I have an array T which is 76×1 Array{Any,2}. How can I convert it into 76-element Array{Float64,1} or a 76 element row vector? This array contains data only in rows.

That’s not an array, that’s an array of a scalar and a matrix. Something like Float64.(vcat(T[1], vec(T[2]))) could work. You may want to read the manual, these kind of data manipulations are very basic and it will be frustrating to use Julia without being aware of them.