int SetByText(LPCSTR pTxt, char cSep = ',', double dMissing=0);

Parameter:
pTxt = [input] a blog of numbers separated be a token separator and lines by LF or CRLF
cSep = [input] token separator character
dMissing = [inpit] when token empty of non-numeric, use this value
Return:
Return 0 if no error, otherwise < 0 error codes

Example:

void st(string str="1,2,3\r\n2,3,4\r\n7,8,9\r\n")
{
	matrix<int> mm;
	mm.SetByText(str);
	Worksheet wks = Project.ActiveLayer();
	mm.CopyTo(wks);//default will transpose
}