be moved is not necessarily one of the rows (columns) that appear in the arguments of f, then it is probably a good idea to post as a new question. If it is, than you can re-shuffle the list of rows (say, {2,3,4}) to be combined so that the target position (say, 4) appears first (that is, use {4,2,3}). Similarly for the list of of columns to be combined. $\endgroup$ Commented Mar 12, 2019 at 22:45
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    $\begingroup$ @Tugrul, for the second case this may be useful. $\endgroup$ Commented Mar 12, 2019 at 23:41