define_input.m fails when .mat file contains only one tree

[dluks]

When a .mat file contains only one tree, nt is equal to 1 and so define_input never assigns the cloud to P.

TreeQSM/src/tools/define_input.m

Lines 73 to 85 in 6630bbf

	%% Estimate the PatchDiam and BallRad parameters
	for i = 1:nt
	if nt > 1
	% Select point cloud
	P = matobj.(names{i});
	inputs(i) = Inputs;
	inputs(i).name = names{i};
	inputs(i).tree = i;
	inputs(i).plot = 0;
	inputs(i).savetxt = 0;
	inputs(i).savemat = 0;
	inputs(i).disp = 0;
	end

This results in an error on line 89:

%% Estimate the stem diameter close to bottom
% Define height
Hb = min(P(:,3));

[zoeschindler]

I never had this issue, although I always have only one point cloud in my .mat files. Is your point cloud in a matrix with 3 columns (xyz)?