Both:

data.frame("student"=c("John","Mary"),"id"=c(1,2))

AND

data.frame(student=c("John","Mary"),id=c(1,2))

give the desired result

In "Data Science Methodology", there are too many grammatical errors and answer errors in the reviews and exam for me to type out.

Before a class is published online, it should have at least passed a basic spell and grammar check. It looks unprofessional.

My suggestion is:

Use a spellchecker before you upload it online. Also, at least one person should go through the reviews and exams to check if everything "looks" okay.

I wanted this course to be supplemental material for my students. But the way it is now, I cannot suggest "Data Science Methodology" to them.

I am taking knowledge on Data Science Foundational DS0101, DS0103 and DS0105. Two of its total opened accurately but DS0105 is not opening.After click on this link its again navigating to the previous page.

I don't understand what the Review Questions in Module 5: Analyzing Hacked Passwords in R had to do with the subject matter of the Module. The first question asks which programming language is best for text analytics. R isn't even an option. It makes no sense. It wasn't covered in the module. Why even ask that?

Question 3 in module 1 in Data Analytics & Regression course is unclear.
I didn't get the question.

The course 'Watson Analytics for Social Media' is missing the final test

i want big data univ should draw a flow chart covering all course being offered so that learners can finish them scientifically one after another

It would be helpful to see in a course description what Learning Path(s) it is part of, if any.

How to start taking course- document the steps to start the course I am trying hard to take the course though no luck!

It would be great if I can perform hands-on-labs for Hadoop related courses on the cloud rather than have to download huge VMware images.

I have completed the first 3 modules of Data Science Methodology. The only resource I can find in these labs is what seems like a PowerPoint presentation in pdf that is based on something, but the something seems to be missing. I intuitively answered all but one of the review questions, but I definitely feel I'm missing relevant information because it is not provided.

Hello,

New design of your website is just awesome and I appreciate your efforts. But I would like to draw your attention that session of your website is not working properly.
- After logging in, when I go to select the courses it redirects me to the login page showing that you are not logged in.
- Even when I go to update my profile the same is happening with me.
It is really very frustrating. Please do something. I understand this is a beta version so I am just trying to help you.

Thank you

Noticed an error in the final exam question for the course "Machine Learning 101". The question is as follows:

k-fold cross validation creates a more consistent out-of-sample accuracy, where the splits are not necessarily distinct
True
False

I selected the option"True", but it was marked as not correct.When I went through the Model Evaluation video(Module 3) for the course, this particular topic was explained on slide 9 and according to the video , the correct answer is "True".

While taking the Final Exam for the course "Machine Learning 101" , I noticed an error in the 2nd last question:
Which of the following are types of supervised learning?
Both A and B
Regression
Clustering
Classification

The correct answers are Regression and Classification, but when I tried choosing either one , it was marked as the wrong answer.

It might be nice to 'autoplay' a module instead of having to click for the next video. Or possibly add a next arrow at the lower right of the video?