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Questions tagged [geometric-mean]

A mean that calculates the n-th root of the product of the numbers.

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Geometric mean filter for denoising image in MATLAB

I am new to MATLAB. I don't know how to use geometric mean filter for filtering noisy image. For arithmetic mean filter I use this: H = fspecial('average',5); a = imfilter(a, H); Is there any similar way for geometric mean filter?
yld
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How to skip NA when applying geometric-mean function

I have the following data frame: 1 8.03 0.37 0.55 1.03 1.58 2.03 15.08 2.69 1.63 3.84 1.26 1.9692516 2 4.76 0.70 NA 0.12 1.62 3.30 3.24 2.92 0.35 0.49 0.42 NA 3 6.18 3.47 …
Tim Tran
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proper syntax for calculating geomtric mean of rasters in r?

Is there a way to perform geometric mean over rasters in r while accounting for NA's? Will the code below suffice? Was exploring methods for doing this iteratively using list.files, a forloop and a stack, but for now this will be…
user11057680
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How to group dataframe and calculate geomean?

I have a df with a column with dates (data) and column with average daily change of price (DailyChange) and I need to group this df by year and for each year count the geometric mean from column DailyChange. This is the part of the code : df =…
Jiri
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Standard error of geometric mean of values in Pandas after groupby

I have a pandas dataframe with time col (Week) and a value col (Impressions). I want to find the geometric mean and standard error of the Impressions col, grouped by per week. The caveat over here is, that many Impression values are zero. After…
pandi20
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Binary Search using Geometric Means

Background: When doing a binary search on an array, we initialise an upper h and lower l bound and test the mid-point (the arithmetic mean) half-way between them m := (h+l)/2. Then we either change the upper or lower bound and iterate to…
mattapow
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Calculation of geometric fold error calculation in R

Hi I have created a dummy data set, I want to calculate geometric mean fold error between the obs/pred values of the model in R. Kindly help thanks a=c(1,2,4,2,5,6,3,2,6,8,10,4) b=c(1.3,3.2,4.4,2.5,1.6,4.5,5.5,2.2,3.1,6.4,3.0,6.3) n=…
Raja
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How to run scipy.stats.gmean for rows contanining values less than 1 and zeros?

We have the following dataframe (df) print(df) #Gene GSM772 GSM773 GSM774 GSM775 GSM776 0610007P14Rik 0.003485 0.003415 0.005431 0.003667 0.007146 0610009B22Rik 0.001220 0.001351 0.001762 0.001404 …
TraPS-VarI
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Oracle SQL lag function with partition

I have a table which contains year, month, period, region_code, item_code, current_price columns in a mixed order as shown…
ince
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How to calculate the sum of geometric series

I want to calculate the sum of a geometric series. ie: 1 , 5 , 25 , 125 , etc I try to use the math formula to calculate it: a(r^n -1)/(r-1) My code: int a = 1; int r = 5; int deno = r -1; int n = 3 int rn = r^n -1 ; int total = a * rn /…
smallnoob
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Calculating The Geometric mean of a searies in C

I need to write a program that will calculate the arithmetic and geometric average of 10 variables. When I run tests on the program, it fails to calculate the geometric mean when there are numbers that include zero, for instance the series: 3 2 1 0…
Veronika Kovaleva
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How to plot geometric mean with confidence intervals in ggplot2 R?

I have a dataset for which I want to calculate the geometric mean and the bootstrapped confidence interval. The data has "status" and and "index" ranging from 0 to 1. I want to know: (a) Is there an option where the fun.y = mean can be replaced by a…
Rspacer
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Simplifying recursive formula in geometric (or arithmetic) series

I am trying to implement a recursive function, but that is too computationally intensive. I think there are certain ways to simplify recursive functions into geometric (or arithmetic) series. If it can be simplified, than I can just code the…
Kiann
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R code produces different output for equation in loop every time

I'm trying to calculate the geometric mean and find the maximum possible value for it for a certain set of parameters. I am convoluting two distributions (I think, not sure about the terms in english), one of which is the probability density…
Lotte Victor
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Optimizing calculation for Weighted Geometric Mean of a big set of data using GPU

I need help with an optimization and performance problem related to the calculation of the Weighted Geometric Mean of some data. I introduce the problem with a little sample. I wrote the code to calculate the WGM for the simple example below. % A…
Relok
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