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mxIsString
Inquire if anmxArray contains a character array
integer*4 function mxIsString(pm) integer*4 pmpm 1 if the
mxArray contains a character array, 0 otherwise.
Call mxIsString to inquire whether or not the mxArray contains a character array. The DisplayMode flag tells MATLAB whether to display the mxArray in numeric form or to interpret the elements as ASCII values and to display the mxArray as a character array, if the semicolon is omitted from a MATLAB statement.
Use mxGetString and mxCreateString to extract and insert character arrays into mxArrays.
mxCreateString, mxGetString