function m = load_csv(path, ncols)
% Read a headerless numeric CSV with ncols columns into a matrix.
s = strtrim(fileread(path));
if isempty(s)
  m = zeros(0, ncols);
  return;
end
v = sscanf(regexprep(s, ',', ' '), '%f');
m = reshape(v, ncols, []).';
end