classUnderlying
Class of parts within quaternion
Description
returns the name of the class of the parts of the quaternion
underlyingClass
= classUnderlying(quat
)quat
.
Examples
Get Underlying Class of Quaternion
A quaternion is a four-part hyper-complex number used in three-dimensional representations. The four parts of the quaternion are of data type single
or double
.
Create two quaternions, one with an underlying data type of single
, and one with an underlying data type of double
. Verify the underlying data types by calling classUnderlying
on the quaternions.
qSingle = quaternion(single([1,2,3,4]))
qSingle = quaternion
1 + 2i + 3j + 4k
classUnderlying(qSingle)
ans = 'single'
qDouble = quaternion([1,2,3,4])
qDouble = quaternion
1 + 2i + 3j + 4k
classUnderlying(qDouble)
ans = 'double'
You can separate quaternions into their parts using the parts
function. Verify the parts of each quaternion are the correct data type. Recall that double
is the default MATLAB® type.
[aS,bS,cS,dS] = parts(qSingle)
aS = single
1
bS = single
2
cS = single
3
dS = single
4
[aD,bD,cD,dD] = parts(qDouble)
aD = 1
bD = 2
cD = 3
dD = 4
Quaternions follow the same implicit casting rules as other data types in MATLAB. That is, a quaternion with underlying data type single
that is combined with a quaternion with underlying data type double
results in a quaternion with underlying data type single
. Multiply qDouble
and qSingle
and verify the resulting underlying data type is single
.
q = qDouble*qSingle; classUnderlying(q)
ans = 'single'
Input Arguments
quat
— Quaternion to investigate
quaternion
object | array of quaternion
objects
Quaternion to investigate, specified as a quaternion
object or an array of quaternion
objects of any dimensionality.
Output Arguments
underlyingClass
— Underlying class of quaternion object
'single'
| 'double'
Underlying class of quaternion, returned as the character vector
'single'
or 'double'
.
Data Types: char
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
Version History
Introduced in R2018b
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