public data for wheat_n experiment

The data for the paper "The performances of hyperspectral sensors for proximal sensing of nitrogen levels in wheat". It includes the pre-processed hyperspectral data and Python code to read this data. <br>本数据集为论文《小麦氮含量近地遥感（proximal sensing）检测用高光谱传感器（hyperspectral sensors）性能研究》的配套数据，包含预处理后的高光谱数据（hyperspectral data）以及用于读取该数据的Python代码。