To show the implementation of the matrix viewer, we'll modify and expand the scenario to have more cities and four different matrices showing a variety of data.

为了演示矩阵查看器的实现，我们将修改并扩展此场景，将有更多的城市，有四个不同的矩阵以显示多个数据。

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Now, in order to express this kind of linear relation, we can use matrices. A matrix is just a table with Numbers in it.

现在，为了说明这种线性关系，我们可以用矩阵，矩阵就是一个含有数字的列表。

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Strang s analysis applies to so-called banded matrices. Most of the Numbers in a banded matrix are zeroes; the only exceptions fall along diagonal bands, at or near the central diagonal of the matrix.

Strang的分析被应用于所谓的带状矩阵上；带状矩阵的绝大多数项都是0；唯一的例外是矩阵中心或靠近矩阵中心的对角带。

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