Question

我如何能够将病媒的规模缩小到一个较低的层面?

Say for example X:=(1,2,3,4,5,6,7,8,9,10) is a 10-D vector. Suppose I want to reduce it to a 5 dimensional space. Is there any way to do this?

我有这样一种情况,即我需要将N-d矢量与相对较低的病媒进行比较。

Answer 1

将10个病媒转化为5个病媒的途径有限。

比如说,“我希望能发挥两个惯性参数和重新分类的功能,我才能发挥这种作用”。有许多这样的职能。

It really depends on what you want to do with the vector. What are the meanings of your 10d and 5d vectors?

Answer 2

如果我的假设是正确的,则禁止化学武器组织希望将10个数值的矢量转换为包含2个栏的矩阵。

可在R:

# make up the demo data
> v <- c(1,2,3,4,5,6,7,8,9,10)

# modify the dimensions of  v  to have 2 columns
> dim(v) <- c(5,2)

# and check the result
> v
     [,1] [,2]
[1,]    1    6
[2,]    2    7
[3,]    3    8
[4,]    4    9
[5,]    5   10

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