Ashutosh Karna

11 Questions 40 Answers 0 Followers

Questions related from Ashutosh Karna

What are the suitable clustering models for high dimensional data?

I have a dataset with 290 rows and 35000 features. What are the consequences of running clustering techniques (such as Hierarchical) on the whole dataset and what should be the most suitable...

02 February 2020 2,919 7 View

How to extract features from time series based samples for clustering?

I have over 1000 samples with each sample itself being a multivariate time series data (of rows between 500 and few thousands). The length of time series differs from sample to sample. What are...

02 February 2020 3,136 3 View

How to compute median for a large multivariate dataset?

Calculating Median in univariate is quite straight forward by just sorting the data. But , in multivariate case, where different features do not follow the same ranking order, how can someone...

01 January 2020 2,856 4 View

What are the valid Oversampling techniques for smaller data to be able to run process capability analysis?

I have a relatively small data consisting of 10 -15 experiments, but to run any statistical process control, one would need a large sample to capture enough variability in the data and be able to...

01 January 2020 5,693 2 View

What are the drawbacks of Calinski-Harbasz score in clustering?

I am running a hierarchical clustering exercise and trying to evaluate it with different measures like Calinski-Harbasz score and Silhuette score. Could anyone tell or point to any document...

12 December 2019 3,350 4 View

How to test repeated measures - 2 way Anova?

I have measurements from several experiments on a specific combination of two different factors, say A and B. From each experiment, I calculate three types of values (to check the performance of...

11 November 2019 5,858 4 View

How to combine multiple LSTM models trained on several smaller samples ?

I have over 500 source files, each of which contains a multivariate time series sequence (same variables though). My objective is to develop a model that can find anomaly by checking the...

10 October 2019 9,380 3 View

What are the suitable pre-processing techniques for Time series data ?

In a typical multivariate scenario, where the time series does not really follow any particular pattern (or distribution), are the techniques like Standardization or MiniMax scaling appropriate ?...

10 October 2019 7,919 4 View

How to treat data with multiple singletons for clustering ?

I am dealing with a clustering problem that requires me to cluster a set of objects based on 'Avg rate of change' in several factors for a give timeframe. Attached is the dendrogram I obtained....

08 August 2019 3,144 7 View

Does Gaussian Mixture model assume data to follow multivariate normal distribution ?

I have a dataset and trying to apply soft clustering, preferably Multivariate Gaussian Mixture model, but I have following doubts : 1. Does Multivariate GMM assume the underlying data to follow...

07 July 2019 1,076 5 View

What are the methods to perform probabilistic clustering for non-normal multivariate data ?

I have a small multivariate data ( < 10,000 records) with none of the variable following normal distribution (mix of right-skewed and left-skewed variables). As Gaussian Mixture Model is not...

07 July 2019 3,910 6 View