adding vectors: positive single digit values and returning digits of sum as elements of vector

I am trying to write a function that takes two vectors of positive single digit integer values as its input and return the digits of the sum as elements of a vector.

I have two vectors but am unsure how to start a function that will allow me to perform what is listed in the previous statement. If someonme could please help with me a starting po0int, it would be appreciated.

[Matt J]

Why not simply do vector1+vector2?

[KayLynn]

so if I have vector [x] and vector [y] both of which are single digit integer values and I add the sum together so sum=[x}+[y]. This should calculate the he sum of two scalars composed from the digits in the vector and then return the sum of those digits in the form of a vector.

[KayLynn]

what happens if i have two vectors that are of different sizes...say for example one vector has four numbers while the other vector has five values

[Cedric]

Is it the following that you want to do?

 x = [1,2,3] ;
 y =   [7,9] ;

and then, taking these as sets of digits, add the two numbers that they represent the way we do it by hand? I.e. adding 3 and 9, storing 2 and holding 1, etc.. ?

[Walter Roberson]

Duplicates http://www.mathworks.co.uk/matlabcentral/answers/91275

Has not been merged as both versions have Answers.

Answer 1

[Image Analyst]

Please give an example to show what you want. It could either be

theSum = vector1 + vector2;

like Matt J suggested, or

theSum = sum(vector1) + sum(vector2);

which will work for vectors of different lengths. Or maybe you want to interpolate them to make them equal sizes before summing - we have no idea what you really want. Don't use sum as the name of a variable like you did because sum() is the name of a built in function and you'll disable it if you use the same name for your own functions or variables.

[Cedric]

My guess is that she wants something like an addition the way we do it by hand, with numbers given by digits stored in vectors.

PS: thank you for your comment yesterday. I replied but quite late!

Answer 2

[Walter Roberson]

The question cannot be answered until you reply to the question posed to you when you posted this previously. See http://www.mathworks.co.uk/matlabcentral/answers/91275#comment_176144

Answer 3

[Matt J]

Hints:

    >> x=str2double(char([7 2 4]+'0'))

    x =

       724

    >> y=num2str(x+1)

    y =

    725

>> whos x y
  Name      Size            Bytes  Class     Attributes

    x         1x1                 8  double              
    y         1x3                 6  char