Dimension of fields in mwArray structs?

Hello,

I have a quesiton about the dimensions of the structs created by mwArray when the structs have fields.

For example,

const char *fields[] = {"field1", "field2"};

mwSize dims[2] = {2, 2};

mwArray m(2,dims, 2, fileds);

In this case, is field1 and field2 a 2x2 matrix?

What can I do if I want to have a mxn matrix in field1 and a jxk matrix in field2?

Thank you.

Answer 1

[Kaustubha Govind]

I think what you're declaring is really a 2x2 matrix of structures with two fields: field1 and field2.

You could try the alternative syntax for mwArray:

const char *fields[] = {"field1", "field2"};
mwSize dims[2] = {1, 1};
mwArray m(2,dims, 2, fields);
mwArray field1(m, n, mxDOUBLE_CLASS);
mwArray field2(j, k, mxDOUBLE_CLASS);
m.Get(fields[0],1,1).Set(field1);
m.Get(fields[1],1,1).Set(field2);

[hnde]

Thank you very much for your answers. They helped me a lot.

I have another question, somewhat unrelated.

If in matlab and in C++, the struct 'm' which holds the fields field1 and filed2 are of type DataStruct, is there any way I can convert 'm' directly to mwArray type?

Right now I am just assigning the values to the fields seperately, and I was just wondering if it is possible to cast the DataStruct type to mwArray directly?

Thank you very much.

[Kaustubha Govind]

I think you do need to assign the values explicitly - I am not aware of a way to do this directly.