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Making a list from two arrays

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Julien
Julien 2014-8-12
评论： Julien 2014-8-12
I'm relatively new to coding, and have no clue how I would pull the following off.
Say I have two vectors: A = [a b c d] and B = [1 2 3 4].
I would like to make a function that takes these two as inputs and outputs exactly the following into a .txt file, curly brackets included:
{a->1,b->2,c->3,d->4}
I was thinking some kind of for loop, but I have no experience using them and no idea how I would set this up.
Thanks

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-8-12
编辑：Azzi Abdelmalek 2014-8-12
A = {'a' 'b' 'c' 'd'}
B = [1 2 3 4]
out='{'
for k=1:numel(B)
out=[out sprintf('%s->%d,',A{k},B(k))]
end
out(end)='}'
%or
A = {'a' 'b' 'c' 'd'}
B = [1 2 3 4]
out=['{' strjoin(cellfun(@(x,y) sprintf('%s->%d',x,y),A,num2cell(B),'un',0),',') '}']

更多回答（1 个）

Evan
Evan 2014-8-12
编辑：Evan 2014-8-12
How about this?
A = 'abcd';
B = [1 2 3 4];
fid = fopen('my_txt_file','w');
s = [];
for i = 1:numel(A)
s = [s sprintf('%s->%d,',A(i),B(i))];
end
s = ['{' s(1:end-1) '}'];
fprintf(fid,s);
fclose(fid)

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