Remove Outliers from Data Set in R (Example) | Find, Detect & Delete Outlier Values | boxplot.stats

R code of this video:

x ＜- rnorm(1000)
x[1:5] ＜- c(7, 10, - 5, 16, - 23) # Insert outliers
x # Print data

boxplot(x) # Create boxplot of all data

length(x) - length(x_out_rm) # Count removed observations

boxplot(x_out_rm) # Create boxplot without outliers

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[t_thyme]

Herzlichen Dank!!! Step by step, concise, line of code with what it does ... a perfect example of what R tutorials should look like.

[agsoutas]

Thanks for the insight, Joachim. I am definitely going to deepen my understanding of this topic since I will be working on a relevant project.

[annisazulkifili]

Great help on my last minute assignment! Thank you so much

[ZeeNoorTrip]

thank u i have done the same way. and it works. except i remove the word stats after boxplot. and it works perfectly

[wildermanuel]

nice work dude, you help me in my exam

[hirunisilva]

Thank you for your explanation!

Can you tell me how to remove the outliers in a multi-column dataset? What I want to know is how to merge those columns after removing the outliers by column.

[alessandrorosati]

How is it possible to generate outliers uniformly in the p-parallelotope defined by the
coordinate-wise maxima and minima of the ‘regular’ observations in R?

[karolinagora]

Heyyy,
Looks like a great tip !! but...
I have a trouble to implement this code to my console, because an error pops up "Error in command 'h (simpleError (msg, call)'): error computing argument 'table' when selecting method for function '% in%': undefined columns selected"
I rewritten your code, I only changed the data .. I need some additional library or do you have any other idea? Please save me

[larissacury]

Hi, thank you! Do you know an equivalent function to rstatix::identify_outliers which allows two collumns at once?
obs: I know that this function allows group_by(), but it doens't solve my problem this time..

[idsfilm]

Thanks for the clear and concise tutorial, I am running into one problem however. When I use the code for removing the outliers, it changes my data (frame) to values, which stops me from making a box plot using qplot.

[galan]

So... what we do un a multivariant data?

[jeffreylin]

This is a very concise and useful video. I have a basic question. Do you believe it is appropriate to remove the outliers? I'm working on a research project and would like to remove the outliners from the boxplot for the purpose of better visualization. But, is it considered data manipulations?

[dalga]

Concise but very informative video! Thank you for this! I have a quick question if possible. Say I plotted some normalized values, and then I noticed one extreme outlier on the plot. In R, I would like to identify those extreme outliers in my data frame in order to check the value manually. How can I do that? I used a code(attached below) that listed all the outliers; however, I would like to only identify those outliers that are too far from the mean.
to compute the interquartile range: the difference between the firts and third quartile
quantile(QP2_Labanov_norm$duration_ms, 0.75) - quantile(QP2_Labanov_norm$duration_ms, 0.25)
Q1<-quantile(QP2_Labanov_norm$duration_ms, 0.25)
Q1#25% #46
Q2<-quantile(QP2_Labanov_norm$duration_ms, 0.75)
Q2#75% #69
< Q1
outlier_ind.1
QP2_Labanov_norm[outlier_ind, "duration_ms"

[ZeeNoorTrip]

Do you have any idea how do i remove outlier from all columns? For example if u take breast-cancer dataset?

[ZeeNoorTrip]

how can i do if i have non numeric values too. i mean i want to remove outlier of all data. can u please let me know

[NguyenQuyen-wgiv]

Thank you for your helpful video. I
Sorry if my questions seem silly. I have a data frame with the first column is tax code in text format and 5 variables (numeric). I don´t know how to remove all numeric outliers at once in this case. After removing outliers, how can I create/show the new data frame in table form and export it to excel? Could you please help me?

[sanjayverma-dmep]

what if we have multiple variables n all of their outliers ranges differently ?

[lebzgold]

How do you remove outliers in just a normal scatter plot?

[dalga]

Also, is it normal to see more outliers on a graph with normalized data vs another graph with non-normalized data?

[catarinaesteves]

Just a question, this did not worked for me, is it because you are using a univariate data and my data is multivariate? please help and thanks in advance