MATLAB Application Program Interface Reference

Get an mxArray's imaginary data elements

integer*4 function mxGetPi(pm)
integer*4 pm

Arguments

Pointer to an mxArray.

Returns

The imaginary data elements of the specified mxArray, on success. Returns 0 if there is no imaginary data or if there is an error.

Description

The pi field points to an array containing the imaginary data of the mxArray. Call mxGetPi to get the contents of the pi field; that is, to get the starting address of this imaginary data.

The best way to determine if an mxArray is purely real is to call mxIsComplex.

The imaginary parts of all input mxArrays to a MATLAB function are allocated if any of the input mxArrays is complex.

If you use mxGetPr or mxGetPi, note that mxFreeMatrix frees pr and pi using mxFree, so pr and pi should only be set to memory allocated with mxCalloc.