Question

If a record data matrix has reduced number of columns after a transformation, the transformation has performed:

Answer 1

Answer:

Dimentionality Reduction

Explanation:

It is simply a definition so it does't need any explanation

Answer 2

The dimensionality reduction denotes the decrease in the columns of a data matrix.

• Matrix means data are arranged in a column and row format.
• With the help of the matrix, it's easy to understand the data and values.
• When a matrix contains data of a larger dimension the system needs to transfer it into a lower dimension.
• Maintaining the same information, the reduction to a lower dimension is the dimensionality reduction.
• Thus the dimensionality reduction performed to decrease the dimension is done by reducing the matrix columns.