load fisheriris
  [Y2,loss2] = tsne(meas,'Algorithm','exact','NumDimensions',3);
  figure
  v = double(categorical(species));
  c = full(sparse(1:numel(v),v,ones(size(v)),numel(v),3));
  scatter3(Y2(:,1),Y2(:,2),Y2(:,3),15,c,'filled')
  title('3-D Embedding')
  view(-50,8)

Error using sparse
Index exceeds array bounds.

c = full(sparse(1:numel(v), v, ones(size(v)), numel(v), 3));
where numel(v) = 9339, size(v) = 9339 x 1 double

c = full(sparse(1:numel(v), v, ones(size(v)), numel(v), 25));

Error using scatter3 (line 109)
C must be a single color, a vector the same length as X, or an M-by-3 matrix.