http://featureselection.asu.edu/software.php中的Information Gain，運(yùn)行會(huì)提示，錯(cuò)誤：Undefined variable "weka" or class "weka.attributeSelection.InfoGainAttributeEval".
這個(gè)軟件包是*.jar文件，原以為解壓就能找到安裝文件，但沒有。Weiqiang講要安裝java軟件。Feature Selection Package軟件安裝過程如下
第一步：安裝java(使用我電腦中的“JAVA 虛擬機(jī)”)，并配置環(huán)境變量：計(jì)算機(jī)->屬性->高級系統(tǒng)設(shè)置->環(huán)境變量->lenovo的用戶變量->Path(如果沒有PATH，新建一個(gè)變量PATH即可)->編輯->(加入”; C:\Program Files (x86)\Java\jre1.6.0_02\bin”到“變量值”,注意此處路徑名可能不同)；
第二步：安裝FeatureSelection-Installer.jar到E: \Feature Selection Package： 運(yùn)行cmd->E:(定位到E盤);cmd->cd E:\Kingsoft\other\matlab 2007a\work\Feature selection\說明(目的，定位到FeatureSelection-Installer.jar所在目錄) ->java -jar FeatureSelection-Installer.jar
在安裝過程中會(huì)有提示：
what to do once you've installed Feature Selection Package:
1. Open MATLAB
2. Use MATLAB's 'cd' function to navigate to the folder you
installed Feature Selection Package into.
3. Run the load_fspackage function with the command: 'load_fspackage'
4. Select all of the commands you have run in this session, right click,
and select 'Create Shortcut'. This will give you a shortcut which
you can use to open Feature Selection Package at your choosing.
只要到這里的2，3和4不要管，Weiqiang也不知此處4步代表啥含義，沒管這一步。
第三步：將load_fspackage.m的最開始一句”curPath = pwd;”(pwd的含義查matlab幫助即可，就是當(dāng)前目錄)中將pwd換成load_fspackage.m所在的目錄'E:\Feature Selection Package\fspackage'即可。在要使用該工具包的程序的最開始加上加上run('E:\Feature Selection Package\fspackage\load_fspackage.m')，這樣就不會(huì)出現(xiàn)如下錯(cuò)了：Undefined variable "weka" or class "weka.attributeSelection.InfoGainAttributeEval".
已經(jīng)按照上述步驟，在我臺式機(jī)成功安裝FeatureSelection-Installer.jar軟件(臺式機(jī)原來沒安裝java軟件)。This is with Weiqiang Ren's help.