We help IT Professionals succeed at work.

Vector, list Questions R

312 Views
Last Modified: 2017-03-11
Hey all,
I am trying to get my feet wet in R programming for statistical analysis. '

Can anyone of you, tell me what is the basic differences and similarities between a list and vector, in a simple  layman’s terms…
What is a  data frames?

Thank you
Comment
Watch Question

Database Developer & Administrator
CERTIFIED EXPERT
Most Valuable Expert 2011
Top Expert 2012
Commented:
This problem has been solved!
(Unlock this solution with a 7-day Free Trial)
UNLOCK SOLUTION

Author

Commented:
Thank you sdstuber :)

Author

Commented:
thank you. this explains it crystal clear

Author

Commented:
thank you again. Now I am to totally understand the complex code that I am currently dealing with. You are a lifesaver, sent from heaven. Thank you a million
CERTIFIED EXPERT
Top Expert 2016

Commented:
to add to above solution:

a vector is an array, i. e. all the elements are contiguous in memory and easily can be indexed by a counter from 0 to n-1 where n is the number of elements.

a list unlike to a vector is a collection of nodes. each node contains exactly 1 list element and points backwards to a predecessor node (beside of the first node) and forward to a successor node (beside of the last node of a list). a list fastly could be grow as adding a new node only requires a maximum of two nodes to be updated while in a vector you might have to move a good part of the array or even use new bigger contiguous space when the array grows. in R lists might have elements of different type what often is the main advantage of a list especially when you deal with a small number of elements.

a dataframe is a list of column vectors as explained by ststuber.

Sara

Author

Commented:
Awesome, thank you Sara. this is very useful to understand :)

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions