In Mathematica, vectors, matrices, and arrays of arbitrary dimensions are uniformly represented as lists or 'lists of lists.' This prevents a lot of problems common in other technical computing software in which users have to work with and convert between many different representations. For example...
This setting can be very important when performing a task that results in many rapid changes – such as inserting a large number of rows in the Merit Function Editor. Note that regardless of this setting, the UI will always display the final system when the E...
如式(8)所示,将第 n 个方程乘以-bn-1(an)-1 得到的 结果加到第 n-1 个方程上,这样,第 n-1 个方程就消 去了系数 bn-1.同理,之后的每一个方程逐步消元递 减,直到消去对角线以下的所有元素,线性方程组变 图 1 稀疏矩阵算法优化流程 成: Fig.1 Optimization flowchart of sparse matrix algorithm ...