gtReadGrains : commented and removed protected words (i.e. size) from variables

Signed-off-by: Laura Nervo <laura.nervo@esrf.fr>

4_grains/gtReadGrains.m

 function [r_vectors, positions] = gtReadGrains(phaseid)
 %     [r_vectors, positions] = gtReadGrains(phaseid)
-%     ----------------------------------------------------------------
+%     ----------------------------------------------
 %     Reads from the 4_grains/phase_## folder
+%     r_vectors = [grainid rx ry rz]
+%     positions = [grainid grainx grainy grainz grainsize]
 
-r_vectors  = []; % r_vectors = [grainid rx ry rz]
-positions  = []; % positions = [grainid grainx grainy grainz grainsize]
+r_vectors  = [];
+positions  = [];
 
 % how many grains in the sample?
 sample = [];
@@ -14,11 +16,11 @@ maxgrainid = length(sample.phases{phaseid}.grains);
 tmp = sample.phases{phaseid};
 for grainid = 1 : maxgrainid
     r_vectors(grainid,:) = [grainid tmp.R_vector(grainid,:)];
-    size =  ( tmp.boundingBox(grainid,4) + tmp.boundingBox(grainid,4) + tmp.boundingBox(grainid,4) ) / 3;
-    positions(grainid,:) = [grainid tmp.center(grainid,:) size];
+    grainsize =  ( tmp.boundingBox(grainid,4) + tmp.boundingBox(grainid,4) + tmp.boundingBox(grainid,4) ) / 3;
+    positions(grainid,:) = [grainid tmp.center(grainid,:) grainsize];
 end
 
 save(fullfile('4_grains',sprintf('phase_%02d',phaseid),'r_vectors.mat'),'r_vectors');
 save(fullfile('4_grains',sprintf('phase_%02d',phaseid),'positions.mat'),'positions');
 
-end
+end % end of function