Ridvan Gedik

Ridvan Gedik

Welcome to my channel!

I am very excited to share my knowledge and experience in optimization, supply chain management, analytics and lean/six sigma processes here at my KZbin channel. The videos that you see on this channel are meant to be supplementary learning materials for my students and may be used as reference for anyone else who is interested in expanding the horizon. Feel free to let me know if you would like to see a video on a topic not covered here yet.

If you like any of the content, please hit the thumbs-up button and consider subscribing (and activating the "bell") to be notified when new videos arrive.

Thanks for being here.
Best,
RG

Visualizing Decision Trees in R

9:23

Visualizing Decision Trees in R

3 жыл бұрын

Decision Trees in R Bank Example

14:34

Decision Trees in R Bank Example

3 жыл бұрын

Confusion Matrix and ROC Plots in R

13:17

Confusion Matrix and ROC Plots in R

3 жыл бұрын

Training and Testing Ridge Regression in R

7:15

Training and Testing Ridge Regression in R

3 жыл бұрын

Training and Testing Lasso Regression in R

25:42

Training and Testing Lasso Regression in R

3 жыл бұрын

Preparing Data in R One Hot Encoding for Lasso and Ridge Models

9:13

Preparing Data in R One Hot Encoding for Lasso and Ridge Models

3 жыл бұрын

Understanding Logistics Regression Results in R

21:44

Understanding Logistics Regression Results in R

3 жыл бұрын

Creating Train and Test Data and Running Logistics Regression in R

12:47

Creating Train and Test Data and Running Logistics Regression in R

3 жыл бұрын

Preparing Categorical Data for Logistics Regression in R

7:37

Preparing Categorical Data for Logistics Regression in R

3 жыл бұрын

Modeling and Solving Multi Period Inventory Planning Problem

11:33

Modeling and Solving Multi Period Inventory Planning Problem

3 жыл бұрын

Guidelines for Developing an Mathematical Model

10:03

Guidelines for Developing an Mathematical Model

3 жыл бұрын

Modeling and Solving Transportation Problem

12:58

Modeling and Solving Transportation Problem

3 жыл бұрын

Modeling and Solving Blending Problem

13:54

Modeling and Solving Blending Problem

3 жыл бұрын

Applications of Linear Optimization

2:55

Applications of Linear Optimization

3 жыл бұрын

Excel Solver Parameters and Options

3:12

Excel Solver Parameters and Options

3 жыл бұрын

Exercise 1 Mathematical Modeling in Excel Solver

4:35

Exercise 1 Mathematical Modeling in Excel Solver

3 жыл бұрын

Analyzing Results via Excel Solver Reports

14:55

Analyzing Results via Excel Solver Reports

3 жыл бұрын

Modeling Mathematical Models in Excel Solver Part 2

8:08

Modeling Mathematical Models in Excel Solver Part 2

3 жыл бұрын

Modeling Mathematical Models in Excel Solver Part 1

7:26

Modeling Mathematical Models in Excel Solver Part 1

3 жыл бұрын

Characteristics of Linear Optimization Models

4:07

Characteristics of Linear Optimization Models

3 жыл бұрын

Optimization Basics

10:14

Optimization Basics

3 жыл бұрын

Linear Optimization What We Will Learn

1:43

Linear Optimization What We Will Learn

3 жыл бұрын

Forecasting with Holt and Winters in R

10:53

Forecasting with Holt and Winters in R

3 жыл бұрын

Forecasting with Exponential Smoothing in R

6:29

Forecasting with Exponential Smoothing in R

3 жыл бұрын

Forecasting with Moving Average in R

9:33

Forecasting with Moving Average in R

3 жыл бұрын

Forecasting Fundamentals

23:05

Forecasting Fundamentals

3 жыл бұрын

Forecasting with Moving Average Method

24:30

Forecasting with Moving Average Method

3 жыл бұрын

Forecasting with Exponential Smoothing Method

25:23

Forecasting with Exponential Smoothing Method

3 жыл бұрын

Optimizing Forecasting Parameters in Excel Solver

12:21

Optimizing Forecasting Parameters in Excel Solver

3 жыл бұрын

Пікірлер

@umarhussain5957

@umarhussain5957 Ай бұрын

It's better to use levels argument in factor data type for outcome rather than changing into 1 and 0

@TimothyBell-oq2tg

@TimothyBell-oq2tg 5 ай бұрын

Thank you for this. I"m totally new to R and was able to follow this to develop a classifier for a totally different dataset. Nice tutorial!

@muysantos2859 6 ай бұрын

you are a great teacher! thank you!!

@vishalmasirkar7155

@vishalmasirkar7155 9 ай бұрын

Finally got it . Thanks a lot Sir...

@233Bromovys 10 ай бұрын

great

@haydawg1545 Жыл бұрын

Wouldn't you have to take in account for the 20$ per unit? For example, the coefficient of PA would be 11 + 20, making it 31$ per unit. Correct me if Im wrong

@ashwinnibavanimahadevan9969

@ashwinnibavanimahadevan9969 Жыл бұрын

Excellent Sir...this video is a hidden Gem

@ektatomar5567 Жыл бұрын

thank you , sir

@ricktikra9579 Жыл бұрын

Hi! do you by chance post the datasets you use for these tutorials anywhere in your website? if yes, would it be ok if I ask those for practice?

@erorr4o4 Жыл бұрын

can you please share the installation file for minitab for macos

@colly9888 Жыл бұрын

brilliant! thank you. i hope kristen's kreation's provide their workers with better pay soon.

@seanpitcher8957

@seanpitcher8957 Жыл бұрын

This is a fantastic tutorial of an incredibly powerful tool! Having coded this by hand, I'm just blown away.

@roshinirachel9339

@roshinirachel9339 Жыл бұрын

Sugg: voice could be recorded clearer please ,its volume is low ,makes it hard to listen .(thought its full volume on my system) so .

@lute248 Жыл бұрын

what happens if i don't specify method = "class", i tried it on my rcode and notice i get a much smaller classification tree

@mehmetfatihyildirim3449

@mehmetfatihyildirim3449 Жыл бұрын

Hello! Thank you for the video. I have a question regarding the family option. Should you set it to "gaussian" instead of "binomial" since the latter is used for Logistic Regression? However, Lasso is extension of linear regression that is coming from gaussian family.

@Batuhannnn1905

@Batuhannnn1905 Жыл бұрын

Çok teşekkürler sayın hocam.

@icefunkdark8555

@icefunkdark8555 2 жыл бұрын

Thanks for sharing. Do you mind showing a full (from data preparation to data analysis) video? If not, thanks anyways :)

@keena1326 2 жыл бұрын

One of the best explanations of the Sample T Test I've seen. You explain many little details that for some reason many other people leave out. The Hypothesis explanations...rejecting Null, etc...was really good. Other videos just skip over that. This was good!

@pauleseme8406 2 жыл бұрын

Thanks, I am educating myself with the series.

@taimafiras1086

@taimafiras1086 2 жыл бұрын

How can I estimate process variation for subgroup?

@AlphenLi-h5g 2 жыл бұрын

thanks for sharing

@Livefree103 2 жыл бұрын

just loved the content. keep it up sir

@landersebastian7886

@landersebastian7886 2 жыл бұрын

good day sir. may I ask for you help

@akhlaqdanish374

@akhlaqdanish374 2 жыл бұрын

Thank you sir well explanation

@corybeyer1 2 жыл бұрын

This is the best series in logistic regression in R. Thank you for taking the time to share your valuable knowledge.

@ribakhan8046 2 жыл бұрын

When I am applying mymodel 2 its says that "object my model2 not found. Please help

@akakarun8 2 жыл бұрын

Thanks for this

@prashantkawle8733

@prashantkawle8733 2 жыл бұрын

Great👍

@justme-dz4bi 2 жыл бұрын

thanks!

@ishitarajpal4437

@ishitarajpal4437 2 жыл бұрын

From where can we download HyTex data in order to practice?

@salahnasr5195 2 жыл бұрын

Hi Doctor,,, Can you tell us more about ATAforecasting: Automatic Time Series Analysis and Forecasting using the Ata Method

@alhassanabd2714

@alhassanabd2714 2 жыл бұрын

I need a machine learning project ready for viewing

@erikbravo1768 2 жыл бұрын

The video was great. Awesome way of teaching!

@reyesryan1763 2 жыл бұрын

What dataframe is meant here mymodel2?

@howcani8328 2 жыл бұрын

Or how can we plot coef(CV, s = "lambda.min") as a histogram, can you please tell me a command to do it as I am a bit new R user. thanks in advance

@howcani8328 2 жыл бұрын

Hello, Thank you for your valuable video. Can you please guide me on how to save the name of the features and coefficient values of coef(CV, s = "lambda.min") as .csv file ?

@danielagarzoncuadros7727

@danielagarzoncuadros7727 2 жыл бұрын

Thankkksssss!!! Excelent video

@MegaTommy143 2 жыл бұрын

Hi Ridvan, How would this work with time series data? I want the estimation window to be the train data and event windows to be the test data.

@samirhajiyev6905

@samirhajiyev6905 3 жыл бұрын

excellent explanation

@ridvangedik 3 жыл бұрын

Thank you!

@siyaaggrey6014

@siyaaggrey6014 3 жыл бұрын

Thank you very much! This video has been very helpful

@ridvangedik 3 жыл бұрын

Glad it was helpful!

@siyaaggrey6014

@siyaaggrey6014 3 жыл бұрын

Thanks for the clear talk

@ridvangedik 3 жыл бұрын

You're welcome

@siyaaggrey6014

@siyaaggrey6014 3 жыл бұрын

@@ridvangedik Good day, Ridvan, do you mind meeting and chat about some data i tried to run but not getting satisfying results? Thanks

@amimridul4278 3 жыл бұрын

It's so easy to understand Thanks sir from Bangladesh

@ridvangedik 3 жыл бұрын

Thanks Ami! Salam to Bangladesh!

@analisecritica8722

@analisecritica8722 3 жыл бұрын

Hi, I didn't understand why the values in the model were zero for West and South (13:10). Could you explain better? If your explanation is, because West and South is not the reference category, then I ask: on which occasion do I multiply by 1 instead of zero? because the model summary never shows the reference category, it only shows the non-reference categories. So the multiplication will always be zero, it doesn't make sense.

@ridvangedik 3 жыл бұрын

Analise, If you have a row that indicates a West neighborhood, then you multiply the coefficient of NbhWest which is 2.09040 with 1 and use it on the right hand side of the equation. In this case, you will have to use 0 for NbhSouth. Similarly, if the entry is in the South neighborhood, you have to multiply its coefficient (0.86391) with 1 and 2.09040 with 0. So, the multiplications will only be zero for these two terms if the datapoint falls into the neighborhoods other than these two. Hope this helps.

@harshanidilrukshiperera9752

@harshanidilrukshiperera9752 3 жыл бұрын

The first video is great. But the second one not linking properly with the previous one by one. Some steps are not explained step by step. It is a little bit difficult to understand the flow.

@tronart1 3 жыл бұрын

Thanks so much! You made everything clear now!

@ridvangedik 3 жыл бұрын

You're welcome!

@absolutjackal 3 жыл бұрын

Dr. Gedik...Daniel from your current FSC class....at around 18:27 you mention grabbing the icon at the bottom left of the cell and dragging the formula down; you can also just double click the same symbol and it should auto fill the formulas as well. This was something I didn't know until recently but it has made my life in Excel much easier, especially when dealing with filling formulas down lots of rows. Thanks!

@ridvangedik 3 жыл бұрын

Hey Daniel, Very Happy to hear this:)