我有一个列表形式的心率数据,每个类别有1AS,1CS,1AI,1CI可变大小。我想输出列表中每个类别的平均值和标准偏差。我有这种格式的数据来计算我已经成功完成的ANOVA和Tukey但是这个意思让我难过!
Group HR
1 1AS 300
2 1AS 280
3 1AS 260
4 1AS 250
5 1AS 300
6 1AS 272
7 1AS 250
8 1AS 198
9 1AS 200
10 1AS 195
11 1AS 214
12 1AS 249
13 1AS 240
14 1CS 250
15 1CS 236
16 1CS 200
17 1CS 272
18 1CS 206
19 1CS 203
20 1CS 237
21 1CS 214
22 1AI 218
23 1AI 276
24 1AI 240
25 1AI 264
26 1AI 300
27 1AI 315
28 1AI 300
29 1AI 285
30 1AI 286
31 1CI 167
32 1CI 233
33 1CI 214
34 1CI 219
35 1CI 214
36 1CI 246
37 1CI 230
38 1CI 218
答案 0 :(得分:3)
假设您的数据位于名为DF
的数据框中:
by(DF$HR,DF$Group,mean)
# DF$Group: 1AI
# [1] 276
# -------------------------------------------------------------------------------------------------------------------------------------------------------------
# DF$Group: 1AS
# [1] 246.7692
# -------------------------------------------------------------------------------------------------------------------------------------------------------------
# DF$Group: 1CI
# [1] 217.625
# -------------------------------------------------------------------------------------------------------------------------------------------------------------
# DF$Group: 1CS
# [1] 227.25
by(DF$HR,DF$Group,sd)
# DF$Group: 1AI
# [1] 30.93946
# -------------------------------------------------------------------------------------------------------------------------------------------------------------
# DF$Group: 1AS
# [1] 36.48551
# -------------------------------------------------------------------------------------------------------------------------------------------------------------
# DF$Group: 1CI
# [1] 23.25595
# -------------------------------------------------------------------------------------------------------------------------------------------------------------
# DF$Group: 1CS
# [1] 25.77236
答案 1 :(得分:2)
使用ave
的另一种解决方案:
ave(DF$HR, DF$Group)
给出平均值和
ave(DF$HR, DF$Group, FUN=sd)
DF是您的数据框。