Convolution not working with 'uint16'

I'm importing some .dat data into MATLAB to perform a discrete time convolution on a 'uint16' number.

I'm using the fread and conv functions to calculate a convolution. I find that when adding the 'uint16' variable to fread the convolution gives really small values.

test1 = [0.25 , 0.25 , 0.25 , 0.25];


% Answer gives very small convolution
x = fopen('in.dat');
A = fread(x, 'uint16');
conv(A,test1)

% Gives correct answer
z = fopen('in.dat');
C = fread(z);
v = nonzeros(C);
conv(v,test1)

Why does adding 'uint16' to the input produce the incorrect result? When looking at the difference between A and v, I cannot see any difference?

Answer 1

[Star Strider]

That likely has to do with the precision of the calculations. I would convert them to double, do the calculations, and then convert back to unit16.