DB4小波变换的实现 这是一篇学术论文，有主要程序部分-DB4 wavelet transform to achieve this is an academic, a major part of the procedure

用c语言写的db4多尺度小波去噪代码，效仿matlab的方式，将分解后的系数存放在原数组里-Db4 multi-scale wavelet denoising code, c language written emulate matlab manner, the decomposition coefficients stored in the original array