LM | repository contains lecture notes on the theory
kandi X-RAY | LM Summary
kandi X-RAY | LM Summary
This repository contains lecture notes on the theory of linear models. The source code for the lecture notes is in the .Rnw file, the compiled pdf is also provided, as well as R code. You can run the code while reading the notes. Data are located in the directory datacode. On osf, just download the files or directory individually by highlighting the relevant file/directory and clicking download.
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QUESTION
A typical way to use group_by
and then nest
is to estimate a series of models--
ANSWER
Answered 2021-Jun-15 at 19:23We can add ungroup
in between as the nest_by
returns with rowwise
attribute which clashes with the map
QUESTION
I would like to edit the model matrix used by predict.lm() in R to predict main effects but not interactions (but using the coefficients and variance from the full model containing interactions).
I have tried:
...ANSWER
Answered 2021-Jun-14 at 20:19We could calculate the interactions by hand; done easily by first creating the terms trms
, then evaluating them in an eval(parse())
approach.
QUESTION
I am trying the equatiomatic package to plot my lmer model.
...ANSWER
Answered 2021-Jun-14 at 20:36I'm the developer of that package. It should work with lme4::lmer()
equations. The issue here is with dropping the intercept but having it vary randomly at higher levels. See this issue for more details.
If you have suggestions for how you would expect the equation to render, I'm open to working out a fix. But for now, equatiomatic::extract_eq()
assumes that whatever random effects you have also have corresponding fixed effects.
QUESTION
I would like to include the mathematical sign for a multiplication (like the lower-case x) in a plot title.
I have tried using latex2exp
to no avail - can someone help me with this?
The reprex code is this:
...ANSWER
Answered 2021-Jun-14 at 16:15One approach might be to use the unicode code for the multiplication symbol:
QUESTION
I am creating a shiny app to allow the user to upload a CSV, select a dependent and independent variable(s) and then perform a regression analysis. So far I have been able to upload the file, and select the columns of interest based on this answer. But the app is not being able to construct the lm
model
. The purpose is to first generate and display lm
results by using the summary
and then produce some plots. How can I allow the user to perform a simple regression analysis? The sample file can be downloaded from here.
UI
...ANSWER
Answered 2021-Apr-26 at 14:58Try this
QUESTION
I am making a shiny app that allows the user to upload a CSV, then select the independent and dependent variables. Right now I am able to upload a file, select variables and run regression analysis. But, I am stuck at the step where I would pass the lm
object to autoplot
then making it interactive via autoplotly
in a new tab. How can I create interactive regression plots via using user selected variables in a shiny app?
UI
...ANSWER
Answered 2021-Apr-27 at 00:39Try this
QUESTION
I have a task to create different subsets of the same data table as following:
...ANSWER
Answered 2021-Jun-14 at 02:37You can store the output in a list -
QUESTION
I have to program a converter which takes the strings from numbers[]
and outputs them as decimals.
I am looping through size and index to then add up the current index to the power of its position and then sum it all up. Like: 101 = 1^2 + 0^1 + 1^0
So I am currently stuck with this:
...ANSWER
Answered 2021-Jun-13 at 18:24sizeof(); // it will give you the size of datatype (in bytes), not the length of a string.
QUESTION
I am really new to C and in my first half year at university. This is my first questio on StackOverflow.
My task is to program it so every string stored in numbers is being converted into a decimal, without changing anything outside the main function.
I am now trying for the past 4 hours to solve this problem, where I want to iterate trough every char in the string I am currently to then, based on there position in comparison to the length to convert it into a decimal.
My only question here is to someone help me to understand how I can get the string length without using strlen()
due to the fact I can't add #include
This is what I got so far (getting the length of the array to iterate through every index):
...ANSWER
Answered 2021-Jun-13 at 15:10There are a few ways to do it. IMO, a simple, reasonable way to implement strlen
is:
QUESTION
I have a list of lists like out. In each list I have a dataframe (with the same structure, i.e. same dimensions and variable names (id/period/pred_dif):
...ANSWER
Answered 2021-Jun-11 at 22:47We could do this in tidyverse
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