（1）哪位大侠详细知道smoothing kernel method，可否介绍一二，或推荐相关资料。谢谢！

（2）BOJA，哪位大侠用用过，BOJA is a DOS program which is particularly useful when classical parametric methods of statistical analysis are inappropriate. For the bootstrap, the resampling procedures include the standard bootstrap, the balanced bootstrap, and nested bootstrap resampling schemes. The jackknife resampling procedures include the standard, the random, and the grouped jackknife. The internal statistical applications include the analysis of means, medians, (co)variances, correlations, linear regression, and analysis of variance (randomized designs). External statistical applications can be dealt with easily, given that the proper parameter estimates are available on file. The results of the analyses can also be inspected graphically.

Input Requirements
No missing values. Maximum 45 variables, 9999 observations. Full matrix input.

Minimum Requirements
DOS 3.1, 512 KB RAM. Math chip not required, but recommended. Also runs on DEC computers (VMS, Ultrix).

(3)gbutils (Gnuplot Basic Utilities)这个软件包，谁有用过啊？http://cafim.sssup.it/~giulio/software/gbutils/

偶也不会。我要抓狂了......谁帮帮我嘛