数字信号处理中经典的FFT算法实现，对理解信号处理帮助很大-A Fast Fourier Transform [FFT] method for frequency sparse functions. Recovers the k most energetic frequencies hidden in a bandwidth-N function in k*polylog[N] time.

基于稀疏表示的正交最小二乘法，使用的语言是matlab，应用比较广阔，设计信号处理中的信号回归，图像处理的压缩等。-Sparse representation based on orthogonal least squares method, the language used is matlab, relatively broad application, design signal processing signal return, image processing, compression

【谷速软件编程】matlab源码-平滑稀疏采样信号和图像的直方图 可以作为参考使用，程序是word版本 -[Valley] matlab source software programming speed- smooth sparse sampling signal and image histogram can be used as a reference, the program is a word version