中文说明：
利用Matlab内建的快速傅氏变换函数可以方便地在波数域计算重磁异常导数。介绍了基于Matlab语言的波数域求导的算法，给出了程序源代码，讨论了一些有助于提高计算精度的编程技巧。通过模型试验和数据分析， 发现在计算垂向导数时波数域求导算法的精度比傅氏级数的精度有明显改善；而水平导数的计算，2种方法的精度相当。在某区钾盐勘探中，用该方法处理高精度重力剖面数据，取得了较好效果。
English Description：
Using Matlab built-in fast Fourier transformation function can be easily in the wavenumber domain magnetic anomaly derivative calculation.Introduced the derivation of wavenumber domain algorithm based on Matlab language, and gives the program source code, discussed some help to improve the calculation accuracy of programming skills.Through model test and data analysis, _ found when calculating the vertical derivative wave number domain derivation of the algorithm accuracy has improved significantly than the accuracy of the Fourier series;The horizontal derivative calculation, the accuracy of two methods.In one district in the exploration of potash, deal with the high accuracy gravity profile data with the method, has obtained the good effect.