help with mat file

When I load a mat file by giving its full path like this

load ('E:\Mathematical modellling\assignment1\april6\spectral_3.mat'); 

whos -file 'E:\Mathematical modellling\assignment1\april6\spectral_3.mat'

I find that the type is double

but when I try to open it like

y=load ('spectral_3.mat');
whos -file 'spectral_3.mat'

then i find that the type is struct How can i fix it

Actually I want to send the mat file with the assignment.

[KSSV]

Your data is stored in y. YOu can extract the data from it.

[Walter Roberson]

In particular y will be a struct with one field for each variable stored in the file.