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R Questions & Answers

Browse 123 R questions and answers from learners and industry experts. Find practical fixes, interview prep and step-by-step solutions - or ask your own.

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R - Markdown avoiding package loading messages

I have been using Knitr via R-Studio, and think it is pretty neat. I have a minor issue though. When I source a file in an R-Chunk, the knitr output…

Data Science · R

1 Answer · 2.2K Views · Answered ✓

Asked by: Kaneko Takeda · 5 years ago

MySQL Query GROUP BY day / month / year

Is it possible I make a simple query to count how many records I have in a determined period of time like a Year, month or day, having a TIMESTAMP…

Data Science · R

1 Answer · 3.5K Views · Answered ✓

Asked by: Ranjana Admin · 5 years ago

Returning multiple objects in an R function

How can I return multiple objects in an R function? In Java, I would make a Class, maybe Person which has some private variables and encapsulates,…

Data Science · R

2 Answers · 2.4K Views · Answered ✓

Asked by: Julian Springer · 5 years ago

How does Dijkstra's Algorithm and A-Star compare?

How is the Dijkstra algorithm differ from the A* algorithm as they seem to be similar to me? What are the pros and cons of Dijkstra’s algorithm and…

Data Science · R

1 Answer · 1 Views · Answered ✓

Asked by: Naveen Sharma · 5 years ago

How to fix the Error: Bootstrap tooltips require Tether

I'm using Bootstrap V4 and the following error is logged in the console;Error: Bootstrap tooltips require Tether I have tried to remove the error by…

Data Science · R

1 Answer · 1 Views · Answered ✓

Asked by: Colin Payne · 5 years ago

ValueError: Must pass DataFrame with boolean values only

In this data file, the United States is broken up into four regions using the "REGION" column.Create a query that finds the counties that belong to…

Data Science · R

1 Answer · 1.7K Views · Answered ✓

Asked by: Diane Carr · 5 years ago

input() error - NameError: name '…' is not defined

I am getting an error when I try to run this simple python script:input_variable = input ("Enter your name: ")print ("your name is" +…

Data Science · R

1 Answer · 2.9K Views · Answered ✓

Asked by: Fukuda Ashikaga · 5 years ago

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