This paper presents the Nonnegative linear least square method of MATLAB-a quick and precise method of calculating mineral contents of detrital rocks with some examples.

• 通过实例介绍了使用MATLAB工具箱中非负线性最小二乘法根据岩石化学与镜下观察到的矿物种类对碎屑沉积岩中矿物含量进行定量计算的应用。