Error in sym: Character vectors and strings in the first argument can only specify a variable or numMATLAB报错：Error in sym: Character vectors and strings in the first argument can only specify a variable or number.
MATLAB报错：Error in sym: Character vectors and strings in the first argument can only specify a variable or number.问题错误使用 sym>convertChar (line 1459)Character vectors and strings in the first argument can only specify avariable or number. To eva
