Displaying 20 results from an estimated 4000 matches similar to: "Fitting data and removing outliers"
2012 Jul 16
2
Combining Data Frames
I have 2 data tables. Each hold information categorized into "Date" and "Price." What I need to do is combine the two to get 2 columns of "Date" and "Price," by continuing the table downwards with the new rows supplied from the second table. So, for example I have
5/1/12 2
5/2/12 5
As data table 1 and
5/3/12 65
5/4/12 7
As data table 2 and I need to create
2012 Jul 12
1
Grabbing Indexes of a certain standard deviation
I have a graph of residuals and I am attempting to get a list of the indexes
of each time the residual is greater than 2 standard deviations or less than
-2 standard deviations, but only the first point of the section. And then
I'd also need the first point where the point returns to the range between
+/- 2 standard deviations.
So basically if my standard deviation=1 and my residuals=c(1, 2.1,
2009 Aug 19
2
mild and extreme outliers in boxplot
dear all,
could somebody tell me how I can plot mild outliers as a circle(?) and
extreme outliers as an asterisk(*) in a box-whisker plot?
Thanks very much in advance
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2003 Feb 20
3
outliers/interval data extraction
Dear R-users,
I have two outliers related questions.
I.
I have a vector consisting of 69 values.
mean = 0.00086
SD = 0.02152
The shape of EDA graphics (boxplots, density plots) is heavily distorted
due to outliers. How to define the interval for outliers exception? Is
<2SD - mean + 2SD> interval a correct approach?
Or should I define 95% (or 99%) limit of agreement for data interval,
2007 Feb 12
6
Boxplot: quartiles/outliers
For boxplot(), is it possible to pass in a parameter to change the default
way that the 1st and 3rd quartiles are computed? (specifically, I'd like to
use type 6 described in the quantile function).
Also, what are the options for how outliers are computed, and how can one
change them?
Thank you
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2002 Nov 26
4
how to identify the outliers
Hello R-users,
Is there any more sophisticated way how to identify the dataset
outliers other then seeing them in boxplot? I wanna exclude them from
further analysis and I am interested in their position in my vector
data.
Rado
--
Radoslav Bonk M.S.
Dept. of Physical Geography and Geoecology
Faculty of Sciences, Comenius University
Mlynska Dolina 842 15, Bratislava, SLOVAKIA
tel: +421 2 602
2010 Jan 19
5
How to detect and exclude outliers in R?
Suppose I am reading data from a file and the data contains some outliers. I
want to know if it is possible in R to automatically detect outliers in a
dataset and remove them
--
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2011 Dec 30
3
good method of removing outliers?
Happy holidays all!
I know it's very subjective to determine whether some data is outlier or
not...
But are there reasonally good and realistic methods of identifying outliers
in R?
Thanks a lot!
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2011 Oct 20
2
How to remove multiple outliers
Hi All,
I am working on the dataset in which some of the variables have more than
one observations with outliers .
I am using below mentioned sample script
library(outliers)
x1 <- c(10, 10, 11, 12, 13, 14, 14, 10, 11, 13, 12, 13, 10, 19, 18, 17,
10099, 10099, 10098)
outlier_tf1 = outlier(x1,logical=TRUE)
find_outlier1 = which(outlier_tf1==TRUE, arr.ind=TRUE)
beh_input_ro1 =
2008 Sep 02
3
boxplot - label outliers
Hi All-
I have 24 boxplots on one graph. I do not have the whiskers extending
to the outliers, but I would like to label the maximum value of each
outlier above the whiskers. I have the stats but am having trouble
figuring out how to label the whiskers.
Any suggestions would be great!
sherri
2005 Aug 08
2
selecting outliers
Hi everybody,
I'd like to know if there's an easy way for extracting
outliers record from a dataset, in order to perform
further analysis on them.
Thanks
Alessandro
2018 May 10
3
Anuncio: paquete outliers
Estimados colegas:
Entiendo que este buzón es el adecuado (me disculpan si no es así) para dar a conocer el siguiente paquete de R:
*MUOD (outliers)*
luisfo/muod.outliers
| | |
luisfo/muod.outliers
|
El paquete, tal y como se indica, está respaldado por un paper que hemos publicado recientemente en Scientific Reports. Detecta outliers en datos multidimensionales usando 'function
2012 May 15
2
how to find outliers from the list of values
Hi,
I am new to R and I would like to get your help in finding
'outliers'.
I have mvoutlier package installed in my system and added the package .
But I not able find a function from 'mvoutlier' package which will identify
'outliers'.
This is the sample list of data I have got which has one out-lier.
11489 11008 11873 80000000 9558 8645 8024 8371 It will
2014 Jul 11
3
outliers
Hola!
Quiero encontrar los outliers de una columna de datos que son diferencias
de tiempo, aunque esta en formato numero no en horas.
El paquete que encontre que me podria servir es el outliers e hice este
script:
library(outliers)
filename<-"timediff.csv"
time<-read.csv(filename, sep=";",header=TRUE,dec=",")
chisq.out.test(time$TimeDiff)
Pero me da error
2011 Sep 28
1
removing outliers in non-normal distributions
Hello,
I'm seeking ideas on how to remove outliers from a non-normal distribution
predictor variable. We wish to reset points deemed outliers to a truncated
value that is less extreme. (I've seen many posts requesting outlier removal
systems. It seems like most of the replies center around "why do you want to
remove them", "you shouldn't remove them", "it
2012 Aug 01
3
Outliers en una serie de tiempo
Buenas noches.Soy principiante de R, necesito por favor detectar outliers en una serie de tiempo.
Muchas gracias
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2016 Apr 07
1
identifying outliers
Thanks for writing this great piece of code.
x = rnorm(100)
boxplot(x) # you shouldn't see any outliers here although sometimes yow will
# lets add some outliers intentionally
x = c(21, 20, 25, x) # now 10, 15 and 20 are outliers
myboxplot <- boxplot(x) # now you should see your three outliers
myboxplot$out # it will print the values of the outliers
How does one amend
2009 Dec 27
2
Identifying outliers in non-normally distributed data
Hello,
I've been searching for a method for identify outliers for quite some
time now. The complication is that I cannot assume that my data is
normally distributed nor symmetrical (i.e. some distributions might
have one longer tail) so I have not been able to find any good tests.
The Walsh's Test (http://www.statistics4u.info/
fundsta...liertest.html#), as I understand assumes that the
2009 Jun 16
1
How to replace outliers by group median?
Dear R-helpers,
Very small amount of outliers can greatly affect the mean and many other
statistic of a numeric variable. So, usually we must deal with the outliers
properly in the process of data analysis. Here, I want to replace outliers
with the group median of the variable. But, I can not construct a good way
to do that efficiently, because of I am a newbie to R and programming.
Can anybody
2013 Apr 12
2
Stat question: How to deal w/ negative outliers?
Hello all,
I have a question: I am using the interquantile method to spot outliers &
it gives me values of say 234 & -120 or for the higher & lower benchmarks.
I don't have any issues w/ the higher end. However I don't have any
negative values. My lowest possible value is 0. Should I consider 0 as an
outlier?
Thanks ahead for your thoughts
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