中心点垂直磁场，使用matlab已有的erf误差函数，图形已绘制，绘制偏b比偏t的曲线-The center point of the vertical magnetic field using matlab existing erf error function, the graphics have been drawn, draw partial b than partial t curve

matlab磁法正演模拟程序，是学习磁法勘探必备的知识，是了解磁异常的有效办法-Magnetic forward matlab simulation program, is to learn essential knowledge magnetic exploration is an effective way to understand the magnetic anomalies