将所有数据标准化为r中的单个基因(观察值)
我有850种蛋白质的一些蛋白质表达数据,我想将数据标准化为参考蛋白质。这是纠正技术错误的好方法。我是R的新手,刚想好制作一个整洁的数据集。但当我搜索标准化时,主要是缩放数据。我找不到与数据集中的数据点进行比率的好方法。所以我有以下内容,其中type=D或T,pt.num=1-8,在612.9KB的文件中有859个GeneID和9952个元素将所有数据标准化为r中的单个基因(观察值),r,normalization,plyr,R,Normalization,Plyr,我有850种蛋白质的一些蛋白质表达数据,我想将数据标准化为参考蛋白质。这是纠正技术错误的好方法。我是R的新手,刚想好制作一个整洁的数据集。但当我搜索标准化时,主要是缩放数据。我找不到与数据集中的数据点进行比率的好方法。所以我有以下内容,其中type=D或T,pt.num=1-8,在612.9KB的文件中有859个GeneID和9952个元素 > head(df10g) GeneID type pt.num value 1 A2M D 1 8876.5 2
> head(df10g)
GeneID type pt.num value
1 A2M D 1 8876.5
2 ABL1 D 1 2120.8
3 ACP1 D 1 1266.6
4 ACP5 D 1 67797.6
5 ACVRL1 D 1 650.1
6 ACY1 D 1 6264.8
318 IGF2R D 1 6294.8
我想为每个pt.num.type规范化为IGF2R。但我不太明白它的语义。我想要这种类型的函数
Norm.ig2Fr=GeneID.type.pt.num(value)/IG2FR.type.pt.num(value)
Norm.ig2fr=ASM.D.1 (value)/IG2FR.D.1 (value)
Norm.ig2fr=8876.5/6294.8
期望的输出是
GeneID type pt.num value Norm.ig2fr log2Norm.ig2fr
1 A2M D 1 8876.5 1.41 0.49
2 ABL1 D 1 2120.8
3 ACP1 D 1 1266.6
4 ACP5 D 1 67797.6
我想我可以使用mutate或ddply变换,但是我缺少一些东西来将比率的分母固定到相同的GeneID值,但改变pt.num和type
df11 <- ddply(df10g, .(pt.num), transform, Norm.ig2b=value/IGF2R)
df11我想这可能就是你的意思。我无法用plyr
想出解决方案。但是,我想用dplyr
提出一个建议。我在这里创建了一个示例数据来演示代码。我想您应该使用groupby()
对type
和pt.num
进行分组。然后,您需要在mutate()
中进行归一化<代码>值[GeneID==“IGF2R”]
指定每组中IGF2R的值。例如,对于D-1组,value[GeneID==“IGF2R”]
为1281.000,对于T-1组,value[GeneID==“IGF2R”]
为1561.364。使用这些值,R对每组进行归一化
set.seed(111)
mydf <- data.frame(GeneID = rep(c("A2M", "ABL1", "ACP1", "ACP5",
"ACVRL1", "ACY1", "IGF2R"), times = 2),
type = rep(c("D", "T"), each = 7),
pt.num = 1,
value = runif(14, 1200, 8800),
stringsAsFactors = FALSE)
# GeneID type pt.num value
#1 A2M D 1 5706.658
#2 ABL1 D 1 6721.257
#3 ACP1 D 1 4015.207
#4 ACP5 D 1 5113.421
#5 ACVRL1 D 1 4070.240
#6 ACY1 D 1 4379.364
#7 IGF2R D 1 1281.000
#8 A2M T 1 5245.444
#9 ABL1 T 1 4484.421
#10 ACP1 T 1 1911.980
#11 ACP5 T 1 5423.927
#12 ACVRL1 T 1 5685.737
#13 ACY1 T 1 1710.273
#14 IGF2R T 1 1561.364
library(dplyr)
group_by(mydf, type, pt.num) %>%
mutate(out = value / value[GeneID == "IGF2R"])
# GeneID type pt.num value out
#1 A2M D 1 5706.658 4.454847
#2 ABL1 D 1 6721.257 5.246884
#3 ACP1 D 1 4015.207 3.134433
#4 ACP5 D 1 5113.421 3.991743
#5 ACVRL1 D 1 4070.240 3.177394
#6 ACY1 D 1 4379.364 3.418708
#7 IGF2R D 1 1281.000 1.000000
#8 A2M T 1 5245.444 3.359527
#9 ABL1 T 1 4484.421 2.872118
#10 ACP1 T 1 1911.980 1.224557
#11 ACP5 T 1 5423.927 3.473840
#12 ACVRL1 T 1 5685.737 3.641520
#13 ACY1 T 1 1710.273 1.095371
#14 IGF2R T 1 1561.364 1.000000
这个解决方案很好。这正是我想要的。谢谢你的帮助@新的快乐。我很高兴听到这对你有帮助。:)
set.seed(111)
mydf <- data.frame(GeneID = rep(c("A2M", "ABL1", "ACP1", "ACP5",
"ACVRL1", "ACY1", "IGF2R"), times = 2),
type = rep(c("D", "T"), each = 7),
pt.num = 1,
value = runif(14, 1200, 8800),
stringsAsFactors = FALSE)
# GeneID type pt.num value
#1 A2M D 1 5706.658
#2 ABL1 D 1 6721.257
#3 ACP1 D 1 4015.207
#4 ACP5 D 1 5113.421
#5 ACVRL1 D 1 4070.240
#6 ACY1 D 1 4379.364
#7 IGF2R D 1 1281.000
#8 A2M T 1 5245.444
#9 ABL1 T 1 4484.421
#10 ACP1 T 1 1911.980
#11 ACP5 T 1 5423.927
#12 ACVRL1 T 1 5685.737
#13 ACY1 T 1 1710.273
#14 IGF2R T 1 1561.364
library(dplyr)
group_by(mydf, type, pt.num) %>%
mutate(out = value / value[GeneID == "IGF2R"])
# GeneID type pt.num value out
#1 A2M D 1 5706.658 4.454847
#2 ABL1 D 1 6721.257 5.246884
#3 ACP1 D 1 4015.207 3.134433
#4 ACP5 D 1 5113.421 3.991743
#5 ACVRL1 D 1 4070.240 3.177394
#6 ACY1 D 1 4379.364 3.418708
#7 IGF2R D 1 1281.000 1.000000
#8 A2M T 1 5245.444 3.359527
#9 ABL1 T 1 4484.421 2.872118
#10 ACP1 T 1 1911.980 1.224557
#11 ACP5 T 1 5423.927 3.473840
#12 ACVRL1 T 1 5685.737 3.641520
#13 ACY1 T 1 1710.273 1.095371
#14 IGF2R T 1 1561.364 1.000000
library(data.table)
foo <- setDT(mydf)[, out := value / value[GeneID == "IGF2R"], by = list(type, pt.num)]
print(foo)
# GeneID type pt.num value out
#1: A2M D 1 5706.658 4.454847
#2: ABL1 D 1 6721.257 5.246884
#3: ACP1 D 1 4015.207 3.134433
#4: ACP5 D 1 5113.421 3.991743
#5: ACVRL1 D 1 4070.240 3.177394
#6: ACY1 D 1 4379.364 3.418708
#7: IGF2R D 1 1281.000 1.000000
#8: A2M T 1 5245.444 3.359527
#9: ABL1 T 1 4484.421 2.872118
#10: ACP1 T 1 1911.980 1.224557
#11: ACP5 T 1 5423.927 3.473840
#12: ACVRL1 T 1 5685.737 3.641520
#13: ACY1 T 1 1710.273 1.095371
#14: IGF2R T 1 1561.364 1.000000