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Questions - dataframe

What is the purpose of "r" before "..." in DataFrames.jl

I noticed people using r"..". What is it for? thanks
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siebenstein

dataframe

julia

Votes: 0

Answers: 2

Latest Answer

r"..." is Julia syntax for defining a regular expression, and is used throughout the language (not just in data frames) whenever a regexp is needed. You can find more information about this ...
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cbk

Function is only performed for the last iteration in a while loop

I have a program that analyzes fish behavior and categorizes it, giving each behavior a number between 1-80. Then, my code groups the frames in which their behaviors took place for at least 50 seconds...
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Chris

python

pandas

dataframe

loops

Votes: 0

Answers: 1

Latest Answer

I figured it out. The issues was in where I had the except. I was essentially telling it to iterate through the list, and at the end of the list then run the function. Here is the fixed code: for ro i...
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Chris

Find mean of counts within groups

I have a dataframe that looks like this: library(tidyverse) x <- tibble( batch = rep(c(1,2), each=10), exp_id = c(rep('a',3),rep('b',2),rep('c',5),rep('d',6),rep('e',4)) ) I can run the...
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Adam_G

r

dataframe

dplyr

summarize

Votes: 0

Answers: 2

Latest Answer

library(dplyr) group_by(x, batch) %>% summarize(avg_exp = mean(table(exp_id))) # # A tibble: 2 x 2 # batch avg_exp # <dbl> <dbl> # 1 1 3.33 # 2 2 5
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r2evans

How to refer to non-standard column names in DataFrames.jl

I have a data table containing some columns that have spaces in their names. How I can reference these columns by name (e.g. Column 1) if I want to select just that column of the dataframe? I tried da...
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siebenstein

dataframe

julia

Votes: 0

Answers: 1

Latest Answer

The DataFrames manual mentions the many ways of indexing available. For eg. julia> df."Column 1" 5-element Vector{Int64}: 1 2 3 4 5 julia> df[!, "Column 1"] 5-element ...
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Sundar R

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