这两天无聊，刚写完，拿出来抛砖引玉，呵呵。
其实比较简单，说白了就是计算等价的年复利/月复利/连续复利，（金融工程书前面章节都有），不过用起来还是比较方便，可以一次计算多个复利频率。 用matlab写的，有图形用户界面，具体介绍可以见：http://xaero.mmiyy.cn/financial-engineering/irategui.htm,
可以免费下载和使用，下载地址是：http://xaero.mmiyy.cn/financial-engineering/download.htm
(因为今后还会做一些别的工具，所以介绍页面和下载页面分开来了）
部分介绍：

Interest Rate Converter--- Graphic User Interface

1-Introduction

Since it is not easy for everyone, especially those who get to know matlab for a short tiime, to use command-line functions,I decide to write some GUI(Graphic User Interface) for some of the functions in this section. This GUI tool is based on the function: interest rate converter.Using this tool you can convert interest rate from one compounding frequence to another in a graphic window. It is straight-forward and easy to cope with.

2-How to use the GUI Tool

Since the purpose of this tool is the calculation of equivalent interest rates with different compunding frequencies, you are better to get your data ready before running it:
1.Interest rate to be converted. It should be a scalar bigger than 0 and smaller than 1, and it is supposed to be filled into the blank in the left-top of the window.
2.Original compounding frequency. Be awared, it should be a single value. You should have it selected in the left list box of the window.
3.New compounding frequencies. Having the frequency/frequencies selected in the right list box of the window. Remember, you can select more than one value, which would be very helpful when you need a comparison between different compounding frequencies.
After doing so, you can click the "convert" button on the bottom, then the answer(s) will be displayed in the box in the right-bottom side of the window, from which you can select and copy the answers.

3-Down this tool

Since the available space of this website is limited, I have to pack all my programs into one zip file to save space.
To download the zip file, please goto this URL:Download, or from the navigation panel on the right side.
You can download the whole pack and run this tool by typing "irategui" in the matlab command window after you decompressed the zip file.