How can one do this calculation?
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I have a data
Month City Temperature
1 1 25 24 22 19 ...
1 2 21 19 17 16 ...
2 1 23 19 18 17 ..
2 2 20 18 15 13 ..
Then what I like to do is to calculate, for each month, the nth highest temperature from temperature of every city of the month, and then add this info column for each row of this month.
In the above table, for n=2, the second highest temperature in Month 1 is 24, and 20 in Month 2. Thus the output one wants is
Month City 2nd_Hightst_Temp Temperatures
1 1 24 25 24 22 19 ...
1 2 24 21 19 17 16 ...
2 1 20 23 1918 17 ..
2 2 20 20 18 15 13 ..
Thank you in advance.
2 个评论
Harshit Gupta
2022-7-16
Could you provide a link/attachment of this data?
Image Analyst
2022-7-16
We'll get to work on it as soon as you attach your data and code to read it in with the paperclip icon. But first read this:
采纳的回答
tHi2=maxk(tData.Temperatures,2,2); tHi2=tHi2(:,2); % get top two, keep second only
tData=addvars(tData,tHi2,'before','Temperatures','NewVariableNames',{'2nd Highest Temperature'});
ADDENDUM/CORRECTION:
The second optional argument to operate over the second dimension (by rows) was inadvertently omitted...
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