跨订购组的趋势测试

如何测试订购组的趋势。我使用prop.trend.test但它并没有整理成组，不给的sum of ranks预期输出，z value ... 我使用这个命令 prop.trend.test (birthweight2$lbw2 ,birthweight2$gestwkgp)跨订购组的趋势测试

我有这样的数据集

lbw2   gestwkgp 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 4 
low birth weight 2 
normal birth weight 4 
normal birth weight 4 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 2 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 4 
normal birth weight 4 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
low birth weight 3 
low birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
low birth weight 1 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
low birth weight 1 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 4 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 2 
normal birth weight 3 
low birth weight 2 
normal birth weight 3 
low birth weight 2 
low birth weight 2 
normal birth weight 4 
normal birth weight 2 
normal birth weight 3 
low birth weight 1 
normal birth weight 3 
normal birth weight 3 
low birth weight 1 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
low birth weight 2 
normal birth weight 4 
low birth weight 2 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 2 
normal birth weight 3 
normal birth weight 3 
low birth weight 1 
normal birth weight 4 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 2 
normal birth weight 3 
normal birth weight 3 
normal birth weight 2 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 3 
normal birth weight 4

来源

2014-01-15 Keniajin

我会更清楚什么样的错误的来源是，如果你张贴'输出（出生weight2）'，但我想你不明白什么类的gestwkgp2列是如何订购的。 –

gestwkgp是类因子，我不想将它用作分组变量 – Keniajin

我不认为这是prop.trend.test如何工作。您需要一个额外的限定符，将您的数据分为前/后方案。然后你想看看这两种情况下的低/正常体重是否有差异。考虑将你的问题定义为2x2列联表，其中列是前/后，行是重量类别。

    BEFORE AFTER 
low-weigh   freq  freq 
normal-weight  freq  freq

那么问题就变得像如果治疗对体重没有任何影响，因此函数的语法将变为：

prop.trend.test(c(low-weight-after, normal-weight-after),c(rowSums(contingency_table)))

来源

2015-07-05 10:56:07 bioSlayer

跨订购组的趋势测试

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