A graphics toolkit, Graf_Tool() is developed which can be used to process and edit graphics. Labels, lines and arrows can be added and the program is very flexible and easy to use. -A graphics toolkit. Graf_Tool () is developed which can be used

matlab矩阵处理例程。A matrix processor, Matx_Proc() is developed which can be used to process and edit matrices and state space models, and perform various kind of matrix analysis in a visible way. -Matlab matrix handling routines. A matrix processor,