search for: device_info_serial

...econd, etc.) I need to create a vector containing only the first measurement of every trip. I need this to see at what time a bird leaves the nest and eventually make a histogram out of that. I need to write a piece of code that would look something like this: bird121trip1 <- (data[which(data$device_info_serial == 121 & [which(data$tripID == 1)] & [which(data$time == "lowest"),] bird121trip2 <- (data[which(data$device_info_serial == 121 & [which(data$tripID == 2)] & [which(data$time == "lowest"),] bird130trip1 <- (data[which(data$device_info_serial == 130 &...