Osman Dag

Assoc. Professor @Hacettepe1967. Mostly tweet on #datascience, #rstats, machine learning. Author of onewaytests, AID & GMDH2 R pkgs.

[Osman Dag @dr_osmandag]

📢 Our new article published!

"Testing Equality of Shape Parameters of Several Weibull Populations"

🔗 https://t.co/YdM9wzaLDn
👥 Malwane M. A. Ananda, Samaradasa Weerahandi, Osman Dağ
🙏 Thanks to my co-authors for their great efforts!

[Osman Dag @dr_osmandag]

Our latest article "twowaytests: An R package for two-way tests in independent groups designs" is published on SoftwareX.

🔗https://t.co/OZMkHHrwOY

#DataScience #Statistics #Biostatistics #RStats

[Osman Dag @dr_osmandag]

3/3✏️You can reach the paper with the following link.

🔗https://t.co/9qY2GaGmIB

🗣 If you are unavailable to reach the paper, you can DM me.

#DataScience #Statistics #Biostatistics #RStats

[Osman Dag @dr_osmandag]

1/3✍️🏻I am pleased to share that our latest article "Two Approaches to extend Classical MANOVA Tests to the Unequal Covariances Case" is published on Hacettepe Journal of Mathematics and Statistics.

#DataScience #Statistics #Biostatistics #RStats

[Osman Dag @dr_osmandag]

2/3✍️🏻In this article, we derive two approaches for MANOVA under unequal covariances. I would like to thank to Prof. Sam Weerahandi and Prof. Malwane Ananda for all efforts.

#DataScience #Statistics #Biostatistics #RStats

[Osman Dag @dr_osmandag]

4 ways of finding unique values in R. It will be very beneficial for the researchers who want to reduce duplicated values in dataset.

#datascience #rstats

[Universe of Data Science @unidatascience]

Finding unique values may be a necessity while analyzing a data set. In this tutorial, we will learn four ways of finding unique values. Find out how to find unique values in R.

Learn more: https://t.co/S5qU23dXK9

#DataScience #Rstats

[Osman Dag @dr_osmandag]

How to Use apply Functions in R. Go over apply, tapply, lapply, sapply, vapply and mapply functions in R. It will be very beneficial for the scientists working on data with R.

#datascience #rstats

[Universe of Data Science @unidatascience]

The use of apply functions enables data scientists to make the things easier. In this tutorial, we go over apply, tapply, lapply, sapply, vapply and mapply. Find out how to use apply functions in R.

Learn more: https://t.co/SvkTYwhqJT

#DataScience #Rstats

[Osman Dag @dr_osmandag]

Three ways of merging data frames by common ids, first data ids, second data ids and all ids in R.

#datascience #rstats

[Universe of Data Science @unidatascience]

Sometimes, we need to merge datasets coming from different sources. This ultimate tutorial includes combining the data frames in different ways. Find out how to merge data frames in R.

Learn more: https://t.co/G8cYhKa3vb

#DataScience #Rstats

[Osman Dag @dr_osmandag]

Three ways of converting all columns of data frame to numeric in R.

#datascience #rstats

[Universe of Data Science @unidatascience]

Converting data type to numeric is important while analyzing data in R. We will learn three ways of converting the columns of data frame to numeric. Find out how to convert all columns of data frame to numeric in R.

Learn more: https://t.co/vhVigg2H0A

#DataScience #Rstats

[Osman Dag @dr_osmandag]

@AbdullahTarikA1 🙏

[Osman Dag @dr_osmandag]

Very nice start to New Year!

Our latest paper "GeneSelectML: a comprehensive way of gene selection for RNA-Seq data via machine learning algorithms" is published on Medical & Biological Engineering & Computing.

https://t.co/FDCKAPecPG

#datascience #machinelearning #rstats

[Osman Dag @dr_osmandag]

Three ways of discovering the class of each column in data frame.

#datascience #rstats

[Universe of Data Science @unidatascience]

Class of a variable is important while analyzing data in R. This ultimate tutorial includes three ways of discovering class of each column in data frame. Find out how to obtain class of each column in R data frame.

Learn more: https://t.co/Anwv1j3sBh

#DataScience #Rstats

[Osman Dag @dr_osmandag]

Very easy way of sorting dataframe in R!

#datascience #rstats

[Universe of Data Science @unidatascience]

How to sort a data frame by a single column and multiple columns in increasing or decreasing order!

Learn more: https://t.co/wjormEVWuz

#DataScience #Rstats

[Osman Dag @dr_osmandag]

I'm pleased to share that our latest article "Ensemble Based Box-Cox Transformation via Meta Analysis" is published on Journal of Advanced Research in Natural and Applied Sciences.

https://t.co/2WkvPTRUEL

#datascience #rstats #statistics #biostatistics

[Osman Dag @dr_osmandag]

I am happy to share that our latest article "Diverse Classifiers Ensemble Based on GMDH-Type Neural Network Algorithm for Binary Classification" is published on Communications in Statistics - Simulation&Computation.

https://t.co/82LeEqFdkg

#datascience #machinelearning #rstats

[Osman Dag @dr_osmandag]

I am very happy to share that our article "Heteroscedastic two-way ANOVA under constraints" is published on Communications in Statistics - Theory and Methods. You can reach the tests through twowaytests package in R.

https://t.co/qPoljTvRZJ

#DataScience #RStats

[Osman Dag @dr_osmandag]

Sometimes we need to remove outliers from data. In this tutorial, we learn how to remove outliers from data including multi-variables, a single variable and data by group in R. Find out how to remove outliers from data in R.

https://t.co/NYsctuCbXG

#datascience #rstats

[Osman Dag @dr_osmandag]

Identifying outliers is essential part while analyzing data since they significantly affect statistical models. This inclusive tutorial covers four tests for detecting outliers. Find out how to test for identifying outliers in R.

https://t.co/fcmpcbNWo7

#datascience #rstats

[Osman Dag @dr_osmandag]

I have recognized a package called “correlation”. It is very comprehensive package for correlation analysis.
I have written a short note for myself and shared to whom are interested in.

https://t.co/nn8H7Q80rZ

#datascience #rstats

[Osman Dag @dr_osmandag]

Two sample independent tests are the mostly used methods in studies. This comherensive guide includes the tests for two independent samples when the outcome is continuous. Find out how to use these tests in R.

https://t.co/SckqpCfHLu

#datascience #rstats