Select an Average (
) or
Integral (
) dataset, found under the
More Datasets submenu, to compute the average or integral of another dataset, for example, to plot the average or integral.
Select a Dataset for the data to compute the average or integral. To compute the average or integral for a
Solution dataset, use a
Selection to define the geometric entity (point, boundary, edge, or domain) to integrate over. Right-click the dataset and choose
Selection.
For Integration order, the COMSOL Multiphysics software determines an appropriate integration order for the expression when you use integration. The default is 4. Select the check box to make a different entry in the field (as an integer that is 0 or larger). COMSOL Multiphysics then performs the integration elementwise using numeric quadrature of the selected order.
Select a Geometry level —
From dataset (the default),
Volume,
Surface,
Line, or
Point. The default means the highest geometry dimension for the data in the dataset; typically volumes in 3D, surfaces in 2D, and lines in 1D.
If the dataset represents data for a 1D or 2D axisymmetric geometry, the Compute surface integral (1D axial symmetry) and
Compute volume integral (2D axial symmetry) check boxes are selected by default to compute an average or integral that takes the axial symmetry into account. COMSOL Multiphysics then multiplies the expression (integrand) with
2*pi*r prior to integration to compute the corresponding volume or surface integral.