Create new fields on structure from char array
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Hi, I have an struct with some char names, and I want each one to became a field in other structure. This is the structure with the names:
This is the structure and the place where I want the names:
I tried several things from Matlab Answers, but nothing works. For example:
arbitrage = struct('Exchanges',list_exchanges);
for ii = 1:15
newfield = coins(ii).coins;
arbitrage.(newfield) = 1;
%arbitrage = setfield(arbitrage,'newfield',[]);
%[arbitrage(:).newfield] = [];
end
Presents this error:
Scalar structure required for this assignment.
Error in arbitrage_bot_v0_1 (line 21)
arbitrage.(newfield) = 1;
Can someone help me? Thanks.
采纳的回答
Walter Roberson
2018-3-4
[arbitrage.(newfield)] = deal(1);
2 个评论
Mechrod
2018-3-5
Walter Roberson
2018-3-5
arbitrage is a nonscalar struct according to the second image header line. arbitrage.(newfield) would undergo expansion as a comma separated list, as that expansion is what is defined for nonscalar struct indexed at a field (or for using {} on a nonscalar cell array with a nonscalar index). To assign to all of the comma expanded fields at the same time you need to list them in [] on the left side of an assignment.
The second half of the trick is using deal() to assign the same value to multiple variables.
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