Top "Mean" questions

The arithmetic mean (or simply the mean or average when the context is clear) is the central tendency of a collection of numbers.

Add a row with means of columns to pandas DataFrame

I have a pandas DataFrame consisting of some sensor readings taken over time like this: diode1 diode2 diode3 diode4 Time 0.530 7 0 10 16 1.218 17 7 14 19 1.895 13 8 16 17 2.570 8 2 16 17 3.240 14 8 17 19 3.910 13 6 17 18 4.594 13 5 16 19 5.265 9 0 12 16 5.948 12 3 16 17 6.632 10 2 15 17 …

python pandas dataframe mean
How to get the average of two columns using dplyr?

how to get the average of two columns of a data table using dplyr? For example, if my data if …

r dplyr mean
In R, how do I compute mean and standard error of a subset of data, grouped by multiple columns, and output this into a new data frame?

I have a dataset (named 'gala') that has the columns "Day", "Tree", "Trt", and "LogColumn". The data was collected over …

r dataframe grouping mean standard-error
Get mean of 2D slice of a 3D array in numpy

I have a numpy array with a shape of: (11L, 5L, 5L) I want to calculate the mean over the 25 …

arrays numpy multidimensional-array slice mean
z-Scores(standard deviation and mean) in PHP

I am trying to calculate Z-scores using PHP. Essentially, I am looking for the most efficient way to calculate the …

php mean standard-deviation
Summarize data.table by group

I am working with a huge data table in R containing monthly measurements of temperature for multiple locations, taken by …

r data.table aggregate mean
Angular 5 : Property 'then' does not exist on type 'Observable<any>'

I got this error message "[ts] Property 'then' does not exist on type 'Observable'.", how to solve it? This is …

angular mean
Subtract every column in dataframe with the mean of that column with Python

I am looking for a way to find means of each column in a python dataframe and subtract that column …

python python-2.7 mean centering
Find mean of non-zero elements

I am assuming that the mean fucntion takes a matrix and calculate its mean by suming all element of the …

matlab mean
Datetime objects with pandas mean function

I am new to programming so I apologize in advance if this question does not make any sens. I noticed …

python datetime pandas mean