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--- documents:110816pyip_cooking [2011/09/26 09:50] – kota
+++ documents:110816pyip_cooking [2016/05/25 07:56] (current) – [plot 3D coordinates using Mayavi] kota
@@ Line 85: / Line 85: @@
   * tested with python2.6, openCV 2.2, numpy 1.6.1, OSX10.6.8
-<sxh python>
+<code python>
 >>> im = cv.CreateImage( ( 5 , 5 ) , 8 , 1 )
 >>> cv.Set( im , 100 )
@@ Line 99: / Line 99: @@
        [100, 100, 100, 100, 100]], dtype=uint8)
-</sxh>
+</code>
 <[[http://stackoverflow.com/questions/5762440/how-to-transform-a-opencv-cvmat-back-to-ndarray-in-numpy|link]]>
@@ Line 108: / Line 108: @@
 An example script for loading (x, y, y) coordinates data from tab-delimited text file and plot them in 3D using [[http://github.enthought.com/mayavi/mayavi/|mayavi2]].
-<sxh python>
+<code python linenums:1>
 from matplotlib import mlab as matp
 filename = '/Users/miura/data.txt'
@@ Line 123: / Line 123: @@
     plin1 = plot3d([x1[idx], x2[idx]], [y1[idx], y2[idx]], [z1[idx], z2[idx]], tube_radius=0.1, colormap='Spectral', color=(0, 0, 1))
 maya.show()
-</sxh>
+</code>
 [{{ :documents:figure20110923:mayaviexample.png?250| plotting data with mayavi}}]
@@ Line 138: / Line 138: @@
 ipython -wthread
 </code>
-or incase of newer ipython
+or incase of newer ipython (version >= 1.1)
 <code>
 ipython --i
@@ Line 160: / Line 160: @@
 Note that in this example,
-<sxh python>
+<code python>
 from mayavi import mlab as maya
-</sxh>
+</code>
 since the namespace "mlab" overlaps with matplotlib.mlab.
+==== plot 3D trajectory using Mayavi ====
+To evaluate 3D particle tracking results, trajectories could be plotted by color coding the time.
+[{{ :documents:figure20111219:snapshot3.png?300| Plotting 3D trajectory. Trajectories are colored so that the beginning of frame is blue and gradually become red towards the end of the sequence}}]