Converting 1*4 array into 1*1

hi,

I have an array a=[1 2 3 4] with dimension 1*4 and i want it to convert into

value 1234 of size 1*1 double.

other example : a=[4 5 6 7 8 9] size 1*6 , convert into 456789 , size 1*1 double.

Answer 1

[Azzi Abdelmalek]

a=[1 2 3 4];
b=num2str(a);
b(b==' ')=[];
out=str2num(b)

Answer 2

[Wayne King]

There are many ways. One way

a = [1 2 3 4];
b = num2str(b);
b(isspace(b)==1) = [];
a = str2num(b);

Answer 3

[Muge Erinc]

Might this work?

 a=[1 2 3 4] ;
 b='';
 for i=1:size(a,2)
    b=[b num2str(a(i))];
 end

 str2double(char(b))

Answer 4

[Jos (10584)]

Avoid the overhead of converting numbers into strings and back ... Use simple school math and a matrix multiplication:

a = [2 3 0 1 5]
b = 10.^(numel(a)-1:-1:0) * a(:)