This is the only solution I could come up with, but I'm assuming there has to be a better way to do this:. Note: My vocabulary above may be off, so please correct me if so. I'm still learning the world of R.
Additionally, any explanation of what's going on here is appreciated i. I'm going to attempt to explain this without making any mistakes, but I'm betting this will attract a clarification or two in the comments. A data frame is a list. When you subset a data frame using the name of a column and [what you're getting is a sublist or a sub data frame.
If you want the actual atomic column, you could use [[or somewhat confusingly to me you could do aframe[,2] which returns a vector, not a sublist.
You do not need as. If you just use the extract operator it will work.Autostrade, conte: aspi faccia proposta vantaggiosa o sarà
Another advantage of using the '[[' operator is that it works both with data. So if the function has to be made running for both data. After searching stackoverflow and not finding an intuitive way to convert a 1 column dataframe into a list, I am now posting my first ever stackoverflow contribution:.
We can also convert data. All the solutions suggested so far require hardcoding column titles. This makes them non-generic imagine applying this to function arguments. Alternatively, you could, of course read the column names from the column first and then insert them in the code in the other solutions. Home r Convert data. There's now an easy way to do this using dplyr.
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I'm new to R, so i can't understand everything, but from what i have googled to the moment i see that the R parameter to that function needs to be a time-series-like object. Is there any way i can convert my array to a time-series object given that there might not be data for every date in a period only for the ones i specify?Ravelry giraffe pattern
Your DATE column may represent a date, but it is actually either a character, factor, integer, or a numeric vector. Finally, you can use the xts object to calculate returns and the Calmar ratio. Most people find working with the time series class to be a big pain. You should consider using the zoo class from package zoo. It will not complain about missing timesonly about duplicates.
The PerformanceAnalytics functions are almost certainly going to be expecting 'zoo' or its descendant class 'xts'. An alternative solution is to use the tidyquant package, which allows the functionality of the financial packages, including time series functionality, to be used with data frames.
The following examples shows how you can get the Calmar Ratio for multiple assets. The tidyquant vignettes go into more details on how to use the package. Whether you want to convert a data frame or any time series to a xts or zoo object, as in the answers above, or to any other time series such as a ts object the tsbox package makes coercion easy:.
Plot to illustrate the different output of the plot. Note, the base R ts method is mostly suited for quarterly or yearly data. As explained in an answer to "starting a daily time series in R" :. I will suggest you use the zoo library. Learn more. Convert data frame with date column to timeseries Ask Question.Bcd325p2 nxdn
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I want to create a vector out of a row of a data frame. But I don't want to have to row and column names.
How to Convert a Character to Numeric in R
I tried several things When you extract a single row from a data frame you get a one-row data frame. Convert it to a numeric vector:. As Roland suggests, unlist df[1,] will convert the one-row data frame to a numeric vector without dropping the names. Therefore unname unlist df[1,] is another, slightly more explicit way to get to the same result.Monster energy supercross the official videogame 3: ecco il nuoto
As Josh comments below, if you have a not-completely-numeric alphabetic, factor, mixed Columns of data frames are already vectors, you just have to pull them out. Note that you place the column you want after the comma, not before it:. Learn more. Convert a row of a data frame to vector Ask Question. Asked 7 years, 2 months ago.
Active 5 months ago. Viewed k times. Ben Bolker k 18 18 gold badges silver badges bronze badges. Joko Joko 1, 3 3 gold badges 12 12 silver badges 23 23 bronze badges. I suggest you format the data you've shown properly. Looks like you are missing some line breaks. I want a row.
Row '1' and not column 'a'.
Is there a way to apply this to all rows of a data frame and thereby merging all vectors to a single vector? Andri: That's working, though I could solve it differently too. Active Oldest Votes.
Convert Data Frame Column to Vector in R (3 Examples)
Convert it to a numeric vector: as.By Andrie de Vries, Joris Meys. Text in R is represented by character vectors. A character vector is — you guessed it! In the world of computer programming, text often is referred to as a string.
Here the word text refers to a single element of a vector, but you should be aware that the R Help files sometimes refer to strings and sometimes to text.
They mean the same thing. Take a look at how R uses character vectors to represent text. You assign some text to a character vector and get it to extract subsets of that data.
You also get familiar with the very powerful concept of named vectors, vectors in which each element has a name. This is useful because you can then refer to the elements by name as well as position. You test whether a variable is of class characterfor example, by using the is. Notice that x is a character vector of length 1. To find out how many characters are in the text, use nchar :.
This function tells you that x has length 1 and that the single element in x has 12 characters. To create a character vector with more than one element, use the combine function, c :. Notice that this time, R tells you that your vector has length 2 and that the first element has five characters and the second element has six characters.
With over 20 years of experience, he provides consulting and training services in the use of R. Related Book R For Dummies.Do you need more explanations? Before we can dive into the transformation of a character variable to numeric, we need to create an example character in R. Consider the following vector:. Now, we can continue with the important part — How to convert this character string to numeric? However, if you need some more explanations for the conversion of data types, you might have a look at the following video of my YouTube channel.
As you have seen, to convert a vector or variable with the character class to numeric is no problem. However, sometimes it makes sense to change all character columns of a data frame or matrix to numeric. With the following R code, you are able to recode all variables — no matter which variable class — of a data frame to numeric:.
However, in many situations it is better to convert only character columns to numeric i. You could do that with the following code in R:. Further examples needed?
The speaker discusses different data transformations from one data class to another. Your email address will not be published. Post Comment.
To be more precise, the tutorial contains this:. Our data frame contains two variables: x1 and x2. As you can see based on the output of the RStudio console, we stored the values of the column x1 in the vector object vec. This is probably the easiest solution, in case you want to convert a data frame column to a vector in R. However, there are several other alternatives…. Another way for the conversion of a variable to a vector is provided by the dplyr R package. Do you want to learn more about converting data frame columns in R?
Convert data.frame column to a vector?
Then you might watch the following video of my YouTube channel. In the video, I show the R programming syntax of this tutorial. Furthermore, you might have a look at the related tutorials on statisticsglobe. You can find some articles about data conversion and related topics below. In this R tutorial you learned how to use a data frame column as vector.
Your email address will not be published. Post Comment. Subscribe to my free statistics newsletter. Leave a Reply Cancel reply Your email address will not be published.
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I do not understand the behaviour of as. Maybe somebody could give me an explanation for the last 2 output lines and the correct approach? Thanks a lot. I want to use lre in order to detect consecutive occurrences of values in a row of a data frame with columns of different data types.
Problem: lre requires a vector, vectors require a definite data type integer, character, factor, My idea here is to turn the data frame row into a character vector to avoid data loss through conversion.
When you create a data frame the default is that characters are factors. You can see this clearly if you select a column. You should also look at this question: How to convert a data frame column to numeric type? Learn more. R: Turning a data frame row into a character vector Ask Question. Asked 5 years, 9 months ago.
Active 5 years, 9 months ago.
How to Create Character Vectors for Text Data in R
Viewed 24k times. Short version: I do not understand the behaviour of as. Active Oldest Votes. Your data frame columns aren't characters they are factors. Thank you!
I guess have to take some lessons in data types.
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