How to sum a single column of a cell whose content are vectors

How to sum a single column of a cell whose content is a vector?

data = cell(20,2);

for i=1:20
    data{i,1} = i;
    data{i,2} = rand(1,13);
end

My goal is to sum all values of column 2 (that are vectors) in one scallar.

Answer 1

[Andres]

Using cellfun is fine, but use it with the sum function.

data = cell(20,2);
for i=1:20
    data{i,1} = i;
    data{i,2} = rand(1,13);
end

value = sum(cellfun(@sum,data(:,2)))

Answer 2

[David Hill]

Simple loop.

data = cell(20,2);
for i=1:20
    data{i,1} = i;
    data{i,2} = rand(1,13);
end

s=0;
for k=1:size(data,1)
  s=s+sum(data{k,2});
end
s

s = 129.3577

[Hudson Romualdo]

Thanks for the answer @David Hill.

But now I saw that my question is not clear enough.

I'm wondering if it is possible to do this sum in just one line.

Like that:

value = sum(cellfun(@double,data(:,2)))

But in this case, the cell column have scalar values not vectors.

[David Hill]

data = cell(20,2);
for i=1:20
    data{i,1} = i;
    data{i,2} = rand(1,13);
end
s=sum(arrayfun(@(x)sum(data{x,2}),1:size(data,1)))

s = 135.0550

[Hudson Romualdo]

Nice! =)