jsonecode doesn't support complex doubles

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Alexander DeWitt
Alexander DeWitt 2022-2-22
评论： Alexander DeWitt 2022-2-22
After a few error messages about encoding objects of class double, I figuered out that my highlevel structs had a field that contianed complex doubles, and therefore couldn't be encoded. So, I was wondering:
Is there a particular reason that complex doubles aren't supported by jsonecode?
If the reason isn't a lack of general consenus on default encoding of complex doubles in JSON, what is the convention?
Thanks,

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采纳的回答

Ive J
Ive J 2022-2-22
Ran in:
Here says:
"JSON has no standard way to represent complex numbers, so there is no way to test for them in JSON Schema."
Here also, you'll find more:
www.mathworks.com/help/compiler_sdk/mps_restfuljson/json-representation-of-matlab-data-types.html
You have two (maybe more?) options:
x.a = 1 + 2i;
% 1st
mps.json.encode(x)
ans = '{"a":{"mwcomplex":true,"mwdata":[1,2],"mwsize":[1,1],"mwtype":"double"}}'
% 2nd
y = x;
y.a = string(y.a);
jsonencode(y)
ans = '{"a":"1+2i"}'
% error
jsonencode(x)
Error using jsonencode
Unable to encode objects of class double as JSON-formatted text.
  1 个评论
Alexander DeWitt
Alexander DeWitt 2022-2-22
Thanks for the complete answer. I was moving in that direction, but I'm glad I checked and got the full background information.

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