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

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KayLynn 2013-10-29

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编辑： Matt J 2013-10-30

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.

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Cedric 2013-10-30

编辑：Cedric 2013-10-30

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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 2013-10-30

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

Has not been merged as both versions have Answers.

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Answer 1

Image Analyst 2013-10-30

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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.

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Cedric 2013-10-30

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!

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Answer 2

Walter Roberson 2013-10-30

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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

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Answer 3

Matt J 2013-10-30

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编辑：Matt J 2013-10-30

在 MATLAB Online 中打开

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