times, .*

Element-by-element multiplication of fi objects

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Syntax

C = A.*B
C = times(A,B)

Description

example

C = A.*B performs element-by-element multiplication of A and B, and returns the result in C.

C = times(A,B) is an alternate way to execute A.*B.

Examples

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Open Live Script

Use the times function to perform element-by-element multiplication of a fi object and a scalar. 

a=4;
b=fi([2 4 7; 9 0 2])
b=2×3 object
     2     4     7
     9     0     2

          DataTypeMode: Fixed-point: binary point scaling
            Signedness: Signed
            WordLength: 16
        FractionLength: 11

a is a scalar double, and b is a matrix of fi objects. When doing arithmetic between a fi and a double, the double is cast to a fi with the same word length and signedness of the fi, and best-precision fraction length. The result of the operation is a fi. 

c=a.*b
c=2×3 object
     8    16    28
    36     0     8

          DataTypeMode: Fixed-point: binary point scaling
            Signedness: Signed
            WordLength: 32
        FractionLength: 23

During the operation, a was cast to a fi object with wordlength 16. The output, c, is a fi object with word length 32, the sum of the word lengths of the two multiplicands, a and b. This is because the default setting of ProductMode in fimath is FullPrecision.

Open Live Script

Use the times function to perform element-by-element multiplication of two fi objects. 

a=fi([5 9 9; 1 2 -3], 1, 16, 3)
a=2×3 object
     5     9     9
     1     2    -3

          DataTypeMode: Fixed-point: binary point scaling
            Signedness: Signed
            WordLength: 16
        FractionLength: 3


b=fi([2 4 7; 9 0 2], 1, 16, 3)
b=2×3 object
     2     4     7
     9     0     2

          DataTypeMode: Fixed-point: binary point scaling
            Signedness: Signed
            WordLength: 16
        FractionLength: 3


c=a.*b
c=2×3 object
    10    36    63
     9     0    -6

          DataTypeMode: Fixed-point: binary point scaling
            Signedness: Signed
            WordLength: 32
        FractionLength: 6

The word length and fraction length of c are equal to the sums of the word lengths and fraction lengths of a and b. This is because the default setting of ProductMode in fimath is FullPrecision.

Input Arguments

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Input array, specified as a scalar, vector, matrix, or multidimensional array of fi objects or built-in data types. A and B must have the same dimensions unless one is a scalar value.

Data Types: fi |single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Complex Number Support: Yes

Input array, specified as a scalar, vector, matrix, or multidimensional array of fi objects or built-in data types. A and B must have the same dimensions unless one is a scalar value.

Data Types: fi |single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Complex Number Support: Yes

Output Arguments

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Output array, returned as a scalar, vector, matrix, or multidimensional array.

Extended Capabilities

HDL Code Generation
Generate Verilog and VHDL code for FPGA and ASIC designs using HDL Coder™.

See Also

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Introduced before R2006a

Fixed-Point Designer Documentation

Support