matlab中图例换行, 使用array或cell是不行的, 需要[]
vClassNumString = [];
for k = 1 : length(vClassName)
vClassNumString = [vClassNumString,sprintf('%s %d\n', vClassName{k}, vClassNum(k))];
end
legend(vClassNumString);
vClassNumString = [];
for k = 1 : length(vClassName)
vClassNumString = [vClassNumString,sprintf('%s %d\n', vClassName{k}, vClassNum(k))];
end
legend(vClassNumString);