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Consider the following Matrix named Temp, which contains the monthly average temperature during the period of 2005-2009.
A =
12 10 11 13 8
10 11 13 14 7
15 14 16 14 12
18 21 22 19 20
22 22 24 20 21
26 27 28 25 28
27 29 30 29 30
28 28 29 27 28
20 23 24 22 22
19 21 19 18 19
14 13 14 12 10
11 9 10 10 9
Write the Matlab commands to do the following operations:
1. The average temperature in 2008 saved in Average_2008.
>>Average_2008= mean(A(:,4))
ans =
18.5833
2. The vector of the average temperatures in the summer months (July, August and September) during 2005-2009 and save it Average_Summer.
>> July= mean(A(7,:))
July =29
>> August= mean(A(8,:))
August =28
>> September= mean(A(9,:))
September =22.2000
>> c=[July August September]
c =29.0000 28.0000 22.2000
>> mean(c)
ans =26.4000
>> Average_Summer=mean(c)
Average_Summer =26.4000
3. The average temperature in February during 2005-2009 and save it Average_February.
>> Average_February= mean(A(2,:))
Average_February =11
4. The number of months of 2009 in which the temperature was above 20 °C and save it Hot_2009.
>> Hot_2009=A(:,5)>20
Hot_2009 = 0
0
0
0
1
1
1
1
1
0
0
0
>> Hot_2009=sum(A(:,5)>20)
Hot_2009 =5