To do this, use an iterator block to generate the indices required by the Assignment block (or two iterator blocks if you need to compute row and column indices separately). You can use the Assignment block to assign values computed in an iterator (For or While) loop to a vector or matrix signal. Simulink displays an error dialog box if you update or simulate a model that connects a vector signal to either the U1 or U2 port of an Assignment block whose Input type is Matrix. Then U2 must by a 1-by-2 matrix.Īn Assignment block whose Input type is Matrix accepts only matrix signals at its U1 and U2 ports. For example, suppose your row and column index sources specify a single row index and two column indices. When determining the dimensions of U2, count a single row or column index as a vector of size 1 and -1 as equivalent to a vector of indices of the same width as the row or dimension size of U1.

For example, suppose that you specify a vector of row indices of size 2 and a vector of column indices of size 4. To enable all specified elements to be assigned values, U2 must be an N-by- M matrix where N is the width of the row indices vector and M is the width of the column indices vector. It assigns the second element of the first row of U2 to the second specified element of the first specified row of U1, and so on. In particular, the block assigns the first element of the first row of U2 to the first specified element in the first specified row in U1. The block assigns values from U2 to the specified elements of U1 in column-major order. Specifies a set of rows or columns of U1.Specifies a single row or column of U1.Connect an external source of indices to each indices port.Ī row or column indices source can have any of the following values: If you specify the row and/or column index source as External, the block displays an input port labeled R and/or an input port labeled C. Enter the row or column indices of the elements of U1 to be assigned values into the corresponding field. If you specify the row and/or column index source as internal, the block displays a Rows and/or Columns field. You can specify either or both of these parameters as Internal or External. If you specify the Input Type of the Assignment block as Matrix, the block's dialog box displays a Source of row indices parameter and a Source of column indices parameter. To assign values to a matrix signal, set the Input Type parameter to Matrix. The block assigns the first element of U2 to the element of U1 specified by the first index, the second element of U2 to the U1 element specified by the second index, and so on. For example, if the indices vector contains two indices, U2 must be a two-element vector of values. The width of the values signal connected to U2 must be the same as the width of the indices vector. Replaces the specified set of elements of U1 with elements of U2.Assigns a value to the specified element of U1, leaving the values of all the other elements unchanged.Index of a single element specified as a positive integer.Replaces every element of U1 with the corresponding element of U2.The index source can specify any of the following values as indices: Connect an external index source to this port. If you specify External as the source of element indices, the block displays an input port named E.

Use this field to enter the element indices. If you select Internal, the block dialog box displays an Elements field. You can specify the indices source as Internal or External. The block's dialog box displays a Source of element indices parameter. To assign values to a scalar or vector signal, set the block's Input Type parameter to Vector. You can use the block to assign values to scalar, vector, or matrix signals. The block replaces the specified elements of U1 with elements from U2, leaving unassigned elements unchanged, and outputs the result. You specify the values to be assigned to the signal at U1 by connecting a values signal to the Assignment block's U2 port. You can specify the indices of the elements to be assigned values either by entering the indices in the block's dialog box or by connecting an external indices source or sources to the block.

The Assignment block assigns values to specified elements of the signal connected to its U1 port. Assignment (Simulink Reference) Simulink ReferenceĪssign values to specified elements of a signal

Matlab assign vector to matrix