Large lists of vectors can be imported from a text file by the command
fname = fullfile(mtexDataPath,'vector3d','vectors.txt');
v = vector3d.load(fname,'ColumnNames',{'polar angle','azimuth angle'})
v = vector3d
size: 1000 x 1
In order to visualize large lists of specimen directions scatter plots
scatter(v,'upper')

or contour plots may be helpful
contourf(v,'upper')
