accumulate in multiple array

I have:

Temperature profiles array for 5 days. such that, temp(heigth,day). however, there are multiple profile in some days which makes the number of profile equal 11.

size of temp = (3650 by 11)

size of day = (1 by 11)

day=[1,1,1,2,2,3,3,3,4,4,5].

I want to:

average temperature for every similar days

such that:

dailyday=[1,2,3,4,5]

temp=(3650 by 5)

Answer 1

[madhan ravi]

splitapply(@(x) mean(x,2),Temp,findgroups(Day))

[madhan ravi]

Prior to 2015b:

dailyday=unique(Day)
M=mat2cell(Temp,size(Temp,1),histc(Day,dailyday));
temp=cell2mat(cellfun(@(x) mean(x,2), M, 'un',0))

[Kafayat Olayinka]

I recieved this message while running the second line.

Error using mat2cell (line 89)

Input arguments, D1 through D2, must sum to each dimension of the input matrix size

[Kafayat Olayinka]

Recieved this error while compiling the first code with splitapply*

Error using splitapply (line 132)

The function '@(x)mean(x,2)' returned a non-scalar value when applied to the 5th group of data.

To compute nonscalar values for each group, create an anonymous function to return each value in a scalar

cell:

@(x){mean(x,2)}

[madhan ravi]

C=splitapply(@(x) {mean(x,2)},Temp,findgroups(Day));
[C{:}]
%or
[~,~,c]=unique(Day);
C = accumarray(c,1:size(Temp,2),[],@(x){mean(Temp(:,x),2)}); 
[C{:}]

[Kafayat Olayinka]

Worked perfectly. Thank you.

Answer 2

[Walter Roberson]

[mean(temp(:,1:3),2), mean(temp(:,4:5)), mean(temp(:,6:8)), mean(temp(:,9:10)), temp(:,11)]

[Kafayat Olayinka]

Thanks. How should I write the loop assuming Days are more than 5 days and each day may have multiple temperature profiles. How should I average each temp profile per day?