Questions tagged [scatterplot]

Pairs of (x,y) values plotted as points in Cartesian coordinates. Widely used as an exploratory and diagnostic tool.

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2 votes
0 answers
36 views

How to handle triangle-shaped scatterplot of data?

Over the past year, I have tried to record my productivity in the following way: The first yellow mark is the time I "clock in", or start working for the day. For the five minutes of work ...
1 vote
1 answer
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Is it possible to create a scatterplot that adjusts for controlled variables (e.g. linear regression)

I am pretty familiar with linear regression analysis, but not about how to generate plots using it (aside from residuals, etc.). I'd like to create a scatter plot of two variables, say depression and ...
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1 answer
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Interpreting 2 residuals plots [closed]

Hello. Can anyone help me with interpreting these plots? I would like to know what assumptions of the linear model are not being met and what method should be used to fix the problems. I think there ...
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2 votes
0 answers
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Is there a name for these lines on a plot?

I'm working with plots for which I'm finding the maximum point and labelling the x and y values at which it occurs: My question is, is there an 'official' name for the red dashed lines that extend ...
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Is this relationship between variables linear?

I have four research questions and all of them has the same main "independent variable", as such the relationship between x and y1, y2, y3, y4. This is not a multivariate analysis, I am just ...
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6 votes
3 answers
741 views

Alternatives to scatterplot for visualisation for large samples

I would like to visualise the following scatterplot in a different way that would make it more intuitive. The X axis is trading frequency and describes how many trades were conducted whereas the Yaxis ...
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21 views

Data Analysis for a Time Series Clinical Trial Dataset

I have a Clinical Trial dataset where, I have the values of Blood haemoglobin level for 40 patients for 6 weeks, after a particular treatment. For drawing some meaningful insights from this data set, ...
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Scatter Plot Interpretation for Temperature and Precipitation

The precipitation data points don't make a straight line along the blue regression line and most of them are present between 24.25-25.25 °C (approximately). What does this tell me about the ...
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1 vote
1 answer
176 views

Clustering leading to visually overlapping clusters on scatterplot

I am dealing with a dataset with 13 features. After going through some standard scaling and missing data imputation, I use kmeans from sklearn to create clusters. Now the point is that, although the ...
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0 answers
51 views

funnel-shaped scatterplot - looking for similar statistical methods than correlation or regression

I believe I am looking up wrong keyterms when searching for solutions, so i'd appreciate some help. initial situation: I want to analyse if specific forest stands are more prone to deer damage using ...
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0 answers
31 views

Does this scatterplot indicate homoscedasticity?

Can anyone perhaps confirm if it is true that this scatterplot indicates that my data is homoscedastic? Since there are quite some more datapoints on the upper side, I was a bit hesitating. Thanks a ...
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1 vote
1 answer
176 views

What jitter value should I use for this scatter plot?

I plotted a scatterplot between humidity and temperature (air) in centigrade. I got the following graph; It is evident that the points fall in discrete columns. This might be because of the rounding ...
2 votes
2 answers
596 views

What is the best way to visualise a panel regression?

Simple scatter plots or a correlation matrix can be misleading since they aggregate all years together. What would be te best way to visualise relationships between variables taking time into account? ...
2 votes
1 answer
446 views

What is the best way to represent Spearman’s correlation graphically?

For my thesis research I have to do Spearman’s correlation tests on a set of ordinal variables. I would like to represent the correlations graphically to include them in the report and give a clearer ...
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How to perform a breakpoint analysis on these two variables (Survey Score and Total # of Outages)?

Here is a snippet of the data: I believe both of these are discrete variables. I want to first determine if a correlation exists. Would I utilize Kendall’s Rank Correlation? Second, I want to create ...
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88 views

homoscedasticity violated or not?

I was wondering if the homoscedasticity in these two figures has been violated or not? Best regards, Elise
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39 views

spearman correlation: should only the ranked values be plotted on a scatterplot?

My data is not normally distributed and so I did a spearman correlation rank test. I now need to make a scatterplot showing the spearman rank test results and I am not sure if the scatterplot should ...
1 vote
1 answer
87 views

Linear regression assumptions violated

I have an independent variable hours/day sitting and a dependent variable test scores, I think all of the assumptions of linear regression are violated, as in the pictures that I added So I did one ...
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-1 votes
1 answer
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Mathematical rule for choosing X & Y for scatterplot maximising spread of points [closed]

Is there any method for choosing a combination of X and Y dimensions for a scatterplot, from a larger dataset that has been standardized to be centered at zero and have unit variance, that will ...
0 votes
3 answers
953 views

Spearman correlation test and linear relationship vs monotonic relationship?

I want to use Spearman's correlation test. My data is not normally distributed. Below is a scatterplot of this data. I read somewhere that Spearman's correlation coefficient can describe monotonic ...
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How to display error on a 2d median

Below is a 2d scatter plot where the large green dot is the median of the data in x and y. My question is about whether there is a convention for showing the error on the median. As shown, each of the ...
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1 vote
1 answer
402 views

Can the Response Variable ever be used in Clustering?

I have the following question: Can the response variable ever be used in a clustering algorithm? I understand that in general, clustering is considered to be an "unsupervised learning algorithm&...
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What kind of correlation is this?

I was wondering whether these 2 variables are correlated. According to the analysis, the correlation is 0.89, which is expected, as they are items of the same scale. But I'm having trouble with ...
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1 vote
1 answer
196 views

Downward slope but Spearman correlation coefficient is positive and vice versa

Why the slope and the Rho value not the same? For examples, graph H-DSI shows downward slope but the Rho value is positive (P value=0.9603; r=0.009867). Hope someone can explain it. Thank you. H DSI ...
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2 votes
2 answers
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How do i interpret this Scatter Plot

I'm researching on the relationship between Scholarship and years. I have scatter plot below. The x axis is equal to the total amount of scholarship for a student. The y axis show the term a student ...
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3 votes
1 answer
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How to interpret this scatter plot?

I am simulating a population of binary stars by generating many samples of orbital parameters. I'm investigating the relationship between the inclination of the orbit and the fraction of the ...
1 vote
0 answers
67 views

How do I draw polygons in a scatterplot around groups of points based on a factor other than the factor my colors are based on? [closed]

I pasted the data here: The dataframe contains multiple observations on x and y per country. Each country is also part of a region. Based on this post, I managed to draw ploygons/clusters in the ...
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1 vote
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Visualising a standard multiple regression

I am running a standard multiple regression for my research project. I have 4 predictor variables trying to predict one outcome variable. I've run the analysis in SPSS but Im not sure how I can ...
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Find skewness and kurtosis of a bivariate scatterplot

I was reading this paper in the medical field which proposes a method using two radiological parameters in order to distinguish benign and malignant lesions. In their paper the Authors show this plot ...
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1 vote
1 answer
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Sampling the inside of a curve [closed]

Suppose I have a set of points $S$ in the plane, which defines a curve in a discretized fashion. This could be $3\cdot 10^3$ points on the unit circle: But also could be $3\cdot 10^3$ points ...
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1 answer
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Is it a line graph if it has no lines?

I'm trying to find the correct terminology for the default plt.plot() method from Python's matplotlib. It appears to behave like ...
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0 answers
16 views

Good measures to quantify the effect of outliers

I have two random quantities linked to a set of N random variables. Increasing N The two random quantities should gradually become similar (meaning that the 2 distributions narrows around the same ...
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22 views

How do I find a threshold to minimise some values? Relevant graph included

I am trying to solve two sub problems based on this graph. My overarching problem is to predict the coordinates of a point, and give a confidence to the prediction. The y-axis is kind of arbitrary, ...
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1 answer
98 views

Scatter Plot with Y depending on X

Does a scatter plot make sense if our Y variable is a part of the sum of the X variable? For example, say: ...
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132 views

Heteroscedasticity: When is it OK?

The point of the last analysis in my paper was to check on the basis of which predictor variables the answers to moral dilemmas can be explained. Predictor variables are continuous: dark personality ...
4 votes
4 answers
1k views

How to visualise data where one variable is continuous and the other is categorical?

This question is very simple but I have been struggling in getting the right script for this. My data set goes as follows: ...
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Does this scatter plot suggest non-linearity?

As part of assumption testing for ordinary least squares (OLS), I am examining the linearity between the variables in my model. I'm using scatterplots between the independent variables (IVs) and ...
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260 views

Correct or incorrect interpretation of scatter plots: a comparison among the Pearson, Spearman and Kendall correlations

Cross-reference overlapping question: "Interpretation of a scatter plot: an unclear correlation" I have 3 scatter plots, where 3 variables are plotted against each other as follows: Plot 1: ...
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1 answer
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Interpretation of a scatter plot: an unclear correlation

Cross-reference overlapping question: "Correct or incorrect interpretation of scatter plots: a comparison among the Pearson, Spearman and Kendall correlations" I have this scatter plot ...
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5 votes
4 answers
1k views

The best way to plot high amount of discrete data with 2 variables in R [duplicate]

I am trying to see the relationship between two variables (say A and B) in a plot in RStudio. Both are discrete and range from 1 to 10. However, I have 1000s of data points, so given that there are ...
2 votes
1 answer
38 views

Term for multipanel scatterplots where each row corresponds to a different variable (e.g. R dataframe plots)

Is there a general term for multipanel scatterplots where each row corresponds to a different variable, as when calling R's plot function with a data frame as the argument? This image provides an ...
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How to use a scatter plot to detect non-linear co-dependence between two variables?

A scatter plot matrix of 3 time series (financial returns data) are shown below. It is a multivariate representation of a scatter plot, with the individual pairs shown in the off-diagonals. The ...
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1 vote
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Relationship between Histogram , Scatter plot , Normality , Linearity

I have the following doubt: suppose you have a categorical variable called 'neighborhood' with 20 categorical levels/values ("vila madalena", "mooca", etc). and I want to check ...
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Inferring r2 and pvalues in a scatterplot between observed and modelled values

I have a dataframe, consisting of modelled and MODIS observed data. The values represent mean GPP for the year 2000,2001,2002,2003 .. till 2010. ...
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75 views

Inferring $R^2$ from scatterplot visualization

I have two dataframes (modelled and observed) each representing values of mean NPP for the years 2000,2001,2002....till 2010 ...
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0 answers
251 views

Meaning? In logistic regression, testing "linearly related to log odds" results in a perfect 45 deg line, not a scatter plot

Running glm(Cond1 ~ Level, data = Data1, family="binomial") , I'm testing the assumption that B is linearly related to the log odds. I'm getting a ...
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Deducing information from a scatterplot

I have two tiff files in R (one modelled and one observed). Both tiffs show the spatial maps of gross primary productivity from 2000-2010. The study area is HinduKush Himalaya (http://rds.icimod.org/...
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1 answer
149 views

Data Visualization - how to display error of a color scale?

I've been turning this around in my head and I think the answer is to ultimately tabulate the data, but it's an interesting question so I'll still post it. I have three sets of data of equal length. ...
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How to interpret the outcome of the scatterplot

I wanted to see what is the relation between two variables using scatterplot in r. The outcome can be seen as below. My question is how to interpret this plot. Yes, the two variables are highly ...
0 votes
1 answer
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Explaination behind the relation between the correlataion coefficient and distance of a typical point from the standard deviation line

I am reading a textbook on statists by Freedman, Pisani, and Purves. In one of the chapters about correlation between two variables, it is given that the vertical distance of a typical point from the ...

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