我有一个包含两列的数据框。第一列是“比率”,第二列的数字表示以该比率测量的值。 例如:
Ratio Intensity
1 0.000 1387.785
2 0.001 1325.254
3 0.003 1307.926
4 0.004 1286.817
5 0.006 1276.197
6 0.007 1251.381
7 0.008 1249.394
8 0.010 1251.923
9 0.011 1263.183
10 0.013 1265.272
11 0.014 1303.354
12 0.015 1336.920
13 0.017 1362.173
14 0.018 1395.946
...
我想对数据进行排序并对强度求和:
Ratio Intensity
1 0.00 1297.822
2 0.01 1311.253
3 0.02 1307.926
4 0.03 1286.817
5 0.04 1276.197
6 0.05 1251.381
7 0.06 1249.394
8 0.07 1251.923
9 0.08 1263.183
10 0.09 1265.272
11 0.10 1303.354
12 0.11 1336.920
13 0.12 1362.173
14 0.13 1395.946
如何在 R 中编写脚本来求和并导出到新的 csv 文件中? 谢谢!
看起来您想要平均值,而不是总和。
library(dplyr)
read.table(text = " Ratio Intensity
1 0.000 1387.785
2 0.001 1325.254
3 0.003 1307.926
4 0.004 1286.817
5 0.006 1276.197
6 0.007 1251.381
7 0.008 1249.394
8 0.010 1251.923
9 0.011 1263.183
10 0.013 1265.272
11 0.014 1303.354
12 0.015 1336.920
13 0.017 1362.173
14 0.018 1395.946") |>
as.data.frame() |>
# Group by hundredth
mutate(group = floor(Ratio*100)/100) |>
# mean per group
summarize(mean = mean(Intensity), .by = group)
结果
group mean
1 0.00 1297.822
2 0.01 1311.253