All Questions
36 questions
0
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67
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Interpreting the Y-axis of a visreg visualizaion of a binominal logistic regression model
This is a long post, apologies for the length. In sum, I just want to know what the Y-axis represents in the below plots.
Here's the background:
I have a binomial logistic regression model in which ...
- 153
0
votes
0
answers
49
views
Gap in Partial Residuals Plot for Logistic Regression Model
I'm working on a logistic regression model using R with a binary outcome (prescribed DPP-4 inhibitors or other drugs) and several predictors. My model is specified as follows:
...
- 51
1
vote
1
answer
887
views
Visualising log odds from logistic regression model in R
I'm working on a logistic regression analysis using R and aiming to visualize the effects of the predictor "age" on the binary dependent variable "domestic violence." My dataset ...
cd21
1
vote
2
answers
2k
views
How to plot interaction term in logistic regression in R
I'm working on the logistic regression with interaction term between gender and education years as below. gender is a factor varibale with two value and eduyears2 is a numeric variable. and the ...
- 11
0
votes
0
answers
188
views
Principal component Analysis using median as the center
Please I’m performing an analysis which requires data reduction technique. After preliminary analysis the data is suitable for principal component analysis and I’m comfortable using R but I want to ...
0
votes
1
answer
1k
views
Interpretation of logit versus independent variable plot for logistic regression
I plotted the log odds of my outcome variable against my predictor variables, hwt and ist. There is a hard vertical line in my hwt plot and a hard diagonal line in my ist plot. I have two questions: (...
- 39
0
votes
0
answers
975
views
R plot Odds Ratio for each value in logistic regression
I am trying to replicate the method in section 3a of this paper where, for a logistic regression model, they plot the functional relationship between a continuous variable and the odds for developing ...
- 229
0
votes
0
answers
139
views
Plotting probabilities from firth's logistic regression with ordinal predictor in R
I have fit a model using firth's logistic regression.
library(logistf)
Model <- logistf(a~b, data = data)
Where b is an ordinal variable with 3 levels. ...
- 306
3
votes
1
answer
925
views
Plot ROC curve in R with the PRROC package
After many hours of research, trial and error and frustration I hope someone here will be able to guide me in the right direction. I am fairly new to R and statistics and can not wrap my hand about ...
- 35
2
votes
2
answers
74
views
How to plot results from analysis of different datasets into one graph
I conducted the same logistic regression analysis for five different datasets. Now I would like to plot the results (the Odds-Ratios) all into one graph. Is this even possible? And how would I do it?
- 21
2
votes
0
answers
499
views
Interpretating `allEffects` and missing p-values
I need to run a logistic regression with random effects, about wheelchair users and hinderance due to environmental barriers:
...
- 51
0
votes
2
answers
7k
views
How to find cutoff point in Logistics Regression using R
I have run a Logistics Regression model in my data set. Below is the code:
...
ssp
1
vote
0
answers
123
views
Interpretation of P-value vs. Plot when performing Logistic Regression in R
I am new to R and Logistic Regression so I will try to be as clear as possible.
I did the following really as a test case as proof of concept of what I've been trying to learn.
I have performed ...
- 19
2
votes
1
answer
2k
views
Surface Plot for Logistic Regression Interactions [closed]
I'm trying to visualize some different interactions from a logistic regression in R. I'd like create a surface plot of the predictive model with two predictor variables along the x and y, then the ...
- 23
0
votes
0
answers
663
views
Interpreting decision boundary - Logistic regression in R
I have plotted the Decision boundary for my logistic regression but I don't clearly understand how to interpret it. How do I know on which side of the boundary y=1 and on which y=0?
Here is the plot:
...
- 1
1
vote
2
answers
107
views
Why does my model suggest Gall is not significant, when the plot suggests it is?
I have trouble with interpreting the output of a general linear model, which I have fitted to some data. Here are my data:
...
- 11
1
vote
1
answer
2k
views
Interpreting predicted probability plots for a binomial GLM [closed]
Even though this may first appear coding-related, I am not interested in the particular code, but rather in the interpretation of the resulting plots. Therefore, I though this is more appropriate here ...
- 840
5
votes
2
answers
6k
views
Slope and intercept of the decision boundary from a logistic regression model
I was plotting a 2D illustration of a simple logistic regression model, which takes two variables into account. The plot shows the datapoints in terms of the two variables in addition to the decision ...
- 1,441
3
votes
0
answers
270
views
How to present predicted probabilities for multiple predictors
I have performed a multinomial logistic regression using the multinom function in R. I have one categorical response variable with 3 levels, 3 continuous predictors and 3 categorical predictors (with ...
- 867
1
vote
2
answers
2k
views
How to assess quality of model with quasi-binomial GLM residual plot?
I am currently completing quasi-binomial regression and I am using this line of R code to plot the residuals.
...
- 11
7
votes
2
answers
7k
views
How to use boxplots to find the point where values are more likely to come from different conditions?
I have plotted some data using box plots.
I am comparing Condition 1 (left) and Condition 2 (Right) values. My aim is to find a point at which we make a decision where the value changes from point ...
- 151
3
votes
1
answer
3k
views
Plotting results of ordered logistic regression analysis
I tried to plot the results of an ordered logistic regression analysis by calculating the probabilities of endorsing every answer category of the dependent variable (6-point Likert scale, ranging from ...
- 101
1
vote
0
answers
254
views
plot logistic regression line over heat plot
My data is binary with two linear independent variables. For both predictors, as they get bigger, there are more positive responses. I have plotted the data in a heatplot showing density of positive ...
- 123
43
votes
2
answers
76k
views
Interpretation of plot (glm.model)
Can anyone tell me how to interpret the 'residuals vs fitted', 'normal q-q', 'scale-location', and 'residuals vs leverage' plots? I am fitting a binomial GLM, saving it and then plotting it.
- 531
1
vote
1
answer
832
views
Plot one predictor and its quadratic term versus response variable (GLM binomial distribution)
I have the following model with four independent variables:
Model_A <- glm(GRSP~ppt+tem+density+land+I(land^2), family=binomial())
When I plot the variable <...
- 13
1
vote
2
answers
409
views
Graph with 2 interacted continuous predictor vatiable
When using glm(link=logit), I detected a significant interaction between two continuous predictor variables. How can I present the results visually using R?
- 11
2
votes
1
answer
167
views
VIsualizing the effect that only one predictor has on the outcome (R)
So I have performed a logistic regression on a data set with multiple predictors. I want to graphically represent the relationship between the outcome and only one of the predictors. What would be the ...
- 23
6
votes
2
answers
6k
views
Plotting a categorical response as a function of a continuous predictor using R
I would like to plot the relationship between a binary categorical response variable and a continuous predictor to study its shape. The goal is to prep a logistic regression.
This image may clarify:
...
- 63
4
votes
1
answer
4k
views
How to interpret this residuals vs fitted plot for logistic regression using R
I am working on a logistic regression on some fundraising data where "gave" is a rare event (approx 3.5%). My current model has 64% accuracy on test data and an AUC of .604.
When I run the standard ...
- 183
3
votes
2
answers
4k
views
Detecting heteroscedasticity - Can I use Breusch-Pagan Test on binary logistic regression?
I'm currently testing a (binary) logistic regression model, which seems to have at least some issues with multicollinearity. Now I don't really trust the data anymore and would like to also test it on ...
1
vote
0
answers
3k
views
How to plot binomial regression model in R
I´m trying to visualize a glm model with a binomial response variable, I want to put a line in the plots, but neither lines or <...
- 701
6
votes
3
answers
23k
views
Plotting logistic regression interaction (categorical by continuous) in R
Hello I have the following logistic model with a categorical variable interaction which I wish to plot in R but I am struggling to find any solutions -
...
- 63
2
votes
1
answer
440
views
Probability Curve from logit model
Related my earlier question here. Having "mastered" linear regression, I'm trying to learn everything I can about logistic regression and am having issues turning largely "useless" ...
- 2,645
12
votes
1
answer
29k
views
Graphing a Probability Curve for a Logit Model With Multiple Predictors
I have the following probability function:
$$\text{Prob} = \frac{1}{1 + e^{-z}}$$
where
$$z = B_0 + B_1X_1 + \dots + B_nX_n.$$
My model looks like
$$\Pr(Y=1) = \frac{1}{1 + \exp\left(-[-3.92 + 0....
- 2,645
12
votes
1
answer
7k
views
Logistic quantile regression – how to best convey the results
In a previous post I’ve wondered how to deal with EQ-5D scores. Recently I stumbled upon logistic quantile regression suggested by Bottai and McKeown that introduces an elegant way to deal with ...
- 5,996
6
votes
3
answers
4k
views
Creating univariable smoothed scatterplot on logit scale using R
I am learning logistic regression modeling from the book Applied Logistic Regression by Hosmer.
I need to create a plot named "create univariable smoothed scatterplot on logit scale", ...
- 3,249