Remove elements from string array

2019 11 26
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更新时间：2019 11 26
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What is the simpest way to remove string elements from an array? e.g. arr = [1, 2, 3, "x", "y", 10] would turn into [1,2,3,10]

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Guillaume
Guillaume 2019-11-26
The first issue with your question is that the array [1, 2, 3, "x", "y", 10] cannot exist. You can't mix numbers and strings in a numeric or string array (you could in a cell array but the notation is different). Matlab will automatically convert the numbers to strings in order to create your array:
>> arr = [1, 2, 3, "x", "y", 10]
arr =
1×6 string array
"1" "2" "3" "x" "y" "10"
anon
anon 2019-11-26
Yes that is what I had discovered. What do you suppose I do in order to remove the "x" and "y" from the string array?
Guillaume
Guillaume 2019-11-26
What is the rule that dictates which elements should be removed from the string array?
anon
anon 2019-11-26
Create a new array that contains only integers. So after removing all non-integers the array would need to be turned into a numeric array e.g. [1,2,3,10]

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Guillaume
Guillaume 2019-11-26

0 个投票

One possible way:
numericarray = double(yourstringarray); %convert string array to numeric. Text that can't be converted to numeric will end up as NaN.
numericarray = numericarray(mod(numericarray, 1) == 0); %only keep numbers that are integers. Will also remove NaNs.

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anon
anon
2019-11-26

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Guillaume
Guillaume
2019-11-26

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