Every vector should represent a row. Vector elements ->columns, Vectors -> rows.
I'm not sure what you mean by that without any further context. Anyway, saving variables for later use is easy enough. Here's a little demo:
>> x = 1:5
x =
1 2 3 4 5
>> y = 5:-1:1
y =
5 4 3 2 1
>> whos
Name Size Bytes Class Attributes
x 1x5 40 double
y 1x5 40 double
>> save('myvars')
>> clear
>> whos
>> x
Undefined function or variable 'x'.
>> y
Undefined function or variable 'y'.
>> load('myvars')
>> whos
Name Size Bytes Class Attributes
x 1x5 40 double
y 1x5 40 double
>> x
x =
1 2 3 4 5
>> y
y =
5 4 3 2 1
This will create a file myvars.mat which holds the values of all currently defined variables.
EDIT in response to your comment:
So let's say we have these N vectors V1,V2,...VN, you can create the desired matrix by issueing
M = [V1;V2;...;VN]
Now save it to a file with
save('mymatrix', 'M')
This will create a file mymatrix.mat which holds the matrix M for later use. To load it into the workspace, simply issue
load('mymatrix')
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