Is there a smart way to update the array?

Question

Niraj 2012-11-25

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/54739-is-there-a-smart-way-to-update-the-array

I am trying to update my array.i have an array ids which needs to be updated,whenever there is a new member(which is not present already in ids).Currently, i am using:

 end
test = ismember(id_final,ids);%id_final is a temporary array
for k = 1:size(test,2)
if test(k) ==0
     ids =cat(2,ids,id_final(k));
        end
    end

Is there some smart way to do this?

Please reply.

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Answer 1

Walter Roberson 2012-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/54739-is-there-a-smart-way-to-update-the-array#answer_66454

在 MATLAB Online 中打开

test = ismember(id_final,ids);%id_final is a temporary array
ids = [ids id_final(~test)];

Note: if the order of the ids is not important, just use

ids = union(ids, id_final);

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Niraj 2012-11-26

编辑：Niraj 2012-11-26

Thanks..it worked. :) Could you please tell me 1 small thing about answering in Mathworks! How did you add the "Accept this answer" button? I also want to add this button when reply to someone's question.

Thanks

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