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Timeline for Replacement in a nested matrix

Current License: CC BY-SA 3.0

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Jan 23, 2016 at 9:02 comment added garej BTW, this Replace[m1, {a_, b_, c_, d_} -> {c, b, a, d}, {2}] also does the job.
Jan 22, 2016 at 11:33 comment added garej @Kuba, I see it, but the OP asked for MapAt. I've made it just for fun :)))
Jan 22, 2016 at 11:32 comment added Kuba You can use Map[Replace[...], m1, {2}] too.
Jan 22, 2016 at 11:28 history answered garej CC BY-SA 3.0