从旋转矩阵到四元数的转换，matlab代码。,From the rotation matrix to quaternion conversion, matlab code.

数学输出旋转矩阵源代码，输入行数和列数，自动计算好，支持C-Mathematical rotation matrix output source code, input the number of rows and columns, automatically calculate the support C

This the README file for the Isogeometric Analysis (IGA) Matlab code. The code supports one, two and three dimensional linear elasticity problems. Extended IGA for hole, inclusion and crack modelling is also implemented. Structural mechanics p