Questions tagged [longitudinal]
Data from studies or processes with multiple observations over time. Econometrics is a typical topic where such data would be collected and analyzed. Proper analysis will take into account auto-correlation and cross-correlation.
199
questions
11votes
1answer
740views
Implementing Longitudinal Random Forest with LongituRF package in R
I have some high dimensional repeated measures data, and i am interested in fitting random forest model to investigate the suitability and predictive utility of such models. Specifically i am trying ...
4votes
3answers
76views
Reorganize multiple variables based on date variable in R
If I have a dataset that has scores from the same measure collected at different time points, how can I organize those dates/times so they represents a timepoint after a certain date? Is this possible ...
- 89
3votes
2answers
193views
Within-group operations in R (not rolling sum)
I have a dataset comprised of students (id) and the grade they where in every year:
library(data.table)
set.seed(1)
students <- data.table("id" = rep(1:10, each = 10),
"year" = rep(...
- 161
3votes
1answer
474views
How to calculate nonlinear (binary) Fixed-Effects Logit for Longitudinal/Panel Data?
I'm trying to estimate child work based on a lagged variable on children's school aspirations.
I'm deciding whether I should use glm or clogit to run my models (need fixed effect logits). When I run ...
- 55
3votes
2answers
107views
Carry Forward Data for Each Case
In SPSS, how do I pull forward longitudinal data to blank cells for each id?
Example:
ID Time Gender
1 1 M
1 2 .
1 3 .
2 1 F
2 2 .
2 3 .
3 1 .
3 2 F
3 3 .
How ...
3votes
1answer
36views
R: How to delete ID from a list of multiple strings in a longitudinal format
I had an earlier post regarding how to delete ID if any of the rows within ID contain certain strings (e.g., A or D) from the following data frame in a longitudinal format. These are R code examples ...
- 47
3votes
2answers
268views
(Longitudinal data) Create new variable with last value for each ID
I am working with a longitudinal dataset with ID's, timestamps, and values. I would like to create a new variable for each individual that saves the value for the last timestamp for that individual in ...
- 33
3votes
2answers
130views
How to do longitudinal analysis for 2x2x2 design in R?
I have a dataset with the following variables for the treatment (nutrition, fertilizer), that records algal growth in water across time (t0, t1...t10). In series with fertilizer marked as "nitrogen" , ...
- 115
3votes
1answer
58views
Visualisation of longitudinal meta-analysis in R
I am trying to create a line graph in R that plots longitudinal data as part of a meta-analysis. I am looking to plot age on the x axis, with volume on the y axis. Some studies have up to 4 timepoints....
- 31
3votes
1answer
425views
why do results of clogit and bife function (both in R) differ?
I like to calculate a logistic fixed effect panel regression (conditional maximum likelihood) in R and get predicted values and/or average marginal effects.
I found two functions: bife and clogit ...
- 31
3votes
0answers
526views
Fit curve in spaghetti plot
For descriptive plots in R studio, I would like to fit a regression curve in my spaghetti plot. To create the spaghetti plot I used:
library(lattice)
GCIP <- data_head$GCIP
time_since_on &...
- 493
3votes
1answer
435views
estimate a repeated measures random effects model with a nested structure using `plm()`
Is it possible to estimate a repeated measures random effects model with a nested structure using plm() from the plm package?
I know it is possible with lmer() from the lme4 package. However, lmer() ...
- 7,617
2votes
2answers
52views
R: To convert wide dataframe into longitudinal format with more than more than two columns [duplicate]
I have dataframe like the following:
> head(n)
# A tibble: 6 x 23
`Record ID of REGN DATA` Pain_1 Pain_2 Redness_1 Redness_2 Swelling_1 Swelling_2
<dbl> <chr> &...
- 315
2votes
2answers
40views
Dropping subsequent observations after the occurrence of an event in a longitudinal data set
I got longitudinal data set where I want to drop observations after the event of interest have happend. This means I want to drop all observations after the dummy-variable indicating the event of ...
- 89
2votes
1answer
4kviews
How to check and control for autocorrelation in a mixed effect model of longitudinal data?
I have behavioral data for many groups of birds over 10 days of observation. I wanted to investigate whether there is a temporal pattern in some behaviors (e.g. does mate competition increase over ...
- 31