make replacements in an array

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Michael
Michael 2011-6-10
i have an array of doubles, A.
A = [0; 0; 1; 1; 0; 1];
I wish to replace all the 1's with 'yes' and the 0's with 'no'. can this be done in order to produce an output B?
B = [no; no; yes; yes; no; yes];
  1 个评论
Michael
Michael 2011-6-10
ok, in understand the whole character thing, but just say i want to add a 3rd option to the mix..
A = [1; 2; 3]
how do i get:
B = ['one '; 'two '; 'three']
?
thanks again everyone

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采纳的回答

Sean de Wolski
Sean de Wolski 2011-6-10
B must be a cell array.
A = [0; 0; 1; 1; 0; 1];
B = repmat({'no'},size(A));
B(logical(A)) = {'yes'}
Part 2
Numbs = {'one';'two';'three'}; %etc
A = [1;2;3];
B = Numbs(A)

更多回答（2 个）

Jan
Jan 2011-6-10
A = [0; 0; 1; 1; 0; 1];
C = {'no', 'yes'}
B = reshape(C(A + 1), [], 1);
But as Matt T. said: Now B is a CELL string, which is not exactly "[no; no; yes; yes; no; yes]", because this is not possible in Matlab.
Matt Tearle
Matt Tearle 2011-6-10
You can't have a matrix of strings 'yes' and 'no', like you've shown. You can have logicals (true/false), but they will display like 1/0. You can make a cell array of strings. You can make a character array of strings by padding the 'no's with a space ('no '). Or, if you have Statistics Toolbox, you can make a nominal array.
What is your purpose in all of this?
  2 个评论
Michael
Michael 2011-6-10
basically for work i have to produce reports and there are different types of data that i look at and wanted to tag each type of data with strings. right now i just have numbers to tag them instead of character labels. this was just a simple example. there are actually 3 types of data that i tagged as 1, 2, and 3.
Matt Tearle
Matt Tearle 2011-6-10
A = randi(3,1,10)
B = nominal(A,{'one','two','three'},1:3)
(if you have Stats TB)

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