discretize.tests.OrderTest.getError#

OrderTest.getError()[source]#

Compute error defined as a norm of the residual.

This method is overwritten within the test class of a particular operator. Within the method, we define a test function $f$, the analytic solution of an operator $A(f)$ acting on the test function, and the numerical approximation obtained by applying the discretized operator $A_h(f)$. getError is defined to return the norm of the residual as shown below:

$$error(h)=\Vert A_h(f)-A(f)\Vert$$