Simple way to delete a matrix column in Mathematica

﹥>﹥吖頭↗ 提交于 2019-12-01 03:50:07

I think you are looking for:

Drop[Ss,{t},{t}]  

Timings:

ClearAll["Global`*"];

First@Timing[a = RandomInteger[1000, {5000, 5000}];]
0.34

First@Timing[Drop[a, {2}, {2}]]
0.11

While

First@Timing[Transpose@Delete[Transpose@Delete[a, 2], 2]]
0.5
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