英文:
List Opearation
问题
我正在尝试对列表中的项目执行循环操作，虽然看起来很简单，但由于无法检测到的错误，我没有得到预期的解决方案。代码如下：
multinoms <- list() ###用于存储计算的多项式密度的空列表for (l in 1:length(sampled_geno)){for (i in 1:length(sampled_geno[1])){b <- as.data.frame(table(sampled_geno[i]))multinoms[l] <- dmultinom(x=c(b$Freq[1], b$Freq[2], b$Freq[3]), prob= c(b$Freq[1]/sum(b$Freq),b$Freq[2]/sum(b$Freq),b$Freq[3]/sum(b$Freq)))}}
Sampled_geno是一个长度为5的列表。使用我的代码，我只得到一个计算出的密度，重复了5次，尽管列表的值是不同的，如下所示：
> sampled_geno[[1]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 1 1 1 2 0 0 0 0 1 1 1 0 0 0 1 2 0 2 0 0 0 0 0 1 1 1 0 2 1 0 1 0 1 1 0 1[93] 0 2 1 1 1 0[[2]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 0 1 2 0 1 1 1 0 0 1 1 0 0 2 0 1 1 1 1 1 0 0 1 1 0 1 2 0 1 0 1 0 2 1 1 1[93] 0 0 0 1 0 0[[3]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 2 0 1 1 1 1 0 1 0 1 2 0 0 1 0 1 0 2 1 2 1 1 1 1 0 1 0 1 2 1 1 2 1 1 1 1[93] 1 0 0 0 1 1[[4]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 0 1 1 0 1 0 0 1 1 1 1 1 1 0 0 0 0 2 1 0 0 1 0 0 0 2 1 0 0 1 0 1 0 2 2 0[93] 0 0 1 0 0 1[[5]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 1 0 2 1 1 0 2 0 0 0 0 1 0 0 1 0 1 1 1 1 1 1 1 1 0 2 1 1 0 2 0 1 0 2 2 0[93] 0 0 0 1 1 1
非常感谢任何帮助。
英文:
I am trying to perform a loop operation on the items of a list and while it seeems simple enough, I am not getting the expected solution due to a bug I can't detect. the code is:
multinoms<- list() ###Empty list for storing computed multinomial densitiesfor (l in 1:length(sampled_geno)){for (i in 1:length(sampled_geno[1])){b <- as.data.frame(table(sampled_geno[i]))multinoms[l] <-dmultinom(x=c(b$Freq[1], b$Freq[2], b$Freq[3]), prob= c(b$Freq[1]/sum(b$Freq),b$Freq[2]/sum(b$Freq),b$Freq[3]/sum(b$Freq)))}}
Sampled_geno is a list of lenght 5. Using my code, I only get one computed density repeated 5 times although the list values are different as we see below.
[[1]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 1 1 1 2 0 0 0 0 1 1 1 0 0 0 1 2 0 2 0 0 0 0 0 1 1 1 0 2 1 0 1 0 1 1 0 1[93] 0 2 1 1 1 0[[2]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 0 1 2 0 1 1 1 0 0 1 1 0 0 2 0 1 1 1 1 1 0 0 1 1 0 1 2 0 1 0 1 0 2 1 1 1[93] 0 0 0 1 0 0[[3]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 2 0 1 1 1 1 0 1 0 1 2 0 0 1 0 1 0 2 1 2 1 1 1 1 0 1 0 1 2 1 1 2 1 1 1 1[93] 1 0 0 0 1 1[[4]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 0 1 1 0 1 0 0 1 1 1 1 1 1 0 0 0 0 2 1 0 0 1 0 0 0 2 1 0 0 1 0 1 0 2 2 0[93] 0 0 1 0 0 1[[5]][1] 1 0 2 0 1 1 0 1 1 1 2 2 1 1 0 0 2 0 1 1 0 0 1 1 1 2 1 0 0 0 2 0 1 0 0 1 1 1 0 0 0 2 1 1 1 1[47] 2 2 1 2 0 2 1 1 1 0 1 0 2 1 1 0 2 0 0 0 0 1 0 0 1 0 1 1 1 1 1 1 1 1 0 2 1 1 0 2 0 1 0 2 2 0[93] 0 0 0 1 1 1
Any help is really appreciated.
sampled_geno <- list(c(1, 0, 2, 0, 1, 1, 0, 1, 1, 1, 2, 2, 1, 1, 0, 0, 2, 0, 1, 1, 0, 0, 1, 1, 1, 2, 1, 0, 0, 0, 2, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 2, 1, 1, 1, 1, 2, 2, 1, 2, 0, 2, 1, 1, 1, 0, 1, 1, 1, 2, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 2, 0, 2, 0, 0, 0, 0, 0, 1, 1, 1, 0, 2, 1, 0, 1, 0, 1, 1, 0, 1, 0, 2, 1, 1, 1, 0), c(1, 0, 2, 0, 1, 1, 0, 1, 1, 1, 2, 2, 1, 1, 0, 0, 2, 0, 1, 1, 0, 0, 1, 1, 1, 2, 1, 0, 0, 0, 2, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 2, 1, 1, 1, 1, 2, 2, 1, 2, 0, 2, 1, 1, 1, 0, 0, 1, 2, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 2, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 2, 0, 1, 0, 1, 0, 2, 1, 1, 1, 0, 0, 0, 1, 0, 0), c(1, 0, 2, 0, 1, 1, 0, 1, 1, 1, 2, 2, 1, 1, 0, 0, 2, 0, 1, 1, 0, 0, 1, 1, 1, 2, 1, 0, 0, 0, 2, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 2, 1, 1, 1, 1, 2, 2, 1, 2, 0, 2, 1, 1, 1, 0, 2, 0, 1, 1, 1, 1, 0, 1, 0, 1, 2, 0, 0, 1, 0, 1, 0, 2, 1, 2, 1, 1, 1, 1, 0, 1, 0, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1), c(1, 0, 2, 0, 1, 1, 0, 1, 1, 1, 2, 2, 1, 1, 0, 0, 2, 0, 1, 1, 0, 0, 1, 1, 1, 2, 1, 0, 0, 0, 2, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 2, 1, 1, 1, 1, 2, 2, 1, 2, 0, 2, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 2, 1, 0, 0, 1, 0, 0, 0, 2, 1, 0, 0, 1, 0, 1, 0, 2, 2, 0, 0, 0, 1, 0, 0, 1), c(1, 0, 2, 0, 1, 1, 0, 1, 1, 1, 2, 2, 1, 1, 0, 0, 2, 0, 1, 1, 0, 0, 1, 1, 1, 2, 1, 0, 0, 0, 2, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 2, 1, 1, 1, 1, 2, 2, 1, 2, 0, 2, 1, 1, 1, 0, 1, 0, 2, 1, 1, 0, 2, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 2, 1, 1, 0, 2, 0, 1, 0, 2, 2, 0, 0, 0, 0, 1, 1, 1))
答案1
得分: 1
在sampled_geno中，使用[[ ]]而不是[]来访问列表元素。
for (l in 1:length(sampled_geno)){b <- as.data.frame(table(sampled_geno[[l]]))multinoms[[l]] <- dmultinom(x=c(b$Freq[1], b$Freq[2], b$Freq[3]), prob= c(b$Freq[1]/sum(b$Freq),b$Freq[2]/sum(b$Freq),b$Freq[3]/sum(b$Freq)))}
[[1]][1] 0.009551857[[2]][1] 0.009774618[[3]][1] 0.009624812[[4]][1] 0.009718148[[5]][1] 0.009416344
英文:
In sampled_geno use [[ ]] instead of [] to access the list element.
for (l in 1:length(sampled_geno)){b <- as.data.frame(table(sampled_geno[[l]]))multinoms[[l]] <- dmultinom(x=c(b$Freq[1], b$Freq[2], b$Freq[3]), prob= c(b$Freq[1]/sum(b$Freq),b$Freq[2]/sum(b$Freq),b$Freq[3]/sum(b$Freq)))}
[[1]][1] 0.009551857[[2]][1] 0.009774618[[3]][1] 0.009624812[[4]][1] 0.009718148[[5]][1] 0.009416344
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