Which function should I use to find summation of specific values in a column array? I checked already histcounts function but I could not handle it.

I need to find summation of last 10 terms in a column and continue with this interval until all the intervals are summed values in that column but my another issue is let's say I have 16 rows so last 10 rows are ok but the sum of remained 6 values are also should be calculated and the only difference btw the summation of 10 terms is their range so which functions should I check? I can do it by formulating but I am looking for a shortcut.

[Jan]

What are your inputs? A vector, matrix multi-dimensional array, time series, table, ...

"I can do it by formulating but I am looking for a shortcut." - How would such a formulation look like for some small example data?

[busra gogen]

my inputs may change so this is why I am looking for a function. My input contains years and number of occurence regarding these years. For example, it may be like this:

years #ofevents

1900 5

1901 17

1902 8

1903 9

....

1939 10

This case looks normal because there are 4 intervals but if it ends with 1940, there will be extra one year apart from 10 years intervals.

Answer 1

[Matt J]

Let's call your matrix, A. Then,

A=rand(16,2);  %hypothetical input

[N,M]=size(A);

N=ceil(N/10)*10;

A(end+1:N,:)=0;

result=sum(reshape(A,10,[]));

result=reshape(result,[],M)

result = 2×2

3.7391 5.6570 3.3933 2.2748

%Check:
sum(A(1:10,:))

ans = 1×2

3.7391 5.6570

sum(A(11:16,:))

ans = 1×2

3.3933 2.2748

[busra gogen]

Thank you it works well but I want to obtain the summations by starting from end

[busra gogen]

I changed the orientation of column, thank you so much!