average

问题 I have four matrices that are 240x30. I need to calculate an average for every 15 rows and I need to do this by column. So, in the end I should have 30 columns with 16 values. So, for instance: myMatrix = randi(240,30) And this is what I have so far: averageBins = 15; meanByBinsMyMatrix = arrayfun(@(i) mean(myMatrix (i:i+averageBins-1)),1:averageBins:length(myMatrix )-averageBins+1)'; % the averaged vectormean() This seems to be working but I think it only does the job for the first column.

问题 I have four matrices that are 240x30. I need to calculate an average for every 15 rows and I need to do this by column. So, in the end I should have 30 columns with 16 values. So, for instance: myMatrix = randi(240,30) And this is what I have so far: averageBins = 15; meanByBinsMyMatrix = arrayfun(@(i) mean(myMatrix (i:i+averageBins-1)),1:averageBins:length(myMatrix )-averageBins+1)'; % the averaged vectormean() This seems to be working but I think it only does the job for the first column.

问题 as per example: A B C D E F G ∞ |======|=======|=====|=====|=====|=====|=====|===== 1 | |AVERAGE| | | | | | |======|=======|=====|=====|=====|=====|=====|===== 2 | xx 1 | | 1 | 2 | 0.5 | 10 | | |======|=======|=====|=====|=====|=====|=====|===== 3 | xx 2 | | 7 | 1 | | | | |======|=======|=====|=====|=====|=====|=====|===== 4 | | | 0 | | | | | |======|=======|=====|=====|=====|=====|=====|===== 5 | xx 3 | | 9 | 8 | 7 | 6 | | |======|=======|=====|=====|=====|=====|=====|===== 6 | xx 4 | | 0 |

问题 I want to get the average GDP of each country across the years, the columns 2006, 2007...2015 contain the GDP numbers... My code returns an error that mean(axis=1) needs at least 1 variable, and 1 has been assign to it... which is weird..I also find it weird that we are using mean instead of avg, but coulnd't find an avg function for groupby here is my code Top15 = ANSWER Top15 = Top15[['Country', '2006', '2007', '2008', '2009', '2010', '2011', '2012', '2013', '2014', '2015']] return Top15

问题 I want to get the average GDP of each country across the years, the columns 2006, 2007...2015 contain the GDP numbers... My code returns an error that mean(axis=1) needs at least 1 variable, and 1 has been assign to it... which is weird..I also find it weird that we are using mean instead of avg, but coulnd't find an avg function for groupby here is my code Top15 = ANSWER Top15 = Top15[['Country', '2006', '2007', '2008', '2009', '2010', '2011', '2012', '2013', '2014', '2015']] return Top15

问题 I'm doing some request to help a game dev to balance his game, i'm trying to see how many player use what rune, and at what average level here is my code : declare @runeID varchar(100) set @runeID=22001 select counT(i.characterid) as 'user level 1 to 10', avg(i.maxUpgrade) as 'average level' from items i inner join characters c on i.characterId=c.characterId where itemId=@runeID and level>0 and level<11 and attached>0 select counT(i.characterid) as 'user level 11 to 20', avg(i.maxUpgrade) as

问题 I'm doing some request to help a game dev to balance his game, i'm trying to see how many player use what rune, and at what average level here is my code : declare @runeID varchar(100) set @runeID=22001 select counT(i.characterid) as 'user level 1 to 10', avg(i.maxUpgrade) as 'average level' from items i inner join characters c on i.characterId=c.characterId where itemId=@runeID and level>0 and level<11 and attached>0 select counT(i.characterid) as 'user level 11 to 20', avg(i.maxUpgrade) as

问题 I have to display for each user the first and last name, year as studyYear, age, average grade, and also the general average grade. General average grade I need to be computed like this: Sum(AverageGrade)/ total number of grades [userID] [FirstName] [LastName] [BirthDate] [Year] [AverageGrade] My problem is the sum of the the general average grade. I understand that I have to use Sum(AverageGrade) + group by but it wont work, help? select FirstName+' '+LastName as FullName, AverageGrade ,Year

问题 I have to display for each user the first and last name, year as studyYear, age, average grade, and also the general average grade. General average grade I need to be computed like this: Sum(AverageGrade)/ total number of grades [userID] [FirstName] [LastName] [BirthDate] [Year] [AverageGrade] My problem is the sum of the the general average grade. I understand that I have to use Sum(AverageGrade) + group by but it wont work, help? select FirstName+' '+LastName as FullName, AverageGrade ,Year

问题 I have to display for each user the first and last name, year as studyYear, age, average grade, and also the general average grade. General average grade I need to be computed like this: Sum(AverageGrade)/ total number of grades [userID] [FirstName] [LastName] [BirthDate] [Year] [AverageGrade] My problem is the sum of the the general average grade. I understand that I have to use Sum(AverageGrade) + group by but it wont work, help? select FirstName+' '+LastName as FullName, AverageGrade ,Year