Selector

The Selector block extracts selected elements of an input vector, matrix or multidimensional array based on specified indices. The extracted signals can be grouped differently than the input signals.

Depending on the value of the parameter Number of input dimensions the table of indexing parameters changes. Each row of the table corresponds to one of the input measurements in Number of input dimensions. An input signal must have no more than a certain number of measurements, specified as Number of input dimensions. For example, if Number of input dimensions equals , then the signal will be interpreted as -dimensional. For example, if the input is expected to be a scalar (one-dimensional) but Number of input dimensions equals 2, the scalar will be treated as two-dimensional. When configuring the Selector block for operations with multidimensional signals, the block icon changes.

Suppose we have an array of numbers U and we want to select a subarray Y of U using some numeric value Idx1 as an index.

Suppose we have an array U:

We want to select a subarray Y of size 8 from U, starting from the element with index Idx1:

This means that we select elements with indices 3 to 10 from U. Thus, Y will contain the following values:

Here Y is a subarray of U starting from the third element and including the next 7 elements after it. Idx1 defines the initial index of the second dimension, and Idx1+7 defines the final index of the second dimension.

Parameters for the first index are given in the parameter group Index 1. The number of parameter groups depends on the number of dimensions (value of parameter Number of input dimensions). The set of parameters for each index is the same, they differ only in the name for programme code (the number at the end of the name means the index number).

C code generation: Yes