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Extract last character in table variable as new table variable

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Matt Glowacki
Matt Glowacki 2019-4-30
回答： Peter Perkins 2019-5-3
Hi,
I'm trying to extract the last character of a variable in a table (tAll.Sym) to a new varaible, but cant figure out the syntax. I was able to get the first two characters to a new variable tAll.Product using:
tAll.Product = strtrim(extractBetween(tAll.Sym,1,2));
but I cant determine how to extract only the last character, it seems that you cannot use 'end', and my "Sym" variables are not all the same length so i cannot hard code 10 as the last.
Obviously I can create a loop and iterate over the whole table, but i thought i should be able to do it without a loop like the code above. Thanks for any help in advance!

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采纳的回答

Walter Roberson
Walter Roberson 2019-4-30
Last = @(v) v(end);
tAll.Product = arrayfun(@(S) Last(char(S)), tAll.Sym);
This uses a hidden loop instead of an explicit loop.

更多回答（1 个）

Peter Perkins
Peter Perkins 2019-5-3
As Walter showed, this is more of a "string" question than a "table" question. In MATLAB versions since (IIRC) R2016b-ish, try this alternative to arrayfun:
>> s = ["ax"; "bby"; "cccz"]
s =
3×1 string array
"ax"
"bby"
"cccz"
>> extractAfter(s,strlength(s)-1)
ans =
3×1 string array
"x"
"y"
"z"

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