如何在Julia中删除矩阵行 [英] How to delete a row of matrix in julia

问题描述

在matlab中，删除矩阵A的第二行是

In matlab, deleting the 2nd row of matrix A is

A(2，:) = [];

A(2,:) = [];

如何在Julia中删除矩阵行?我尝试使用A(2,:) = [].但我失败了如何解决这个问题?

How to delete a row of matrix in julia? I tried to use A(2,:) = []. but I failed. How to solve this problem?

推荐答案

您不能从矩阵中删除行-Matlab对此具有简单语法的事实有点陷阱，因为您必须使用实际的方法删除一行是为了创建不包含该行的副本，因此我们决定将其明确化，从而具有更透明的性能特征.您可以更改一维数组的大小，例如做push!(v,x)和pop!(v).

You can't delete a row from a matrix – the fact that Matlab has easy syntax for this is a bit of a trap because the actual way you have to delete a row is to create a copy without the row so we decided to make that explicit and thereby have more transparent performance characteristics. You can change the size of 1-dimensional arrays, e.g. doing push!(v,x) and pop!(v).

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