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Chapter 4
Performing Particle Analysis
© National Instruments Corporation
4-9
cwimaqMeasurementNormMomentOfInertiaXY
The normalized moment of inertia in the 
X and Y directions. 
cwimaqMeasurementNormMomentOfInertiaXYY
The normalized moment of inertia in the 
X direction once and the Y direction 
twice. 
cwimaqMeasurementNormMomentOfInertiaYY
The normalized moment of inertia in the 
Y direction twice. 
cwimaqMeasurementNormMomentOfInertiaYYY
The normalized moment of inertia in the 
Y direction three times. 
cwimaqMeasurementNumberOfHoles
Number of holes in the particle. 
cwimaqMeasurementNumberOfHorizSegments
Number of horizontal segments in the 
particle. 
cwimaqMeasurementNumberOfVertSegments
Number of vertical segments in the 
particle. 
cwimaqMeasurementOrientation
The angle of the line that passes through 
the particle Center of Mass about which 
the particle has the lowest moment of 
inertia. 
cwimaqMeasurementParticleAndHolesArea
Percentage of the particle Area in 
relation to its Particle & Holes’ Area. 
cwimaqMeasurementPerimeter
Sum of the perimeters of each hole in the 
particle. 
cwimaqMeasurementRatioOfEquivalentEllipseAxes
Equivalent Ellipse Major Axis divided 
by Equivalent Ellipse Minor Axis. 
cwimaqMeasurementRatioOfEquivalentRectSides
Equivalent Rect Long Side divided by 
Equivalent Rect Short Side. 
cwimaqMeasurementSumX
The sum of all X-coordinates in the 
particle. 
cwimaqMeasurementSumXX
The sum of all X-coordinates squared in 
the particle. 
cwimaqMeasurementSumXXX
The sum of all X-coordinates cubed in 
the particle. 
Table 4-1.  Measurement Types (Continued)
Measurement
Description