What is the best way to encode categorical variables in datasets with many features and avoid increasing dimensionality of the dataset?

I am working with a large dataset that has many categorical variables with many classes in each variable. I want to encode the categorical variables without increasing the dimensionality of the...

31 January 2021 6,986 3 View

If you have the authority to distribute COVID-19 vaccine to which age group or career would you begin with?

Would they be an A: elderly B: women want to be pregnant, C: health care workers, D: immune compromised E: military servants, F: or others? Please specify

14 December 2020 1,108 61 View

How to test an automatically annotated dataset for sentiment analysis?

Dear all, I have annotated a dataset of 7200 tweets with three sentiment classes: positive, negative and neutral. After training and testing multiple classification models with 6000 training +...

17 October 2020 8,501 3 View

Does electromagnetic fields harmful to our bodies?

Does magnetic field can heat the human body? According to the International Commission on Non-Ionizing Radiation protection (ICNIRP), there is a maximum allowable magnetic field exposure to our...

14 October 2020 7,594 3 View

Please , I need (XRD) data sheet standard (JCPDS manual). for ( hydroxyapatite, multi-walled carbon nanotubes, High-density polyethylene ) materials?

XRD data sheet standard JCPDS manual

01 February 2020 7,225 3 View

I would like to ask how can i get adiponectin as drug to increase insulin sensitivity in obese people ?

Adiponectin as a drug

23 January 2020 8,571 1 View

Where to find EEG dataset for anesthesia?

I am looking for EEG dataset for anesthesia, please where can I find such dataset?

10 November 2019 6,565 3 View

In clustering, How are graphs of KNN built?

09 October 2019 6,583 4 View

What are the current challenges to be considered to solve in Scientific Workflow scheduling in cloud computing?

Scientific Workflow scheduling in cloud computing and I need suggestions on the gaps in this domain. The gaps that would need to be directions for future works?

08 September 2019 4,294 2 View

Is Baron And Kenny 1986 Mediation Approach Out Of Date?

HI RG colleagues, some statistics' comments believe that the Baron And Kenny 1986 mediation method out of date. they suggested new effective approaches in term of testing the mediating variable.

07 August 2019 3,949 15 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Why should we choose deep learning to machine learning? Why is CNN better for image classification? Can I get Typical Answer?

What Characteristics makes CNN work better?

03 March 2021 1,458 4 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Can we block unwanted images during the x-ray prediction?

i am try to classify the x-ray images. During classification , can i block unwanted images (except x-ray image).

03 March 2021 7,100 1 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View