<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<style type="text/css" style="display:none;"><!-- P {margin-top:0;margin-bottom:0;} --></style>
</head>
<body dir="ltr">
<div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;background-color:#FFFFFF;font-family:Calibri,Arial,Helvetica,sans-serif;">
<p>Hello,<br>
</p>
<p><br>
</p>
<p>I am getting an error when I am trying to run examples given in darkskysims/darksky_tour.</p>
<p>The examples uses yt to load the data. The script looks like this :</p>
<p><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><!--StartFragment-->import sys</p>
<p style="margin-left: 0px; margin-right: 0px;">import matplotlib; matplotlib.use('Agg')</p>
<p style="margin-left: 0px; margin-right: 0px;">from dark_loader import load_halo, prefix</p>
<p style="margin-left: 0px; margin-right: 0px;">import yt</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;">if __name__ == "__main__":</p>
<p style="margin-left: 0px; margin-right: 0px;">root_dir = prefix + 'ds14_a/'</p>
<p style="margin-left: 0px; margin-right: 0px;">particles = root_dir + "ds14_a_1.0000"</p>
<p style="margin-left: 0px; margin-right: 0px;">halos = root_dir + "halos/ds14_a_halos_1.0000"</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;">halo_num = 0</p>
<p style="margin-left: 0px; margin-right: 0px;">if len(sys.argv) > 1:</p>
<p style="margin-left: 0px; margin-right: 0px;">halo_num = int(sys.argv[-1])</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;">pds, halo, center, radius = load_halo(particles, halos, halo_num)</p>
<p style="margin-left: 0px; margin-right: 0px;">p = yt.ProjectionPlot(pds, 0, "dark_matter_density",</p>
<p style="margin-left: 0px; margin-right: 0px;">weight_field=None)</p>
<p style="margin-left: 0px; margin-right: 0px;">p.annotate_sphere(center, radius, circle_args={'color':'r'})</p>
<p style="margin-left: 0px; margin-right: 0px;">p.annotate_title(r"$M_{200b} = %0.2e \mathrm{M_{\odot}/h}$" % halo['m200b'])</p>
<p style="margin-left: 0px; margin-right: 0px;">p.set_cmap("all", "RdGy_r")</p>
<p style="margin-left: 0px; margin-right: 0px;">p.set_axes_unit("Mpccm/h")</p>
<p style="margin-left: 0px; margin-right: 0px;">p.set_zlim('all', 1.0e-3, 1.0)</p>
<p style="margin-left: 0px; margin-right: 0px;">p.save('halo_%04i' % halo_num)<!--EndFragment--><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;">And it gives me the following output:<br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<p style="margin-left: 0px; margin-right: 0px;">...<br>
</p>
<p style="margin-left: 0px; margin-right: 0px;"><br>
</p>
<div> File "//anaconda/lib/python2.7/site-packages/yt/visualization/plot_window.py", line 1227, in __init__</div>
<div> field_parameters = field_parameters, method = method)</div>
<div><br>
</div>
<div> File "//anaconda/lib/python2.7/site-packages/yt/data_objects/construction_data_containers.py", line 250, in __init__</div>
<div> self.get_data(field)</div>
<div><br>
</div>
<div> File "//anaconda/lib/python2.7/site-packages/yt/data_objects/construction_data_containers.py", line 295, in get_data</div>
<div> chunk_fields, "io", local_only = True)):</div>
<div><br>
</div>
<div> File "//anaconda/lib/python2.7/site-packages/yt/utilities/parallel_tools/parallel_analysis_interface.py", line 506, in parallel_objects</div>
<div> for obj_id, obj in oiter:</div>
<div><br>
</div>
<div> File "//anaconda/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 588, in chunks</div>
<div> self.get_data() # Ensure we have built ourselves</div>
<div><br>
</div>
<div> File "//anaconda/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 622, in get_data</div>
<div> self.index._identify_base_chunk(self)</div>
<div><br>
</div>
<div> File "//anaconda/lib/python2.7/site-packages/yt/geometry/particle_geometry_handler.py", line 140, in _identify_base_chunk</div>
<div> self.regions.identify_data_files(dobj.selector)]</div>
<div><br>
</div>
<div> File "//anaconda/lib/python2.7/site-packages/yt/data_objects/data_containers.py", line 583, in selector</div>
<div> self._selector = sclass(self)</div>
<div><br>
</div>
<div> File "yt/geometry/selection_routines.pyx", line 721, in yt.geometry.selection_routines.RegionSelector.__init__ (build/src.macosx-10.5-x86_64-2.7/yt/geometry/selection_routines.c:14458)</div>
<div><br>
</div>
<div>ValueError: Buffer dtype mismatch, expected 'float64_t' but got 'float'<br>
</div>
<div><br>
<br>
</div>
<p style="margin-left: 0px; margin-right: 0px;">Can anyone please help me. I will really appreciate it.<br>
</p>
<p> <br>
</p>
</div>
</body>
</html>