Can't find the packages current channels, conda

[dokken]

Please search the forum for such questions, as they have been answered before.

Join two interval meshes into one

You can create your mesh with mesh editor, where you can control the number if elements in each region. See: from dolfin import * import numpy mesh = Mesh() editor = MeshEditor() A = 0 B = 0.75 C = 1 N_AB = 10 # Number of cells in AB N_BC = 15 # Number of cells in BC vertices_a = numpy.linspace(A, B, N_AB+1) vertices_b = numpy.linspace(B, C, N_BC+1)[1:] vertices = numpy.hstack([vertices_a, vertices_b]) topological_dim = 1 geometrical_dim = 1 num_local_vertices = N_AB + N_BC + 1 num_l…

Also, if you choose to use legacy dolfin there is plenty of literature on the subject, including:
The fenics book (2012)
and the fenics tutorial (2016)
https://fenicsproject.org/tutorial/