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How can I extract a word from a vector, instead of a number?

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Marcela Ruiz de Chávez
编辑： Marcela Ruiz de Chávez 2013-11-4
apples=1;
pears=2;
melons=3;
oranges=0;
w=[apples pears melons oranges];
maximum=max(w)
Instead of getting a number, I want to get a word. That is, instead of getting "maximum=3", I want to get "maximum=melons"
Thanks!

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Azzi Abdelmalek
Azzi Abdelmalek 2013-11-3
编辑：Azzi Abdelmalek 2013-11-3
Create a structure array with name and num fields.
w=struct('name',{'apples' 'pears' 'melons' 'oranges'},'num',{1 2 3 0})
fruit_names={w.name}
fruit_numbers=[w.num]
idx=max(fruit_numbers)
maximum=fruit_names{idx}
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Walter Roberson
Walter Roberson 2013-11-3
You cannot do that with your setup. The "w" you construct only contains values and does not track any history of what variable names were used to construct the numeric vector.
You should have a look at containers.map -- though at the moment I do not know if it can handle 0 as the index.
What I would do would be:
fruitnames = {'oranges', 'apples', 'pears', 'melons'};
w = 0 : (length(fruitnames) - 1);
maximum = fruitnames{ 1 + max(w) };
or
maximum = fruitnames{end};
Note that maximum will end up as a string for this code.
See also, http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

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