翻老代码发现之前写了一个简单的符号工具箱化简方程，好久不用遗忘了，留个代码备份
syms fx fy fy2 = floor(fy/2)*2; fx2 = floor(fx/2)*2; x_f2 = fx - fy2; y_f2 = fy - fx2; xr = (fx - fy) / 2; yr = (fx + fy) / 2; xr_f = xr - floor(xr); yr_f = yr - floor(yr); x_fg = yr_f + xr_f; y_fg = yr_f - xr_f; delta_x = x_f2 - x_fg; delta_y = y_f2 - y_fg; xr_m = (delta_x + delta_y) / 2; yr_m = (delta_x - delta_y) / 2; simple_x = simplify(xr_m) simple_y = simplify(yr_m)