Combining two number to one number

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Poul Reitzel
Poul Reitzel 2011-11-29
评论： Image Analyst 2019-5-19
Dear Matlab users
Im facing the problem of combining two seperate numbers into one number. Let's say i have the number 1 and 2 and want to combine them in that order, resulting in 12. Another example could be 4 and 6, yielding 46, or 3, 6 and 7 yielding 367.. Is there any smart or simple way of doing this?
Thanks in advance, Poul

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采纳的回答

Chandra Kurniawan
Chandra Kurniawan 2011-11-29
a = 1;
b = 2;
c = 3;
result = strcat(num2str(a),num2str(b),num2str(c));
result = str2num(result);

更多回答（2 个）

Image Analyst
Image Analyst 2014-12-28
Use sprintf():
a = 1;
b = 2;
c = 3;
str = sprintf('%d%d%d', a, b, c) % If you want a string.
doubleStr = str2double(str) % If you want a double.
  1 个评论
Stephen23
Stephen23 2019-1-10
Simpler and more versatile to just have one '%d' specifier:
str = sprintf('%d', a, b, c)

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Poul Reitzel
Poul Reitzel 2011-11-29
Exactly! Just went here to post my same suggestion! ;) Thanks
  6 个评论
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A C
A C 2019-5-19
hello, Image Analyst
I was talking about this code. It returns 367
b = [3 6 7]
out = b*10.^(numel(b)-1:-1:0)'
I thought this would look like this
out = [30 60 70].^[2; 1; 0]
but it returns a matrix.
Why are the two codes different. How does the first code return a single number?
Image Analyst
Image Analyst 2019-5-19
Well, it would be good if you had given that equation for "out" in your first post so we'd have known about it.
It's because the first vector is a row vector and the second is a column vector (because of the '). And you're using a recent version of MATLAB that does automatic expansion. Look up expansion here or in MATLAB to see what that means.

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