outliers | Find outliers in a dataset | Predictive Analytics library
kandi X-RAY | outliers Summary
kandi X-RAY | outliers Summary
Find outliers in a dataset.
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Trending Discussions on outliers
QUESTION
I am using a method to remove univariate outliers. This method only works if the vector contains outliers.
How is it possible to generalize this method to work also with vectors without outliers. I tried with ifelse
without success.
ANSWER
Answered 2021-Jun-15 at 19:58Negate (!
) instead of using -
which would work even when there are no outliers
QUESTION
I have written a function that draws random variates from a normal distribution with outliers. However I now want to take the mean of this data and append it to an empty vector 1000 times (so essentially a vector with 1000 different means using my function) Here is my attempt so so far.
...ANSWER
Answered 2021-Jun-13 at 15:41There are a few ways of doing this. If you want to use a loop, the trick is to define an empty vector before initiating the loop, and store values in that. Here's an example using rnorm
to generate values from a standard normal, since I don't have the code for your rnormout
function:
QUESTION
I want to remove outliers from a variable MEASURE after grouping by TYPE. I tried the following code but it didn't work. I've searched and I've only came across how to remove outliers for the whole dataframe or one column. But not by after grouping.
...ANSWER
Answered 2021-Jun-13 at 02:28You can use boxplot.stats
to get outlier values in each group and use filter
to remove them.
QUESTION
I have the following dataframe and then a calculation to identify outliers:
...ANSWER
Answered 2021-Jun-12 at 13:38Groupby.filter
: retains those groups of Day
s that have their Flag
s all
True:
QUESTION
I have a .csv of species occurrences with individual lat-long points, but I am trying to aggregate them all into a singular 'average' coordinate point per species. From some digging I see there can be issues with a simple average (high altitude or low altitude outliers can cause issues). Does anyone have a suggestion on how to do this easily/quickly in R? Thanks
Data is seen up like this but I have 71,000+ occurrences total.
species longitude latitude Abies amabilis -111.112964 41.199112 Abies arizonica -110.8678 37.0349 Abies bifolia -111.650833 41.82 Abies bifolia -113.377722 41.950833 ...ANSWER
Answered 2021-Jun-10 at 14:20Using
QUESTION
I have this dataset:
...ANSWER
Answered 2021-Jun-09 at 03:41You can try the following -
QUESTION
Im trying to remove outliers using numpy (without using pandas). I have an array I created who looks like this:
...ANSWER
Answered 2021-Jun-03 at 16:09You should not use loops when you work with numpy. You need np.where
, which is the numpy's combined equivalent of for
and if
:
QUESTION
Relatively new to Dash, and this is a problem that has been vexing me for months now. I am making a multi-page app that shows some basic data trends using cards, and graphs embedded within cardbody. 30% of the time, the app works well without any errors and the other 70% it throws either one of the following:
- ImportError: cannot import name 'ValidatorCache' from partially initialized module 'plotly.validator_cache' (most likely due to a circular import) OR
- ImportError: cannot import name 'Layout' from partially initialized module 'plotly.graph_objects' (most likely due to a circular import)
Both these appear quite randomly and I usually refresh the app to make them go away. But obviously I am doing something wrong. I have a set of dropdowns that trigger callbacks on graphs. I have been wracking my head about this. Any help/leads would be appreciated. The only pattern I see in the errors is they seem to emerge when the plotly express graphs are being called in the callbacks.
What am I doing wrong? I have searched all over online for help but nothing yet.
Sharing with some relevant snippets of code (this may be too long and many parts not important to the question, but to give you a general idea of what I have been working towards)
...ANSWER
Answered 2021-Feb-13 at 02:18Well, it appears I may have stumbled on to an answer. I was using the pretty much the same inputs for multiple callbacks and that could have been causing some interference with the sequencing of inputs. Once I integrated the code into one callback with multiple outputs, the problem seems to have disappeared.
QUESTION
I can't figure out why my loop isn't working.
I have a database (36rows x 51columns, its name is "Seleccio") consisting of 3 factors (first 3 columns: Animal (12 animals), Diet (3 diets) and Period (3 periods)) and 48 variables (many clinical parameters) with 36 observations per column. It is a 3x3 crossover design so I want to implement a mixed model to include the Animal random effect and also Period and Diet fixed effects and the interaction between them.
A sample of the data (but with less rows and columns):
...ANSWER
Answered 2021-May-31 at 15:44I don't think i can run the model with only 6 observations, so i couldn't find why would your loop doesn't return the same as doing it one by one. Maybe the problem is with cat(colnames(Seleccio)[i])
: you only want the Var names, and for i=1, 2 and 3, that code will return "Animal", "Diet" and "Period", thus messing up how you're comparing the results. Using cat(colnames(vars)[i])
might correct that. If you find a way to include more observations of Seleccio
i might be able to help more.
I would suggest you to create a list to store the output:
QUESTION
I am reading an image, getting objects that have a certain brightness value, and then plotting the X and Y coords to the image.
But, there is a huge group of outliers, which are all located in a rectangular part of the image, Its X and Y coords are 1110-1977 (width) and 1069-1905 (height). From here, I'm looping through this little square portion of the image, and from my pre-created x and y arrays any values that have the same coords as shown there are removed.
However, this removes a lot more coords, which, for example, have X in the range 1110-1977. So the end result is a cross pattern filtering when I only want the square in the center to be filtered. How would I do this?
Code
...ANSWER
Answered 2021-May-25 at 02:35Your post-processing logic is flawed. You remove a bunch of X values in the range 1110-1977, without checking whether its corresponding Y value is also in the range of the box. Remove this code section instead and add that logic the first time you loop to gather your x and y coords.
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