User`s guide

SdfXdata
Syntax int SdfXdata (short fn, long offset, short dataNo,
short rowNo, short colNo, long pnts, short dataType,
float far *x);
Returns an integer(short) of zero or minus one. A return of 0 indicates no error; a return of
-1 indicates an error.
This function reads X-axis data from an open SDF file and puts it in an array, where x is the pointer to the
array, and fn is the number of the open SDF file (for details, see SdfOpen).
An xdata header is only included in the SDF file for data types that use arbitrary X-axis spacing,
otherwise all X-axis spacing is defined by fields in the data record header.
The xdata header contains all of the X-axis data for a single vector and corresponds to the equivalent
ydata header.
Note See SdfYdata for a list of valid dataTypes and for a description of the parameters used
with this function.
Using SDF Data with C Programs
SdfXdata
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