Update, I mistyped my format. My cell array is actually a column of cells such that:
>> X = { rand(4,1); rand(4,1); rand(4,1) }
X =
3×1 cell array
{4×1 double}
{4×1 double}
{4×1 double}
Both answers below work if you first transpose X:
>> X = X';
Thank you for the help!