(Now updated with dplyr examples.)
Kid A and B are ‘Unlike today’s internet of information, a Blockchain does not send a “copy” of the digital lunches to kids A and B. Kid A says to Kid B: ‘I’ll trade you lunch if you have a cookie’. #> [8] 1.2247449 1.4142136#> [1] "other" "robot" "robot" "large" "other" "other" "other" "robot" "other" In a previous post, you covered part of the R language control flow, the cycles or loop structures.In a subsequent one, you learned more about how to avoid looping by using the apply() family of functions, which act on compound data in repetitive ways.
The CASE statement provide an elegant way to test values. In 1990, the defendant, referred to in the judgment only as R to protect the identity of the victim, had been convicted of attempting to rape his wife. Some examples include:The point is, the Blockchain industry is a completely level playing field right now because the technology is still so new. #> [55] "other" "other" "other" "other" "other" "other" "other" "other" "other" #> [46] "46" "47" "48" "49" "50"#> [1] NA NA NA NA "fizz" NA "buzz" NA NA "fizz" If it is supplied, then each entry that matches "" will be replaced
With great power comes not only great responsibility, but often great complexity — and that sure can be the case with R. The open-source R Project for Statistical Computing, a programmingIf you're not even at the stage where you feel comfortable doing rudimentary tasks in R, we recommend you head right over to Computerworld's I've created a sample data set with three years of revenue and profit data from Apple, Google and Microsoft, looking at how the companies performed shortly after the 2008-09 "Great Recession." ===== To Dason, didn't know about the findInterval. #> [41] "41" "buzz" "43" "44" "fizz" "46" "47" "48" "buzz" "fizz"#> [1] NA NA NA NA 5 NA 7 NA NA 5 NA NA NA 7 5 NA NA NA NA 5 7 NA NA NA 5 tidyverse. #> [31] "31" "32" "33" "34" NA "36" "37" "38" "39" "fizz" #> Biggs Darklighter 183 84 masculine Human other )If you run the str() function on the data frame to see its structure, you'll see that the year is being treated as a number and not as a year or factor:I may want to group my data by year, but don't think I'm going to be doing specific time-based analysis, so I'll turn the fy column of numbers into a column that contains R categories (called factors) instead of dates with the following command:Throughout the course of this tutorial, I'll also show how to accomplish these tasks using packages in the so-called "tidyverse" — an ecosystem initially championed by RStudio Chief Scientist Hadley Wickham and now backed by a number of open-source authors both within and outside of RStudio.For creating ordered factors, the tidyverse forcats package has several options, including IDG’s Sharon Machlis demonstrates how to use tidyr’s new pivot_longer and pivot_wider functions. #> Leia Organa 150 49 feminine Human other #> [16] "16" "17" "18" "19" "20" "21" "22" "23" "24" "25" "26" "27" "28" "29" "30"
R is mighty, but it can be complex for data tasks.
October 26, 2017, 10:52pm #1. #> Owen Lars 178 120 masculine Human other #> [31] "31" "32" "33" "34" "fizz buzz" "36" #> [25] "fizz" "26" "27" "buzz" "29" "fizz"
Two kids want to trade lunches. Anything that requires multiple parties to provide authenticity can benefit from a Blockchain solution.
However, if you're looking for an easy, elegant way to do this now, skip to Syntax 5 and the dplyr package.Simply create a variable name for the new column and pass in a calculation formula as its value if, for example, you want a new column that's the sum of two existing columns:As you can probably guess, this creates a new column called "newColumn" with the sum of oldColumn1 + oldColumn2 in each row.For our sample data frame called data, we could add a column for profit margin by dividing profit by revenue and then multiplying by 100:Whoa — that's a lot of decimal places in the new margin column.We can round that off to just one decimal place with the round() function; round() takes the format:So, to round the margin column to one decimal place: #> [11] NA NA NA "buzz" "fizz" NA NA NA NA "fizz" #> [37] "37" "38" "39" "fizz" "41" "buzz" Doesn't work with any of the other arguments except unique_sep, empty_fill, prefix and postfix.
#> [73] "other" "other" "other" "other" "large" "large" "other" "other" "large"
#> [19] "19" "fizz" "buzz" "22" "23" "24" You'll notice there's a link at both locations to the other and I've told everyone what I'm doing an why. Nov 24, 2012 #8. Today anyone can type a website address into a computer or smartphone web browser and retrieve information in a matter of seconds.