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How to generate names?

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Hello kity
Hello kity 2013-1-8
I want to make my code shorter.
I have this code:
Sheetname1=txt1{1,3};
Sheetname2=txt2{1,3};
Sheetname3=txt3{1,3};
Sheetname4=txt4{1,3};
Sheetname5=txt5{1,3};
Sheetname6=txt6{1,3};
instead there should be a for loop
for i=1:6
Sheetname'write i'=txt'write i'{1,3};
end
how to :) ?
  1 个评论
Hassan F
Hassan F 2013-1-8
Is there a specific reason why you implemented your script this way? Such a for loop will be slow and hard to read later on.

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回答（5 个）

Walter Roberson
Walter Roberson 2013-1-8
Hassan F
Hassan F 2013-1-8
You can use eval
for i=1:6
eval(['Sheetname' num2str(i) '=txt' num2str(i) '{1,3};'])
end
  5 个评论
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Jan
Jan 2013-1-8
编辑：Jan 2013-1-8
I do think that it matters. Programmers get used to use methods they are used to use. The more EVAL you write, the more acceptable does this command look, because we are human.
Much better in theory, practice and from the viewpoint of training the brain to think in efficient ways:
Sheetname{1} = txt{1,3};
Sheetname{2} = txt{2,3};
Sheetname{3} = txt{3,3};
Sheetname{4} = txt{4,3};
Sheetname{5} = txt{5,3};
Sheetname{6} = txt{6,3};
Never include an index in the name of a variable. You would not include your current weight to your name also, because the inconveniences are obviously.
Kind regards, Jan70.6kg
Hassan F
Hassan F 2013-1-8
Totally makes sense.
Hassan74.0kg

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Hello kity
Hello kity 2013-1-8
I tried this : >>
for i=1:6
A=['Sheetname' sprintf('%d' , i)];
B=['txt' sprintf('%d', i)];
A(i)=B{1,3}(i);
end
??? Cell contents reference from a non-cell array object.
somehow it gives error about B{1,3}
while
>> txt1{1,3}
ans =
T1
  1 个评论
Hassan F
Hassan F 2013-1-8
编辑：Hassan F 2013-1-8
See my answer http://www.mathworks.se/matlabcentral/answers/58253#answer_70475, but you should avoid this solution and use cells or other classes which suits your data the most.

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Azzi Abdelmalek
Azzi Abdelmalek 2013-1-8
A=cell(1,6);
for ii=1:6
A{ii}=sprintf('Sheetname%d' , ii)
end
Image Analyst
Image Analyst 2013-1-8
My m-files are usually 2-3 thousand lines long. I never worry about saving a paltry 3 lines. Why do you care? If you want to use fewer variables, say use a cell array for Sheetname instead of 6 variables, then you could do that, but with only 6 variable, it's really no big deal. Now if you had dozens or hundred variables named like that (which we see sometimes).....then yes, you'd want an array, but I'm not going to ding you for only 6 uniquely named variables.

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