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How to save vector columnwise in Excel file

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Atinesh Singh
Atinesh Singh el 22 de Jun. de 2017
Comentada: Nut el 23 de Jun. de 2017
Suppose I am generating a column vector randomly 30 times and each time I wish to save it in the Excel column. Can anybody tell me how to do it.
for i=1:30
vec = randn(5,1);
%%Save vec in excel file
end
  2 comentarios
Jan
Jan el 22 de Jun. de 2017
What is "the Excel column"? Do you want to save all vectors in the same column, or each vector in its own column?
Atinesh Singh
Atinesh Singh el 22 de Jun. de 2017
Each vector in different consecutive columns

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Respuestas (2)

Jan
Jan el 22 de Jun. de 2017
Editada: Jan el 22 de Jun. de 2017
ExcelFile = fullfile(tempdir, 'YourFile.xlsx');
for i = 1:30
vec = randn(5,1);
colName = xlsColNum2Str(i);
xlswrite(ExcelFile, vec, sprinft('%s1:%s%d', colName, colName, numel(vec)));
end
It might be easier or faster, to create a matrix and save it as a block:
mat = randn(5, 30);
Range = sprinft('%s1:%s%d', xlsColNum2Str(1), xlsColNum2Str(5), numel(vec));
xlswrite(ExcelFile, mat, Range);
xlswrite can guess the range, if the sheet was specified:
mat = randn(5, 30);
xlswrite(ExcelFile, mat, 1, 'B2');

Nut
Nut el 22 de Jun. de 2017
Hi,
this code could be valid for you:
for i=1:30
vec = randn(5,1);
% Syntax: xlswrite(filename,A,sheet,xlRange)
xlswrite('Workbook.xlsx',vec,1,[letters num2str(1)])
end
But you need "letters": it is a string corresponding to the column where you want to write the variable "vec".
If to save in Excel for each iteration is not a constraint, you can avoid this. First, you should generate the whole matrix to be exported in Excel, and finally write it into the workbook. I think this way is also more efficient.
mtx = zeros(5,30);
for i=1:30
mtx(:,i) = randn(5,1);
% Syntax: xlswrite(filename,A)
xlswrite('Workbook.xlsx',mtx)
end
  2 comentarios
Atinesh Singh
Atinesh Singh el 23 de Jun. de 2017
I know saving the entire matirx would be easier and faster, but in my case vector are generating dynamically hence I have to save them column by column.
Nut
Nut el 23 de Jun. de 2017
Ok. So, the issue is how to generate the string corresponding to the name of the Excel column. I use a my own code to do this, but you can refer to the answer by Jan Simon: it calls a ready-to-use function from Matlab Exchange, so it should be a better way.

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