average

问题 Helo everyone. int[] ai1=new int[2] { 3514,3515 }; void average1() { List<int> aveList = new List<int> { ai1[0],ai1[1]}; double AveragLI = aveList.Average(); int AverLI = (int)Math.Round((double)AveragLI); label1.Text = AverLI.ToString(); } Returns 3514; should not be 3515? 回答1: Math.Round is the culprit int AverLI = (int)Math.Round((double)AveragLI); Its what we call Banker's Rounding or even rounding. Info on Math.Round says The integer nearest a. If the fractional component of a is halfway

问题 based on Summarize array of objects and calculate average value for each unique object name I could partially solve my problem. I did group by ed_id but I need to group by ed_id and then el_id and to get average value based on those group by, so here is my array of hashes: a = [ { ed_id: 1, el_id: 127, value: 2 }, { ed_id: 1, el_id: 127, value: 6 }, { ed_id: 1, el_id: 129, value: 3 }, { ed_id: 1, el_id: 129, value: 13 }, { ed_id: 2, el_id: 127, value: 5 }, { ed_id: 2, el_id: 127, value: 9 },

问题 I have a square image, for example this one: and I would like to calculate the 1D average of the image for each radius from the position (0,0). I have written some code to do so, but first of all it very slow even for small images, secondly I see that there are also some problems with the idea behind it. Code is here: import matplotlib.pyplot as plt import numpy as np import collections from skimage import data image = data.coins() image = image[:,0:303] print(image.shape) projection = {}

问题 I'm trying to create a data frame in R that will allow me to view the average home betting odds for each team along with the number of home wins for each season. There are 6,840 records in the dataset representing 18 seasons' worth of Premier League football. This means there are 380 match entries for each season. Let me show you an example. It is a drastically cut down example, but it gives you a good enough idea about what I'm trying to achieve. Key: FTHG (Full-Time Home Goals), FTAG (Full

问题 I'm trying to create a data frame in R that will allow me to view the average home betting odds for each team along with the number of home wins for each season. There are 6,840 records in the dataset representing 18 seasons' worth of Premier League football. This means there are 380 match entries for each season. Let me show you an example. It is a drastically cut down example, but it gives you a good enough idea about what I'm trying to achieve. Key: FTHG (Full-Time Home Goals), FTAG (Full

问题 I need to find average salary from employees of file John Harris $50000.00 Lisa Smith $75000.00 Adam Johnson $68500.00 Sheila Smith $150000.00 Tristen Major $75800.00 Yannic Lennart $58000.00 Lorena Emil $43000.00 Tereza Santeri $48000.00 How can I access the salaries of the employees so that i can find the average? I have managed to get each line of a file into a string but I dont know how to access the salaries of each employee my code is: #include<iostream> #include<fstream> #include

问题 Imagine a time series that peaks cyclically around end-December/early-January. The maxima of the series will then have dates like those showed in dt1 or dt2 below. I need to compute the average day of the year (DOY) of those maxima. The problem is that a normal average would give very different results for dt1 (211) and dt2 (356). The cause is obviously that some elements of dt1 are in January, so the corresponding DOYs are very small and bring the resulting average down. I originally worked

问题 I am trying to use AVERAGEIFS inside ARRAYFORMULA . Looking at other questions, I have come to the conclusion that it is not possible without using QUERY function. My intention is to average the values of a column whenever they share the same ID. I think this question comes pretty close to what I need, but I haven't been able to replicate and adapt its solution on my own sheet. In this sheet I show the result I expect (I got it by dragging the formula). I've also reviewed the Query Language

问题 I want to find XY of the center (red) of a convex-hull points (orange circles) set that is a result from collision detection. Using separating-axis technique, I know for sure that the convex shape (pink) is relatively thin in Z-axis . In >90% of my use cases, the amount of vertices is not more than 8. My poor algorithm (AABB) ... MCVE I tried to implement it by calculating the center point of AABB. However, when I use it in real Physics simulation, the collision point (red) is not accurate

问题 I'm trying to average scores within a particularly category. I have a table that contains a list of directors, movies, genres, ratings and scores. When the user clicks on a movie I'd like them to be able to see the average score for all other movies in that genre. I think that I have to use the average method in conjunction with a condition. That said I haven't been able to find any useful documentation online regarding this specific topic. If someone could point me in the direction of a