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### k-means for set of integers [duplicate]

I'm not really sure where to begin with this but for a simplified example I have a set of integers: {11, 22, 3, 12, 1, 23, 21, 13, 2} I need to partition these into K=3 clusters with initial ...
860 views

### How to do a classification with only one variable? [duplicate]

I would like to classify individuals of a database by a single quantitative variable. Is hierachical clustering suitable to do this? If it is possible, how the algorithm work? If use hierachical ...
28 views

### How to infer “groupings” of data points separated alone one dimension? [duplicate]

I have the following data: ...
3k views

### How to characterize abrupt change?

This question may be too basic. For a temporal trend of a data, I would like to find out the point where "abrupt" change happens. For example, in the first figure shown below, I would like to find out ...
6k views

### Is clustering (kmeans) appropriate for partitioning a one-dimensional array?

I want to group the outcome of a function into 2 (or 3) categories. I have a function efficiency=f(weight,speed,#refueling_stops) that takes 3 input parameters and the output tells me how "efficient" ...
8k views

### How to find the number of clusters in 1d data and the mean of each

We have a list of prices and need to find both the number of clusters (or intervals) and the mean price of each cluster (or interval). The only constraint is that we want cluster means to be at least ...
2k views

### How do you find a cutting point / strong slope within one-dimensional data

I have one-dimensional data. I want to find possible natural cutting points (strong slopes) within the data. For instance, if the data is ...
2k views

### Determining an optimal discretization of data from a continuous distribution

Suppose you have a data set $Y_{1}, ..., Y_{n}$ from a continuous distribution with density $p(y)$ supported on $[0,1]$ that is not known, but $n$ is pretty large so a kernel density (for example) ...
293 views

### Identifying a changed spending pattern

I have a list of numbers and I am trying to detect a drastic point difference from the previous numbers and see if the pattern has changed. For instance, x = [5000,5500,6250,4800,3950,7200,5500,800,...
364 views

### Grouping similar subjects based on slopes

I am studying the responses of 500 subjects to temperature increase using a linear regression on each degree of temperature (from 10°C to 28°C). Thus, it was possible for me to compute the intercept ...
468 views

### Descriptive statistics for dates

I have a series of timestamps (expressed as Unix time) representing certain dates when an event happened. I want to analyze these timestamps to find information such as: average time between events ...
201 views

### Detect weak points of change (temperature profile)

I am working on a method to detect a finite set of significant points of temperature change within a data series. Although my first pass does an okay job of detecting significant temperature ...
248 views

### Cluster real numbers

I have a set of precise measurements, and what I want to do is count the frequency (how many time it appears) for each value. The problem is that these are very precise measurements and with a naive ...