External Interfaces/API Reference    
mxGetFieldByNumber

Get a field value, given a field number and an index in a structure array

Fortran Syntax

Arguments

pm
   Pointer to a structure mxArray.

index
   The desired element. The first element of an mxArray has an index of 1, the second element has an index of 2, and the last element has an index of N, where N is the total number of elements in the structure mxArray.

fieldnumber
   The position of the field whose value you want to extract. The first field within each element has a field number of 1, the second field has a field number of 2, and so on. The last field has a field number of N, where N is the number of fields.

Returns

A pointer to the mxArray in the specified field for the desired element, on success. Returns zero if passed an invalid argument or if there is no value assigned to the specified field. Common causes of failure include:

Description

Call mxGetFieldByNumber to get the value held in the specified fieldnumber at the indexed element.

Calling

is equivalent to calling

where index is 1 if you have a one-by-one structure.

See Also

mxGetField, mxGetFieldNameByNumber, mxGetNumberOfFields, mxSetField, mxSetFieldByNumber


  mxGetField mxGetFieldNameByNumber