Questions tagged [difftime]
A function in R that calculates the difference of two times.
difftime
181
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How do I resolve error: objectnotfound, difftime() function in R Language
I have two columns ended_at and started_at. I want to calculate the time difference using this code below
all_trips <- Dfftime(all-trips&ended_at, all_trips&started_at) but it keeps ...
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R POSIXct date difference produce artificial decimal places
I have a POSIXct date column, and try to baseline it. However, I found the difftime() (or just -) operation produce artificial decimal places that should never exist.
>center_coor[,dateTime]
[1] &...
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3
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Use of "cumsum", "difftime" and "lag"
I have three columns in my dataset that I work on for this question.
The first column is called buffer and shows whether a GPS point of an animal is inside the buffer zone (yes/no values). The second ...
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59
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Is there an R function to subtract two date time data?
I have two columns of data that are dttm that I'm trying to get the difference from to then get the total average.
Essentially I have a start time to a trip, an end time. I'd like to know the ...
4
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4
answers
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How to select for rows in a dataframe that have a time within 30 minutes of another dataframe
I have 2 datasets that looks like the following (with about 600 total entries for both)
Dataframe1
name
A_time
measurement_A
A
6/10/22 7:22
3.4
A
6/10/22 16:15
4.4
A
6/11/22 6:15
5.5
A
6/11/22 15:...
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2
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82
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r Language - Difftime function - Why do I get an error?
I have two different variables (ended_at, started_at) containing times in a chr data type in a dataframe called all_trips.
Data from all_trips.
started_at ended_at
1 2019-01-01 ...
2
votes
2
answers
37
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R difftime output different depending on input formats (as.character() wrapper vs without)
example data:
test <- structure(list(date1 = structure(c(1632745800, 1632745800), tzone = "UTC", class = c("POSIXct",
"POSIXt")), date2 = structure(c(1641468180, ...
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45
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The time interval in hours using difftime and if else statements
R script.
I want to do the following.
The dataset is grouped by pid, med and date1.
If pid or med changes then the hours_output == 255, otherwise the hours_output == the time interval in hours.
If the ...
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1
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3
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48
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Last value manually inputted in an r script difftime output
R coding in Databricks.
I want the time intervals in hours between date1 entries, arranged by pid, med and date1.
I want the latest date1 entry in a sequence of events per date to be manually ...
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59
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label is removed from difftime variables after dplyr::filter
When I dplyr::filter a data.frame with labels, the labels remain but not for variables of class difftime:
library(tidyverse)
library(sjlabelled)
df <- data.frame(a = c(1, 2, 3),
...
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1
answer
153
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Rounding the mean of difftime
In my R data.table mdt below, I have calculated a difference in dates using subtraction (simple mathematical expression) as days_elapsed1 and days_elapsed2. The class of these two objects is "...
-1
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1
answer
97
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R difftime() producing incorrect intervals
The data was imported from a CSV file, with the dates originally in characters. I have mutated them separately as I want to do some further analysis on them.
The only other question on the topic I can ...
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1
answer
25
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How can I add the date of the data that satisfies a condition in ifelse in R?
I need to date and time of the data that satisfies a condition in ifelse.
Glucose_4h <- character()
for(i in 1:96){
A <- unlist(difftime(Time_Meal[i], Time_Glucose[1:15372], units="mins&...
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1
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1
answer
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I have 2 kinds of posts (sponsored and non sponsored) for X users. I want to know for each post of a user when the last sponsored post happened (days)
I have 2 kinds of posts (sponsored and non sponsored) for many users. I know the date when each post happened. Now I need to know for each post of a user when the last sponsored post happened (in ...
2
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4
answers
99
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To calculate time differences, is there a way to change all : in a data frame?
I was wondering if there is a way to make all colons in a data frame a period? Or delete them from a data set all together?
I have asked people what time they went to sleep and they've put 21:00 for ...
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