Plotting of Pole Figures

Describes various possibilities to visualize pole figure data.

Import of Pole Figures

Let us start by loading some pole figures.

mtexdata ptx

 loading data ...
 saving data to /home/hielscher/mtex/master/data/ptx.mat

Visualize the Data

By default MTEX plots pole figures by drawing a circle at every measurement position of a pole figure and coloring it corresponding to the measured intensity.

plot(pf)
mtexColorbar

MTEX tries to guess the right size of the circle in order to produce a pleasing result. However, you can adjust this size using the option MarkerSize.

plot(pf,'MarkerSize',4)
mtexColorbar

Contour Plots

Some people like to have their raw pole figures to be drawn as contour plots. This feature is not yet generally supported by MTEX. Note that measured pole figure may be given at a very irregular grid which would make it necessary to interpolate before drawing contours. In this case, however, it seems to be more reasonable to first compute an ODF and than to draw contour plots of the recalculated pole figures.

Nevertheless, MTEX offers basic contour plots in the case of regular measurement grids.

plot(pf,'contourf')
mtexColorbar

When drawing a colorbar next to the pole figure plots it is necessary to have the same color coding in all plots. This can be done as following

mtexColorbar % remove colorbars
CLim(gcm,'equal');
mtexColorbar % add a single colorbar

Plotting Recalculated Pole Figures

In order to draw recalculated one first needs to compute an ODF.

odf = calcODF(pf,'silent')

 
odf = ODF  
  crystal symmetry : mmm
  specimen symmetry: -1
 
  Radially symmetric portion:
    kernel: de la Vallee Poussin, halfwidth 10°
    center: 29690 orientations, resolution: 5°
    weight: 1

Now smooth pole figures can be plotted for arbitrary crystallographic directions.

plotPDF(odf,pf.h,'antipodal')