R 将规则应用于增长窗口
我想使用一个窗口循环数据帧R 将规则应用于增长窗口,r,for-loop,sliding-window,R,For Loop,Sliding Window,我想使用一个窗口循环数据帧Out： 一次增长一个增量（因此窗口的后部固定，窗口的前部增长-窗口变大） 每次增量时，应在窗口上运行以下规则： if (mean(Speed_out) <= 0.152682) Behaviour <- Lying else if (Movement_Out == “left”) <= 20.8 && (mean(Speed_Out) >= 0.200921) Behaviour <- Grazing 供您使用的数据帧
Outif (mean(Speed_out) <= 0.152682)
Behaviour <- Lying
else if (Movement_Out == “left”) <= 20.8 && (mean(Speed_Out) >=
0.200921)
Behaviour <- Grazing
Out <- structure(list(Speed_Out = c(0.22, 0.155, 0.12, 0.09, 0.125,
0.125, 0.155, 0.34, 0.37, 0.185, 0.155, 0.22, 0.22, 0.28, 0.215,
0.06, 0.34, 0.555, 0.275, 0.215, 0.185, 0.06, 0.245, 0.31, 0.345,
0.375, 0.375, 0.87, 1.025, 0.405, 0, 0.185, 0.31, 0.155, 0.125,
0.22, 0.375, 0.345, 0.345, 0.405, 0.31, 0.34, 0.245, 0.155, 0.19,
0.22, 0.185, 0.12, 0.185, 0.155, 0.245, 0.31, 0.155, 0.155, 0.25,
0.215, 0.09, 0.06, 0.245, 0.495, 0.495, 0.34, 0.28, 0.31, 0.28,
0.25, 0.25, 0.185, 0.155, 0.25, 0.28, 0.28, 0.34, 0.215, 0.125,
0.155, 0.34, 0.34, 0.09, 0.59, 1.71, 1.18, 0.185, 0.215, 0.185,
0.185, 0.155, 0.19, 0.19, 0.19, 0.87, 2.045, 2.73, 1.585, 0.22,
0.25, 0.435, 0.405, 0.405, 0.405, 0.715, 0.62, 0.37, 0.4, 0.185,
0.375, 0.59, 0.525, 0.245, 0.495, 0.495, 0.68, 0.775, 0.25, 0.31,
0.34, 0.28, 0.28, 0.25, 1.55, 2.695, 1.705, 1.21, 0.87, 0.25,
1.52, 1.52, 0.405, 0.81, 2.08, 2.915, 1.705, 0.435, 0.22, 0.78,
1.215, 0.84, 0.495, 0.495, 0.56, 0.375, 0.28, 0.715, 1.025, 0.495,
0.65, 1.18, 1.09, 0.995, 0.87, 0.435, 0.125, 0.435, 0.555, 0.775,
1.12, 1.555, 1.15, 0.25, 0.87, 0.93, 0.28, 0.31, 0.31, 0.375,
0.78, 0.655, 0.53, 0.62, 0.525, 0.37, 0.555, 1.025, 0.655, 1.12,
1.585, 0.715, 0.155, 0.28, 1.12, 2.11, 1.645, 0.715, 0.465, 0.84,
0.81, 0.655, 0.84, 0.435, 0.28, 0.215, 0.93, 1.335, 0.65, 0.185,
0.155, 0.34, 0.4, 0.37, 0.435, 0.405, 0.28, 0.28, 0.25, 0.25,
0.745, 1.24, 0.805, 1.055, 1.085, 0.465, 0.375, 0.5, 0.59, 0.37,
0.185, 0.34, 0.37, 0.435, 0.405, 0.06, 0.125, 0.25, 0.31, 0.405,
0.78, 0.56, 0.215, 0.495, 0.87, 1.025, 0.62, 0.405, 0.405, 0.405,
0.31, 0.215, 0.465, 0.435, 0.34, 0.275, 0.215, 0.25, 0.22, 0.22,
0.125, 0.245, 0.34, 0.31, 0.37, 0.31, 0.31, 0.245, 0.185, 0.25,
0.22, 0.22, 0.31, 0.28, 0.22, 0.28, 0.53, 0.655, 0.375, 0.19,
0.405, 0.435, 0.28, 0.215, 0.77, 0.96, 1.865, 1.83, 0.495, 0.655,
1.615, 1.395, 0.31, 0.31, 0.25, 0.28, 0.34, 0.34), Movement_Out = structure(c(2L,
2L, 1L, 3L, 3L, 3L, 3L, 1L, 1L, 1L, 4L, 3L, 3L, 3L, 3L, 4L, 3L,
1L, 4L, 1L, 1L, 2L, 2L, 3L, 4L, 3L, 2L, 4L, 1L, 2L, 1L, 3L, 3L,
1L, 3L, 2L, 4L, 3L, 1L, 3L, 1L, 1L, 1L, 4L, 3L, 3L, 3L, 3L, 1L,
3L, 3L, 3L, 2L, 4L, 3L, 3L, 4L, 2L, 3L, 1L, 1L, 2L, 4L, 1L, 2L,
4L, 3L, 3L, 4L, 3L, 3L, 2L, 4L, 2L, 1L, 2L, 4L, 4L, 2L, 4L, 2L,
1L, 2L, 3L, 1L, 2L, 3L, 3L, 3L, 3L, 1L, 1L, 1L, 2L, 1L, 3L, 3L,
2L, 2L, 3L, 1L, 2L, 4L, 3L, 4L, 2L, 3L, 1L, 4L, 4L, 3L, 1L, 2L,
1L, 1L, 4L, 1L, 2L, 4L, 2L, 1L, 1L, 2L, 4L, 2L, 2L, 4L, 1L, 1L,
2L, 4L, 2L, 4L, 2L, 1L, 2L, 2L, 4L, 2L, 4L, 2L, 4L, 3L, 1L, 4L,
2L, 1L, 1L, 2L, 4L, 2L, 4L, 2L, 4L, 4L, 2L, 4L, 1L, 1L, 4L, 2L,
4L, 4L, 3L, 4L, 4L, 2L, 1L, 1L, 1L, 4L, 1L, 1L, 4L, 4L, 2L, 2L,
4L, 1L, 2L, 2L, 4L, 4L, 4L, 2L, 2L, 1L, 4L, 4L, 2L, 3L, 1L, 2L,
2L, 4L, 4L, 1L, 2L, 4L, 4L, 2L, 2L, 4L, 2L, 4L, 2L, 4L, 1L, 1L,
2L, 1L, 4L, 4L, 3L, 4L, 2L, 4L, 3L, 1L, 1L, 2L, 1L, 1L, 4L, 2L,
4L, 2L, 4L, 3L, 1L, 4L, 1L, 1L, 2L, 4L, 2L, 1L, 4L, 1L, 4L, 3L,
2L, 3L, 2L, 4L, 3L, 3L, 2L, 1L, 3L, 1L, 1L, 3L, 2L, 3L, 3L, 3L,
1L, 2L, 4L, 2L, 3L, 2L, 1L, 4L, 3L, 2L, 4L, 4L, 2L, 4L, 1L, 1L,
2L, 2L, 4L, 1L, 2L, 4L, 2L, 4L, 3L, 4L), .Label = c("forward",
"left", "non-moving", "right"), class = "factor")), .Names = c("Speed_Out",
"Movement_Out"), row.names = c(NA, 283L), class = "data.frame")
Out好吧，我不得不说这比我想象的要简单。我的答案很难看，而且很可能不是最优的，但似乎有效
似乎有几个地方，即使考虑到其余的数据，也没有一个条件得到满足，因此这些人的行为仍停留在NA
library(dplyr)
# Create id variable used to join results later
Out <- Out %>%
mutate(id=row_number())
# Initial window size
window_size <- 4
# Initialize variables used in loop
w <- window_size
i<-1
window_cnt<-1
out_behaviour <- data.frame(id=as.numeric(), Behaviour=as.character(), stringsAsFactors = FALSE)
while (i <= NROW(Out)){
print(paste0("Row: ", i, ", Window Size: ", w))
df <- Out[i:(i+w-1),] %>%
mutate(mean_sp=mean(Speed_Out),
mvmt=sum(ifelse(Movement_Out=="left",1 ,0))/NROW(.)) %>%
mutate(Behaviour=case_when(mean_sp <= 0.152682 ~ "Lying",
mvmt <= 0.208 & mean_sp >= 0.200921 ~ "Grazing",
TRUE ~ as.character(NA)),
window_nr=window_cnt)
if (!all(is.na(df$Behaviour))){
i<-w+i
w<-window_size
out_behaviour <- rbind(out_behaviour, df %>% select(id, Behaviour, window_nr))
window_cnt<-window_cnt+1
} else {
if (w<=NROW(Out)-i){
w<-w+1
} else {
w<-window_size
i<-i+1
}
}
rm(df)
}
# Join Behaviour column bacl to original data frame
Out <- left_join(Out, out_behaviour, by="id") %>% select(-id)
# Clean up workspace
rm(i, w, window_size, window_cnt, out_behaviour)
我知道代码很乱，所以如果需要额外的注释，请告诉我。我建议您在循环中添加一个print（I）和print（w），以查看进度，并确保您不会陷入无限循环。太好了-这项工作太棒了！如果需要，添加规则也很容易。作为一个新手，你建议把打印语句放在哪里？非常感谢。@PharmR先生，我已经更新了我的答案，使代码更加清晰，并为您添加了打印语句。非常感谢您的帮助！我的荣幸。这是一个需要解决的有趣问题：）
library(dplyr)
# Create id variable used to join results later
Out <- Out %>%
mutate(id=row_number())
# Initial window size
window_size <- 4
# Initialize variables used in loop
w <- window_size
i<-1
window_cnt<-1
out_behaviour <- data.frame(id=as.numeric(), Behaviour=as.character(), stringsAsFactors = FALSE)
while (i <= NROW(Out)){
print(paste0("Row: ", i, ", Window Size: ", w))
df <- Out[i:(i+w-1),] %>%
mutate(mean_sp=mean(Speed_Out),
mvmt=sum(ifelse(Movement_Out=="left",1 ,0))/NROW(.)) %>%
mutate(Behaviour=case_when(mean_sp <= 0.152682 ~ "Lying",
mvmt <= 0.208 & mean_sp >= 0.200921 ~ "Grazing",
TRUE ~ as.character(NA)),
window_nr=window_cnt)
if (!all(is.na(df$Behaviour))){
i<-w+i
w<-window_size
out_behaviour <- rbind(out_behaviour, df %>% select(id, Behaviour, window_nr))
window_cnt<-window_cnt+1
} else {
if (w<=NROW(Out)-i){
w<-w+1
} else {
w<-window_size
i<-i+1
}
}
rm(df)
}
# Join Behaviour column bacl to original data frame
Out <- left_join(Out, out_behaviour, by="id") %>% select(-id)
# Clean up workspace
rm(i, w, window_size, window_cnt, out_behaviour)
Speed_Out Movement_Out Behaviour window_nr
1 0.220 left Lying 1
2 0.155 left Lying 1
3 0.120 forward Lying 1
4 0.090 non-moving Lying 1
5 0.125 non-moving Grazing 2
6 0.125 non-moving Grazing 2
7 0.155 non-moving Grazing 2
8 0.340 forward Grazing 2
9 0.370 forward Grazing 2
10 0.185 forward Grazing 3
11 0.155 right Grazing 3
12 0.220 non-moving Grazing 3
13 0.220 non-moving Grazing 3
14 0.280 non-moving Grazing 3
15 0.215 non-moving Grazing 4
16 0.060 right Grazing 4
17 0.340 non-moving Grazing 4
18 0.555 forward Grazing 4
19 0.275 right Grazing 5
20 0.215 forward Grazing 5