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.

Mean value and standard deviation of a very huge data set

I am wondering if there is an algorithm that calculates the mean value and standard deviation of an unbound data …

algorithm statistics mean numerics large-data
How to use numpy with 'None' value in Python?

I'd like to calculate the mean of an array in Python in this form: Matrice = [1, 2, None] I'd just like to …

python numpy mean
How to get the mean of rows of a matrix in Octave?

>> a = [2,3,4;6,7,8] a = 2 3 4 6 7 8 >> mean(a) ans = 4 5 6 where [4 5 6] is the mean for each column How can I get …

matrix octave mean
How to get column mean for specific rows only?

I need to get the mean of one column (here: score) for specific rows (here: years). Specifically, I would like …

r dataframe mean
Getting error suddenly in Angular Error: NodeInjector: NOT_FOUND [ControlContainer]

core.js:5873 ERROR Error: NodeInjector: NOT_FOUND [ControlContainer]. Sometime when i restart the project it runs perfectly. there are only …

angular mean-stack mean
means and SD for columns in a dataframe with NA values

I'm trying to calculate the mean and standard deviation of several columns (except the first column) in a data.frame …

r mean sapply standard-deviation
How to catch the error when inserting a MongoDB document which violates an unique index?

I'm building a MEAN app. This is my Username schema, the username should be unique. var mongoose = require('mongoose'); var …

javascript mongodb express mongoose mean
Conditional mean over a Pandas DataFrame

I have a dataset from which I want a few averages of multiple variables I created. I started off with: …

python pandas mean nan
trying to install bcrypt into node project + node set up issues

I have seen some very similar questions but none that I have found seem to work. I am trying to …

node.js npm mean
R - min, max and mean of off-diagonal elements in a matrix

I have like a matrix in R and I want to get: Max off - diagonal elements Min off – diagonal …

r sum mean