On 1/17/23 06:42, Wasim Niyaz Munshi ce21d400 wrote:
Hello everyone. I am trying to plot load displacement curves for an elasticity
problem.
For this I need to extract the non-zero elements of my sparse stiffness
matrix. I tried something like system_matrix[I][j] to extract the ij-th entry
but it seems this doesn't work for the SparseMatrix.
Can anyone help me with this?
Wasim -- yes, this is the wrong syntax to extract elements from a sparse
matrix. Fortunately, the documentation of the class offers a number of ways to
access matrix elements:
https://dealii.org/developer/doxygen/deal.II/classSparseMatrix.html
Best
W.
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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