#
Data of Time and Space

Time and Space are difficult concept in phisics.

By the way, in
Data Physics
, it relates to the roots to write data of time and space

There are
Time Series Analysis
and
Recurrent Neural Network (RNN)
to treat time.
But there are not many studies.

##
To Write Time and Space

There are two ways.

###
Use Axis

One is data set of points.
Directions and time become axises.

###
Use Sequences of Data

The other is the sequences for eash direction of the data mean each axis.
Tablation or matrix is used.

Tensor is one of the second way.
It is the ideal way to treat time and space.
But low dimension analysis is simpler.

Convolutional Neural Network (CNN)
is an application of this way for graphical data.

NEXT High dimensional data