How to access a Matlab field inside a struct from C#

Question

Assume the following in Matlab:

%variable info contains a <1x2 struct>, so...
info(1,1);
info(1,2);

%these contains fields like .a .b etc.
info(1,1).a = [1, 2, 3, 4, etc... ];
info(1,2).b = [1, 2, 3, 4, etc... ];

Now in C#:

Normally, I would do something like:

//assume I received the variable info from an output parameter
//of a MatLab function, called via InterOp
MWNumericArray fieldA = (MWNumericArray) info.GetField("a");

//Remember that info contains 1row with 2 columns

I want to access the fields from both columns

//this is what i've tried, and failed, with  the exception for data["a",1]
MWNumericArray fieldA = (MWNumericArray) data["a", 0];
MWNumericArray fieldA = (MWNumericArray) data["a", 1, 1];
MWNumericArray fieldA = (MWNumericArray) data[0];

So how do I access a field from inside a nameless struct ?

While step debugging, VisualStudio defines info as a

info = { 1x2 struct array with fields: a b }

Just to be sure, are you satisfied with the answer you found? — Dennis Jaheruddin
– Dennis Jaheruddin, Commented Dec 4, 2013 at 15:19

Terence · Accepted Answer · 2013-12-02 09:37:43Z

7

Solved by using:

MWNumericArray fieldA = (MWNumericArray) data["a", 1]; //data(1,1).a
MWNumericArray fieldB = (MWNumericArray) data["b", 1]; //data(1,1).b
fieldA = (MWNumericArray) data["a", 2]; //data(1,2).a
fieldB = (MWNumericArray) data["b", 2]; //data(1,2).b

Remember mathematicians count from 1, programmers from 0.

answered Dec 2, 2013 at 9:37

Terence

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penjepitkertasku · Accepted Answer · 2013-12-03 22:21:06Z

0

perhaps this can help :

MWNumericArray fieldA = (MWNumericArray) info.GetField("a"); //defines info as a
MWNumericArray fieldB = (MWNumericArray) info.GetField("b"); //defines info as b

MWArray resultA = fieldA[0];
MWArray resultB = fieldB[0];

show data:

System.out.println(fieldA);
System.out.println(fieldB);

answered Dec 3, 2013 at 22:21

penjepitkertasku

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