[petsc-users] Fwd: what is the equivalent DMDAVecRestoreArray() function in petsc4py?

[Matthew Knepley]

On Wed, Feb 14, 2018 at 6:05 PM, HeeHo Park <heeho.park at gmail.com> wrote:

> I just found a user group on PETSc website. Can someone please answer the
> question below?
>

I think it will work using

  with da.getVecArray(U) as u
    for i in range(mstart, mend):
        u[i] = np.sin(np.pi*i*6.*h) + 3.*np.sin(np.pi*i*2.*h)

Does it?

  Thanks,

     Matt

Thanks!
>
> ---------- Forwarded message ----------
> From: HeeHo Park <heeho.park at gmail.com>
> Date: Wed, Feb 14, 2018 at 5:04 PM
> Subject: what is the equivalent DMDAVecRestoreArray() function in petsc4py?
> To: dalcinl at gmail.com
>
>
> Hi Lisandro,
>
> I cannot find DMDAVecRestoreArray() equivalent in petsc4py.
> I'm trying to set a 1D initial condition like this.
>
> def initial_conditions(ts, U, appctx):
>     da = ts.getDM()
>     mstart,xm = da.getCorners()
>     mstart = mstart[0]
>     xm = xm[0]
>     M = da.getSizes()[0]
>     h = 1.0/M
>     mend = mstart + xm
>
>     u = da.getVecArray(U)
>     for i in range(mstart, mend):
>         u[i] = np.sin(np.pi*i*6.*h) + 3.*np.sin(np.pi*i*2.*h)
>
>     da.getVecRestoreArray(u)
>
> Also, is there a better way to ask questions about petsc4py? a forum? or
> google-group?
>
> Thanks,
>
> --
> HeeHo Daniel Park
>
>
>
> --
> HeeHo Daniel Park
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.caam.rice.edu/~mk51/>
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