<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi all yt-users,<div><br></div><div>I'm running into a simple problem I think, but can't find the correct documentation. </div><div><br></div><div>I want to make a slice plot of dark matter density with velocity vectors overlaid, using Gadget HDF5 data. I have uploaded my script here :</div><div><br></div><div><a href="http://paste.yt-project.org/show/5347/">http://paste.yt-project.org/show/5347/</a></div><div><br></div><div>The slice plot works fine. However, I got an error message for the velocity overlay:</div><div><br></div><div><a href="http://paste.yt-project.org/show/5349/">http://paste.yt-project.org/show/5349/</a></div><div><br></div><div>The bottom line is the following :</div><div><pre style="margin: 0px; padding: 5px 0px; font-family: 'Bitstream Vera Sans Mono', monospace; font-size: 13px; color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">YTFieldNotFound: Could not find field '('all', 'velocity_x')' in snapshot_000.</pre><div><br></div><div>The error is pretty obvious, I think YT is looking for the default field, whereas it should look for a deposit of the dark matter data. Somehow I should specify that yt should look for this deposit, but I don't know how ?</div><div><br></div><div>Thank you by advance for your help,</div><div><br></div><div>Long</div><div><br></div><div>
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