Only one pair of measurements will contain real values, while the other pair will contain Not-a-Numbers ( NaNs). 仅有一对度量包含实数值,而另一对度量将包含Not-a-Numbers(NaN)。
The explicit values remain as NaNs. 显式的值仍然保留为NaN。
In the MATLAB surface-making the digging method and the patching method are brought to success by replacing parts of the functional data by the MATLAB inherent variables NaN ( or Inf) and replacing NaNs in the functional data by proper real numbers, respectively. 在MATLAB绘图中,将函数数据的某一部分换成内置变量NaN(或Inf),或者将函数数据中的NaN换成适当的实数,可分别实现绘图中的挖、补方法。