Exporting data from cell to Excel file - excel

Question

Let's say I have a cell named data like this:
data{1} = vector1;
data{2} = vector2;
...
data{n} = vectorn;
All vectors (with numerical values) in data have the same 1xN size.
Now, I want to export this data file into an .xlsx document where each row is a vector and I want to label each column. The result should be something like this:
label1 label2 ... labelN
vector1(1,1) vector1(1,2) ... vector1(1,N)
... ... ... ...
vectorn(1,1) vectorn(1,2) ... vectorn(1,N)
I tried to do this using:
n=10;
N=5;
for i=1:n
data{i}=rand(1,N);
end
filename='test.xlsx';
xlswrite(filename,data)
but my .xlsx file comes with all the data from data in just one row. And I don't know how to do the labels.
Please help me.

Answer 1

This can be done using vertcat, num2cell, sprintf, strsplit and xlswrite as follows:
modified_data = num2cell(vertcat(data{:})); % Converting 1xn cell into nxN cell
% Generating Column Headers as specified in the question
col_header = strsplit(sprintf('label%d ' , 1:N));
col_header = col_header(1:end-1);
% If N is not much high number (e.g; if N=5), you can input Column Headers as:
% col_header = {'label1','label2','label3','label4','label5'};
filename='test.xlsx'; % Name of the excel file to be written
xlswrite(filename,[col_header; modified_data]); % Writing the excel file

Answer 2

Its because you call rand(1,N) together in one cell (data{i}). For each value in its own cell you have to create a nxN matrix of cells, which is easiest done if you transfrom the entire matirx:
n=10;
N=5;
data=rand(n,N);
celldata=num2cell(data);
filename='test.xlsx';
xlswrite(filename,celldata);
otherwise you have to make two loops but thats not so great performancewise