average

问题 I need help with taking the following data which is organized in a large matrix and averaging all of the values that have a matching ID (index) and outputting another matrix with just the ID and the averaged value that trail it. File with data format: (This is the StarData variable) ID>>>>Values 002141865 3.867144e-03 742.000000 0.001121 16.155089 6.297494 0.001677 002141865 5.429278e-03 1940.000000 0.000477 16.583748 11.945627 0.001622 002141865 4.360715e-03 1897.000000 0.000667 16.863406 13

问题 I am writing a code in which I am reading from a CSV text file which is given as an argument in the command line. I have to calculate the averages of the experiments of the given file: for example, if the file is Bob's experiment,12,33,55,8 Mary's experiment,99,21,12,0 I have to print out Bob's experiment (average of numbers) Mary's experiment(average of numbers) Here is my code: #include<stdio.h> #include<stdlib.h> #include<stdlib.h> #include<string.h> int main (int argc, char *argv[]){ FILE

问题 I have an array that is 13867 X 2 elements and stored in variable called "data". So, I want to do the following in Matlab: Average (row 1 -> row 21) ; i.e. take the average of first 21 elements Average (row 22 -> row 43) ; i.e. take the average of next 22 elements Average (row 44 -> row 64); i.e. take the average of the next 21 elements Average (row 65 -> row 86); i.e. take the average of the next 22 elements Repeat the process until the end of the matrix, so that we take the average of the

问题 I know this question sounds a bit challenging, but hey I find nothing like this relates with F sharp here. Okay so, since in my previous question I mentioned I'm new to F#. Thanks to several of fellow programmers' helps here to solve my sum function in my previous question. So, I have a text file that contained more than 20 lines and I want to print out lines with year and average of total elements from each year and its elements. Sample text lines 2009 1.3 3.51 6.76 5.80 4.48 5.47 2.06 4.3 0

问题 I need some help in this problem I have this matrix in MATLAB: A = [ 25 1.2 1 28 1.2 2 17 2.6 1 18 2.6 2 23 1.2 1 29 1.2 2 19 15 1 22 15 2 24 2.6 1 26 2.6 2]; 1st column is some measured values for temperature 2nd column is an index code representing the color (1.2:red,.....etc) 3rd column is the hour of taking the sample. Only at hours from 1 to 2 I want the matrix to be controlled by 2nd column as follows: if it is 1.2, the program will find the average of all temperatures at hour 1 that

问题 I wanted to get an average hours but I'm having problems because if I use DateTime.add() object for adding time when it exceeds 24 hours it converts time to "day". Basically I just want to get the average of these times in "hours". Please help. $time = array(); $time[] = '00:00:58'; $time[] = '00:45:08'; $time[] = '00:00:49'; $time[] = '00:11:26'; $time[] = '02:34:39'; $time[] = '02:18:24'; $time[] = '02:24:11'; $time[] = '01:23:19'; $time[] = '00:27:30'; $time[] = '02:14:50'; $time[] = '00

问题 I have the following multidimensional array, Array ( [0] => Array ( [place] => 1 [date] => 2013-01-01 ) [1] => Array ( [place] => 2 [date] => 2013-01-02 ) [2] => Array ( [place] => 3 [date] => 2013-01-03 ) [3] => Array ( [place] => 10 [date] => 2013-01-01 ) [4] => Array ( [place] => 8 [date] => 2013-01-02 ) [5] => Array ( [place] => 5 [date] => 2013-01-03 ) ) How can I get the average place each array where the dates match, so the out put array would look like? The most i've been able to do

问题 I want to implement the averaged perceptron algorithm, in accordance with this description (page 48, complete with psuedocode). I think I'm pretty close, but I'm having trouble trying to figure out the last step wherein I need to compute the average of the weights calculated during every iteration for each particular index, and then assign that value to a final array of weights. How would I implement that? The structure of the hashmap is int which is the number of iterations, and then an

问题 I have this Sales Table by Customer in Mysql +-----------+------------+-------+-----------------+ | Customer | Date | Sales | Date_First_Sale | +-----------+------------+-------+-----------------+ | Jane | 2016-04-30 | 903 | 2015-02-03 | | Jane | 2016-02-03 | 51 | 2015-02-03 | | Jane | 2016-03-09 | 192 | 2015-02-03 | | John | 2016-05-10 | 64 | 2015-10-03 | | John | 2016-04-16 | 880 | 2015-10-03 | | John | 2016-08-17 | 386 | 2015-10-03 | | John | 2016-03-01 | 503 | 2015-10-03 | | Juan | 2016

问题 Can I combine these 2 SQL statements? Currently running 2 queries. Trying to tighten up a bit. First one: SELECT * FROM (`cars`) JOIN `brands` ON `brands`.`br_id` = `cars`.`brand_id` WHERE `cars`.`id` = '185707' Second one: SELECT ROUND(AVG(rating)) as avg_rating FROM car_ratings WHERE car_id = 185707 回答1: You can do this using group by : select cars.*, brands.*, round(avg(car_ratings.rating)) as avg_rating from (cars inner join brands on brands.br_id = cars.brand_id) left join car_ratings on