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Assignments for Computational Biology Fall 2021 at the University of Pittsburgh
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Difference between vector and list #57

Open egilfeather opened 3 years ago

egilfeather commented 3 years ago

What is the difference between shrooms_vector and shrooms_list? My understanding was that in R a vector and a list were the same thing.

https://github.com/brouwern/compbio2021/blob/4fc22d26cd66119a177fd9572bd409ffa989216d/KEY-MSA-walkthrough-shroom.Rmd#L569-L570

brouwern commented 3 years ago

This won’t be on the test, but a list is a collection of objects, typically vectors matrices and data frames, but just about anything else including function definitions I think . Lists aren’t vectors but they follow some of the same logic as vectors and some cases IIRC can be operated on or created in a vectoredized fashion, though I prefer loops because they are more transparent

Many things in R are vectors, but everything in R is an object.

On Mon, Oct 4, 2021 at 9:06 PM egilfeather @.***> wrote:

What is the difference between shrooms_vector and shrooms_list? My understanding was that in R a vector and a list were the same thing.

https://github.com/brouwern/compbio2021/blob/4fc22d26cd66119a177fd9572bd409ffa989216d/KEY-MSA-walkthrough-shroom.Rmd#L569-L570

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Department of Biological Sciences https://www.biology.pitt.edu/

University of Pittsburgh

Biostatistics course: brouwern.github.io/BIOSC_1120/index.html

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National Aviary, Dept. of Conservation & Field Research https://www.aviary.org/conservation

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spb64 commented 3 years ago

I believe that the main and most important difference is that vectors are one dimensional can only carry one type of data, such as numeral or character, while lists are able to carry multiple. For example, the shrooms_vector carries only the sequence information, while the shrooms_list has the associated accession number for each sequence.