[英]How do I generate a frequency table on R via dplyr and plot its values with ggplot?
我需要从两个分类变量列中做一个频率表,其中一个是 5 岁年龄组,另一个是来自 brfss2013 数据集的健康状况(五个州),我从中提取了感兴趣的列:
> hlthgrpq1 <- brfss2013 %>% select(genhlth, X_ageg5yr)
因此生成了一个两列框架,2 个变量的 491775 个观察值。
genhlth X_ageg5yr
1 Fair Age 60 to 64
2 Good Age 50 to 54
3 Good Age 55 to 59
4 Very good Age 60 to 64
5 Good Age 65 to 69
我可以使用 'by' 函数生成一个汇总表:
> by(hlthgrpq1$genhlth, hlthgrpq1$X_ageg5yr, summary)
hlthgrpq1$X_ageg5yr: Age 18 to 24
Excellent Very good Good Fair Poor NA's
6896 10266 7795 1873 303 69
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hlthgrpq1$X_ageg5yr: Age 25 to 29
Excellent Very good Good Fair Poor NA's
5779 8488 6521 1751 325 46
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hlthgrpq1$X_ageg5yr: Age 30 to 34
Excellent Very good Good Fair Poor NA's
6412 9958 7977 2295 496 75
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 35 to 39
Excellent Very good Good Fair Poor NA's
6366 10169 8236 2637 638 61
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 40 to 44
Excellent Very good Good Fair Poor NA's
6689 11130 9193 3334 1067 95
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 45 to 49
Excellent Very good Good Fair Poor NA's
7051 12278 10611 4343 1815 112
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 50 to 54
Excellent Very good Good Fair Poor NA's
8545 15254 13761 6354 3120 139
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 55 to 59
Excellent Very good Good Fair Poor NA's
8500 16759 15394 7643 3998 197
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 60 to 64
Excellent Very good Good Fair Poor NA's
8283 16825 16266 8101 3955 229
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 65 to 69
Excellent Very good Good Fair Poor NA's
7479 15764 15600 7749 3200 205
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 70 to 74
Excellent Very good Good Fair Poor NA's
5491 11943 13125 6491 2721 196
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 75 to 79
Excellent Very good Good Fair Poor NA's
3320 8501 10128 5545 2426 173
----------------------------------------------------------------------------------------------------------------
hlthgrpq1$X_ageg5yr: Age 80 or older
Excellent Very good Good Fair Poor NA's
3697 10285 14400 8116 3695 322
这就是我陷入困境的地方。 我已经尝试了几个小时试图到达这里:
谢谢你的帮助。
(这是针对特定任务的,因此我只能使用 dplyr 和 ggplot2,因此,没有 reshape2 或 tidyr。)
首先:对于将来的发布,最好始终包含示例数据。 请参阅此处如何提供包含样本数据的最小可重现示例/尝试。
基础 R 中的解决方案。
as.data.frame.matrix(t(table(df)));
# Fair Good Very good
#Age 50 to 54 0 1 0
#Age 55 to 59 0 1 0
#Age 60 to 64 1 0 1
#Age 65 to 69 0 1 0
或者像这样的tidyverse
方法?
library(tidyverse);
df %>% count(genhlth, X_ageg5yr) %>% spread(genhlth, n);
## A tibble: 4 x 4
# X_ageg5yr Fair Good `Very good`
# <fct> <int> <int> <int>
#1 Age 50 to 54 NA 1 NA
#2 Age 55 to 59 NA 1 NA
#3 Age 60 to 64 1 NA 1
#4 Age 65 to 69 NA 1 NA
或者,如果您坚持只使用dplyr
而不是tidyr
,您可以这样做:
df2 <- df %>%
count(genhlth, X_ageg5yr);
df2 <- as.data.frame.matrix(xtabs(n ~ X_ageg5yr + genhlth, data = df2));
# Fair Good Very good
#Age 50 to 54 0 1 0
#Age 55 to 59 0 1 0
#Age 60 to 64 1 0 1
#Age 65 to 69 0 1 0
这基本上归结为从宽到长的重新格式化,因此围绕该主题进行了大量讨论(例如here )。
df <- read.table(text =
"genhlth X_ageg5yr
Fair 'Age 60 to 64'
Good 'Age 50 to 54'
Good 'Age 55 to 59'
'Very good' 'Age 60 to 64'
Good 'Age 65 to 69'", header = T)
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