weighted Questions
13
Solved
Is there a way to use the numpy.percentile function to compute weighted percentile? Or is anyone aware of an alternative python function to compute weighted percentile?
Wheatear asked 18/2, 2014 at 3:55
6
Solved
I have a time series x_0 ... x_t. I would like to compute the exponentially weighted variance of the data. That is:
V = SUM{w_i*(x_i - x_bar)^2, i=1 to T} where SUM{w_i} = 1 and x_bar=SUM{w_i*x_i}...
Iover asked 6/4, 2012 at 21:20
6
Solved
In R I want to allocate projects to people based on their rank preferences but also their performance. Say I have 5 projects and 3 people. In this case, all three people want project A because it's...
5
Solved
Lets assume:
List<element> which element is:
public class Element {
int Weight { get; set; }
}
What I want to achieve is, select an element randomly by the weight.
For example:
Element_1.We...
Horrified asked 4/2, 2012 at 14:34
7
Solved
numpy.average() has a weights option, but numpy.std() does not. Does anyone have suggestions for a workaround?
Belgravia asked 9/3, 2010 at 23:53
6
Given a list of probabilities like:
P = [0.10, 0.25, 0.60, 0.05]
(I can ensure that the sum of all the variables in P is always 1)
How can I write a function that randomly returns a valid index, a...
Cutlery asked 14/12, 2010 at 8:34
1
Solved
I have an old linear model which I wish to improve using XGBoost. I have the predictions from the old model, which I wish to use as a base margin. Also, due to the nature of what I'm modeling, I ne...
Unsphere asked 6/6, 2022 at 18:27
3
Solved
I need to obtain a random sample from an ElasticSearch index, i.e. to issue a query that retrieves some documents from a given index with weighted probability Wj/ΣWi (where Wj is a weight of row j ...
Sporocyte asked 7/12, 2015 at 7:54
2
Solved
6
Solved
I need to calculate the frequency of individuals by age and marital status so normally I'd use:
table(age, marital_status)
However each individual has a different weight after the sampling of t...
Digress asked 3/9, 2013 at 6:57
1
Solved
I want to do a linear regression applying survey weights in R studio. I have seen that it is possible to do this with the lm() function, which enables me to specify the weights I want to use. Howev...
Holzer asked 27/9, 2020 at 15:8
1
Solved
I want to calculate (weighted) logistic regression in Python. The weights were calculated to adjust the distribution of the sample regarding the population. However, the results don´t change if I u...
Anxiety asked 5/7, 2020 at 15:2
3
Solved
What is a good algorithm that shuffles an array or arrays using weights from the nested arrays?
Example:
$array = array(
array("name"=>"John", "rank"=>3),
array("name"=>"Bob", "rank"=&...
1
Solved
I have been running a Rails site for a couple of years and some articles are being pulled from the DB based on a weight field. The data structure is:
{name: 'Content Piece 1', weight: 50}
{name: '...
Augend asked 15/7, 2019 at 16:30
6
Solved
I have a program where I'm keeping track of the success of various things using collections.Counter — each success of a thing increments the corresponding counter:
import collections
scoreboard = ...
1
Solved
How can I calculate the weighted coefficient of variation (CV) over a NumPy array in Python? It's okay to use any popular third-party Python package for this purpose.
I can calculate the CV using ...
Rattlepate asked 12/12, 2018 at 17:41
2
Solved
I'm performing weighted search on a series of items in an e-commerce platform. The problem I have is ts_rank is giving me the exact same value for different combinations of words, even if the ts_ve...
Appointive asked 20/4, 2016 at 9:19
2
I want to set the same weight for parts of positive samples. However,tf.nn.weighted_cross_entropy_with_logits can only set the weight for all positive samples in my opinion.
for example, in the c...
Carson asked 16/3, 2018 at 3:44
2
Solved
Per https://stackoverflow.com/a/48981834/1840471, this is an implementation of the weighted Gini coefficient in Python:
import numpy as np
def gini(x, weights=None):
if weights is None:
weights ...
1
Solved
I am preparing a plot using ggplot2, and I want to add a trendline that is based on a weighted least squares estimation.
In base graphics this can be done by sending a WLS model to abline:
mod0 ...
4
I have an array of doubles and I want to select a value from it with the probability of each value being selected being inversely proportional to its value. For example:
arr[0] = 100
arr[1] = 200
...
2
Solved
I'm trying to calculate the weighted mean for multiple columns using dplyr. at the moment I'm stuck with summarize_each which to me seems to be part of the solution. here's some example code:
libr...
1
Solved
In a Fortran program I would like to choose at random a specific variable (specifically its index) by using weights. The weights would be provided in a separate vector (element 1 would contain weig...
4
Solved
I am trying to write a program to select a random name from the US Census last name list. The list format is
Name Weight Cumulative line
----- ----- ----- -
SMITH 1.006 1.006 1
JOHNSON 0.810 1.816...
Executant asked 9/9, 2011 at 20:1
6
Solved
Way way back (think 20+ years) I encountered a Gomoku game source code in a magazine that I typed in for my computer and had a lot of fun with.
The game was difficult to win against, but the core ...
Adventitious asked 2/5, 2010 at 12:8
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