trying to upend two variables which are varying to form a single row matrix which should be varying and its magnitude at every point need to find the min magnitude

for example

t=0:0.1:1

d1=20+(12.*t)

d2=1+(3.*t)

d=[d1,d2]

i want d matrix to be like

t=0.1

d=[32,4]

t=0.2

d=[44,7] and so on.....

but im getting

d=[32,44,..........,4,7,.....]

i need find the mag of d matrix which is for my problem is vector whose magnitude is to be found at every instant and i have to find minimum magnitude but what im getting is magnitude of entire matrix or some other value pls i need the advice to overcome this

thank you