# Tagged Questions

Presenting results in graphical form; for example, histograms, scatterplots, or boxplots.

98 views

### How to make results using Hellinger distance comparable with Euclidean distance outputs?

I have a two kinds of data for the same geographic region. One is presence-absence data of species (for amphibians, reptiles and birds) and the other has several environmental variables for the same ...
762 views

### Q-Q plot interpretation

Consider the following code and output: ...
223 views

### R getting 2D coordinates from kmeans

I performed and plotted a kmeans analysis in R with the following commands: ...
249 views

### Rationale for the use of Regressogram (Bin-Smooth)

I am taking a class in data mining and we have recently been introduced to bin-smoothing in regression analysis but i cannot seem to understand the usefulness of this method nor how the method works ...
498 views

### Interpreting weird box plot with reversed whiskers

Although I'm fairly new to box plots, I thought I had got the hang of them, until I came upon this one today. I don't know what to make of that bottom "whisker" drawn inside the box. This ...
199 views

### How to find a suitable association of color with data value in a visualization?

I'm working on a software project that involves creating a visualizer for flood simulations. As part of this project, I've created a water gradient that shows water depth at particular points. To set ...
76 views

### Soccer contest rule puzzled me

I have a little knowledge about soccer contest rule, there is a question I cannot understand. The dotplot below shows the numbers of goals scored by 20 teams playing in a city's high school soccer ...
11k views

### Assessing approximate distribution of data based on a histogram

Suppose I want to see whether my data is exponential based on a histogram (i.e. skewed to the right). Depending on how I group or bin the data, I can get wildly different histograms. One set of ...
368 views

### Reading Kmeans data and chart from R

I performed and plotted a kmeans analysis in R with the following commands: ...
86 views

### Plotting predictor effects with credible intervals for Bayesian regression

this is probably a pretty basic problem but got stuck with it. When doing GLMM in R I’ve been using the nice package “effects” from John Fox when I had to display fixed effects of continuous ...
535 views

### Multiple curves when plotting a random forest

I performed a random forest using the randomForest package. I know that if I plot the random forest using the plot() command, I ...
52 views

### Analysis and representation of ranking data

I need your help in analyzing and representing ranking data. Background - there are four models, say A, B, C and D that rank asset classes based on their riskiness. I have ranking data for a week, ...
155 views

### List of graph layout algorithms

I am a newbie in visualizations. Nowadays, I regularly come across graph-based data that I need to visualize. However, different type of data requires different layouts. And as I do not have enough ...
135 views

### Graphical representation of cross-validation errors for regression

What are some good ways of presenting/comparing cross-validated RMSE errors for regression using various models, graphically via plots? As of now, I have been presenting the quantitative results in ...
323 views

### Plotting log likelihood function of Pareto distribution inR

How can I plot log likelihood function with type "I" Pareto distribution function $f(x|\alpha,k)=\alpha k^\alpha/x^{\alpha+1}$ in R? The problem for me is there are two parameters, how can I plot the ...
104 views

### Correlation heatmaps with batch effects

I am interested in plotting correlation heat maps for a multivariate dataset collected in two batches. Some of the variables show a clear batch effect others do not show any batch effect. Is there ...
143 views

### Plotting means and standard deviations

Does it make sense to look at a scatterplot of means versus standard deviations in terms of looking for outliers or changepoints? So the mean is on the x-axis and the standard deviation is on the ...
367 views

### Precision - Recall: Graphical Representation

I'm a little bit confused with precision recall. I read some papers about recommender systems, where in one paper they have a graphical representation and in other papers they don't (they just have ...
349 views

### Histogram of uncertain data

I have a set of values, each of these values has its own mean and variance. I want to be able to account for this variance when I plot the histogram of the means. Something like an error bar on the ...
466 views

### What is the best probabilistic graphical model toolkit for MATLAB?

I want to use the Probabilistic graphical model toolkit for my research. (preferably MATLAB based). There seems to be pretty a lot of different toolkits available online (UGM, Bayes Net Toolbox for ...
148 views

### Two-way ANOVA repeated measures

I would like to know, if you got a significant interaction in a two-way repeated measures ANOVA in SPSS, how can you visualize the interaction (especially using syntax)?
154 views

### Plotting selected explanatory variables in multiple linear regression with interaction terms

I have a question about plotting multiple linear regression results. I would like two graphs, one that shows the estimated relationship between d15N and avomc, and another that shows the relationship ...
110 views

### Plot the binomial distribution

How to plot the binomial distribution for p = 0.3, p = 0.5 and p = 0.7 and the total number of trials n = 60 as a function of k the number of successful trials. For each value of p, determine 1st ...
69 views

### Plotting a histogram estimate together with an analytical solution of the mean and covariance parameters

How do I plot a histogram estimate of this marginal distribution p(x1): ...
272 views

### Using scatter plots to understand multiple values of Y for a given X

As I understand it, a scatter plot can contain multiple data points with the same independent variable value, and different values for the dependent variable. For example, if the horizontal axis ...
84 views

### Understanding the whiskers of a boxplot

I have a question regarding the interpretation of the whiskers of a boxplot. I have read the following: "On the top and bottom of the rectangle, the “whiskers” show the range of 1.5 times the distance ...
144 views

### How could I visualise the importance of different inputs to the forecast for a black-box non-linear model?

I am building an interactive forecast tool (in python) as an aid to forecasting that is done in my organisation. To date the forecast process has been largely human driven, with forecasters ...
167 views

### What insights can be found by using leverage plots?

I'm trying to figure out whether leverage plots can provide valuable information. See example here.
123 views

### How to design good plots for multiple time series?

I have huge (about 100 000) set of time series. I need to show between 5 to 10 time series, chosen semi-randomly on one chart. Chart estate is very limited - plot for each time series is only 100px x ...
225 views

### Plotting a model in R

I have used the vglm() function from the VGAM package to obtain a Weibull model for some data. I would like to plot the curve that this model is represented by. How do I do this? Here's my input and ...
95 views

### Visualizing association results after adjusting for confounders

I'm trying to find a way to visualize the results of an association analysis where I corrected for confounding variables. I have a set of cytokine data (amount of protein in the blood) from a set of ...
196 views

### Understanding OLS regression slope formula

I understand the intuition behind the OLS model: to minimize the squared residuals. Is there a way, however, to interpret the formula for the slope of the regression line intuitively? That is \$m = ...
278 views

### Representing experimental data

I have an argument with my advisor over data visualization. He claims that when representing experimental results, the values should be plotted with "markers" only, as presented in the image bellow. ...
128 views

### Trend line does not seem to fit data

I'm trying to do a simple scatterplot and trend line in R, but it doesn't look right. Have I messed up something blatantly obvious? Any ideas as to why the line doesn't fit the data? Here is the ...
500 views

### R: Visualizing document clustering results

I have a k-means clustering result with 35 clusters, there are 5000 documents that each belong to one of the 35 cluster. I would like to visualize the results of the clustering algorithm on a scatter ...
165 views

### Comparing and visualizing densities of two samples in R (2)

Comparing the density function of two specific samples in R, both areas are clearly different and cannot be equal to one (see graph linked below). I would like both areas equal one on the same graph ...
46 views

### Question on re-indexing data for graphing

A file contains data for 1975-2012 of housing prices across a panel of countries. However, it's indexed to 2005, so each country's housing price series converges to 100 in 2005, then they spread ...
248 views

### Build a path probability tree for journeys through a website

I'm currently doing analysis on a website which requires that I create a decision tree diagram showing the likely route that people take whenever they arrive on the website. I am dealing with a ...
83 views

### Rescale vector logarithmically in matlab

I'm quite weak in math so I hope you don't mind that I'll try to fully describe how I think when solving this (I think easy) problem. Please tell me if I made some totally invalid assumptions. I have ...
157 views

### Statistically describing/visualizing “non-overlap” in a large set of time-series data

Extensive edit of the original question while I've been able to refine my thoughts and write some better code. Consider data from two processes, each with can produce many, many time series curves ...
268 views

### What is this graph called?

Sorry for the game-image link, I've wondered what this diamond-shaped graph is called for some time, any idea what type of chart/graph this is?
101 views

### Interpretation of output from spec.pgram

I’m analyzing a single time series (yearly observations) and the objective is to check whether the series has any oscillatory pattern. In that respect, I tried to use the R-routine: ...
135 views

### Exploratory data analysis for discrete data

I am using a probit and a logit model for obtaining the choice probabilities of some data. What kind of plots can be useful to conduct a exploratory data analysis for these data? Here is the ...
144 views

### understanding variation of data and visualization

1) What is the threshold or measure to say that the variation of data is high? Typically we say high or low variation by comparing with another data set. But there is only one data set. 2) We can use ...
77 views

### Visualize before and after score

Any suggestions on how to visualize the change in a score before and after an event? I don't want to plot two bars next to each other, though I realize that is the simplest. Is there something more ...
20 views

### Possible graphical options for my requirement

These are few of the few extra tasks which I wanted to incorporate graphically . It will include main thing as 1 . An 'x' travelling a complete process and the milestones which are covered. Apart ...
98 views

### Exploratory data analysis

I have two data sets: one has a continuous response variable whereas the other discrete. I will use a linear model for the continuous data and a logit and probit model for the discrete data. What I ...
85 views

### What are the limitations of graphical displays with a small sample size (n=18)

I have a small sample size (n=18) and am performing univariate analysis. I have graphical displays (stem and leaf plot, dotplots, boxplots and a cumulative distribution plot). I am trying to ...