Combing 2 arrays of different size in matlab

Hello,

I have a weird problem and I can not figure out how to go about it.

I have a double array that's 1x8

I need to add another row to this array that's 1x10 and since the old array didn't have values for column 9 and 10, I want that to be NaN

so,

    oldarr = [1,2,3,4,5,6,7,8]
    newarr = [1,2,3,4,5,6,7,8,9,10]

    combinearr =

     1     2     3     4     5     6     7     8   NaN   NaN
     1     2     3     4     5     6     7     8     9    10

How would I do this?

Answer 1

[Azzi Abdelmalek]

oldarr = [1,2,3,4,5,6,7,8]
newarr = [1,2,3,4,5,6,7,8,9,10]
n=numel(oldarr)
m=numel(newarr)
nm=max(n,m)
combinearr = [oldarr nan(1,nm-n); newarr nan(1,nm-m)]

Answer 2

[Steven Lord]

 x = 1:7;
 Lx = size(x, 2);
 y = 1:5;
 Ly = size(y, 2);
 M1 = [x, NaN(1, Ly-Lx); ...
       y, NaN(1, Lx-Ly)]
 M2 = [y, NaN(1, Lx-Ly); ...
       x, NaN(1, Ly-Lx)]

The documentation page for NaN includes this note:

"The size inputs sz1,...,szN, as well as the elements of the size vector sz, should be nonnegative integers. Negative integers are treated as 0."

ZEROS, ONES, RAND, etc. behave the same way in case you want different padding.