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view plotDerivative.jl @ 395:737e597e0e6d refactor/sbp_operators_tests/collect_and_compare

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Rewrite broken tests as testing that the norm is zero
author Jonatan Werpers <jonatan@werpers.com>
date Sun, 04 Oct 2020 19:36:52 +0200
parents 8d505e9bc715
children
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g = sbp.Grid.EquidistantGrid((200,), (0.0,), (2pi,))
op =sbp.readOperator("d2_4th.txt","h_4th.txt")
Laplace = sbp.Laplace(g,1.0,op)

init(x) = cos(x)
v = sbp.Grid.evalOn(g,init)
u = zeros(length(v))

sbp.apply!(Laplace,u,v)

@show u
sbp.Grid.plotgridfunction(g,u)