青少年机器人创新设计大赛，投球机器人源代码，绝对好用！-Innovative Robot Design Competition of young people, pitching robot source code, the absolute ease of use!

利用三角形单元来解决各节点位移u、v和应力σ_x、σ_y和σ_xy。其中材料厚度h 1，材料为各项同性，杨氏模量为E 1，泊松比v 0，-The nodal displacements u, v and stresses σ_x, σ_y and σ_xy are solved by triangular elements. Where the material thickness h 1, the material is homogeneous, the Young s modulus i

编写代码计算信息增益，splitDataSet函数是用来选择各个特征的子集的，比如选择年龄(第0个特征)的青年(用0代表)的自己，我们可以调用splitDataSet(dataSet,0,0)这样返回的子集就是年龄为青年的5个数据集。chooseBestFeatureToSplit是选择选择最优特征的函数。(Write code to calculate the information gain.SplitDataSet function is used to select the featur