Hi Tazkera, You can always get rays and do the integration yourself: ray = ds.ray(p1,p2) dens = ray['density'] where p1 and p2 are tuples of the end points of the ray. If you're using cartesian coordinates then you can also get x, y and z along the ray: x = ray['x'] etc. then the position is just r = np.sqrt(x**2 + y**2 + z**2) and you can use a numpy or scipy integration method. If you're using data from an AMR run you may need to sort the data: tord = ray['t']) dens = ray['dens'][tord] and similarly for other data from the ray. Regards, Jon On Wed, Nov 1, 2017 at 1:17 AM, <yt-users-request@lists.spacepope.org> wrote:

Date: Tue, 31 Oct 2017 17:56:39 -0400 From: tazkera haque <h.tazkera@gmail.com> To: Discussion of the yt analysis package <yt-users@lists.spacepope.org> Subject: [yt-users] Integration of a field along line of sight Message-ID: <CAFj_7zy_P2FrQSf9DMi0-DkXZOOSvdW=poWO_JzZ_cgQD+aCYQ@ mail.gmail.com> Content-Type: text/plain; charset="utf-8"

Dear YT people,

I need to do integration of density field along line of sight. I know the ProjectionPlot function plots the integration of a field along line of sight.

yt.ProjectionPlot(ds, 'z', 'density, center= 'm')

However, I was wondering if it is possible to get the projection as an array (or new field) , so that I can make a ProfilePlot of the integrated field along line of sight and another field ('Mass')

In other words, I want to do the following:

sp = ds.sphere("max", (200, "kpc")) proj = yt.ProfilePlot(sp, 'Integrated_Density_along_Line_Of_Sight', 'Mass)

Thanks Tazkera -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope. org/attachments/20171031/038832cb/attachment-0001.html>

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