我在Markov_chain包中找到了R函数,我将该代码应用于我的数据集,以使用卡方检验来研究马尔可夫链的平稳性,有序性和同质性,但是当我执行代码时,我得到了一个警告:Chi-squared近似可能不正确。尽管如此,测试马尔可夫属性的R函数运行良好。
verifyMarkovProperty(z, verbose = TRUE)
Testing Markov property on given data sequence
Chi-square statistic is: 224.1998 degrees of freedom are: 125 and corresponding p-value is: 1.263105e-07
这没有警告就行了
assessOrder(z, verbose = TRUE)
The assessOrder test statistic is: NaN the Chi-Square d.f. are: 80 the p-value is: NaN
Warning messages:
1: In chisq.test(mat) : Chi-squared approximation may be incorrect
2: In chisq.test(mat) : Chi-squared approximation may be incorrect
3: In chisq.test(mat) : Chi-squared approximation may be incorrect
4: In chisq.test(mat) : Chi-squared approximation may be incorrect
5: In chisq.test(mat) : Chi-squared approximation may be incorrect
这个警告形式R代码自己或在哪里
assessStationarity(z, 1, verbose = TRUE)
The assessStationarity test statistic is: 17.10439 the Chi-Square d.f. are: 0 the p-value is: 0
Warning messages:
1: In chisq.test(mat) : Chi-squared approximation may be incorrect
2: In chisq.test(mat) : Chi-squared approximation may be incorrect
3: In chisq.test(mat) : Chi-squared approximation may be incorrect
4: In chisq.test(mat) : Chi-squared approximation may be incorrect
5: In chisq.test(mat) : Chi-squared approximation may be incorrect
相同的警告信息
有人能帮助我知道这是什么问题吗?我们如何使用似然比检验来检验R中马尔可夫链的平稳性,有序性和同质性?感谢您的帮助