times, .*
Element-by-element multiplication of fi
objects
Syntax
Description
Examples
Multiply a fi Object by a Scalar
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 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 = 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
.
Multiply Two fi Objects
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 = 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 4 7 9 0 2 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 3
c=a.*b
c = 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
A
— Input array
scalar | vector | matrix | multidimensional array
Input array, specified as a scalar, vector, matrix, or multidimensional
array of fi
objects or built-in data types. Inputs
A
and B
must either be the
same size or have sizes that are compatible. For more information, see Compatible Array Sizes for Basic Operations.
times
does not support fi
objects of data type boolean
.
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
| fi
Complex Number Support: Yes
B
— Input array
scalar | vector | matrix | multidimensional array
Input array, specified as a scalar, vector, matrix, or multidimensional
array of fi
objects or built-in data types. Inputs
A
and B
must either be the
same size or have sizes that are compatible. For more information, see Compatible Array Sizes for Basic Operations.
times
does not support fi
objects of data type boolean
.
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
| fi
Complex Number Support: Yes
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Usage notes and limitations:
Any non-
fi
input must be constant; that is, its value must be known at compile time so that it can be cast to afi
object.When you provide complex inputs to the
times
function inside of a MATLAB Function block, you must declare the input as complex before running the simulation. To do so, go to the Model Explorer and set the Complexity parameter for all known complex inputs toOn
.
HDL Code Generation
Generate VHDL, Verilog and SystemVerilog code for FPGA and ASIC designs using HDL Coder™.
Version History
Introduced before R2006aR2021b: Implicit expansion change affects arguments for operators
Starting in R2021b with the addition of implicit expansion for
fi
times
, plus
, and
minus
, some combinations of arguments for basic operations
that previously returned errors now produce results.
If your code uses element-wise operators and relies on the errors that MATLAB® previously returned for mismatched sizes, particularly within a
try/catch
block, then your code might no longer catch those
errors.
For more information on the required input sizes for basic array operations, see Compatible Array Sizes for Basic Operations.
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