时间序列( Time Series )是地学研究中经常遇到的问题。在时间序列研究中,时域和频域是常用的两种基本形式。其中,时域分析具有时间定位能力,但无法得到关于时间序列变化的更多信息;频域分析(如 Fourier 变换)虽具有准确的频率定位功能,但仅适合平稳时间序列分析。然而,地学中许多现象(如河川径流、地震波、 ...
Sometimes, Data was saved as Excel file format. And, it often contains strings and numerals in a column, we all know that Matlab reads the data as a m-by-n Cell Arrary. It is difficult to get and set all together, the following is an example to convert numerals to string in Cell Arrary. ...