write a column into excel sheet

I used a while loop and done some calculations. Now I want to write thease results into an excel sheet as a column.But, when I using xlswrite() function only first value is write into excel file.This is my code

xlswrite('uav2.xlsx',sd(:))

Its urgent.Please help

[prasanth s]

1. check whether 'sd' has array of values.
2. xlswrite fuction should be in ouside the loop, so the values not rewritten

[Sajitha K.N.]

Thank you, sir.