documentclass[10pt,twocolumn,letterpaper]{article}

usepackage[table]{xcolor}
usepackage{pgfplotstable}

%for confusion table

pgfplotstableset{
precision=1,
fixed,
fixed zerofill,
/color cells/min/.initial=0,
/color cells/max/.initial=1000,
/color cells/textcolor/.initial=,
%
% Usage: 'color cells={min=<value which is mapped to lowest color>,
%   max = <value which is mapped to largest>}
color cells/.code={%
    pgfqkeys{/color cells}{#1}%
    pgfkeysalso{%
        postproc cell content/.code={%
            %
            begingroup
            %
            % acquire the value before any number printer changed
            % it:
            pgfkeysgetvalue{/pgfplots/table/@preprocessed cell content}value
            ifxvalueempty
                endgroup
            else
            pgfmathfloatparsenumber{value}%
            pgfmathfloattofixed{pgfmathresult}%
            letvalue=pgfmathresult
            %
            % map that value:
            pgfplotscolormapaccess
                [pgfkeysvalueof{/color cells/min}:pgfkeysvalueof{/color cells/max}]
                {value}
                {pgfkeysvalueof{/pgfplots/colormap name}}%
            % now, pgfmathresult contains {<R>,<G>,<B>}
            %
            % acquire the value AFTER any preprocessor or
            % typesetter (like number printer) worked on it:
            pgfkeysgetvalue{/pgfplots/table/@cell content}typesetvalue
            pgfkeysgetvalue{/color cells/textcolor}textcolorvalue
            %
            % tex-expansion control
            % see http://tex.stackexchange.com/questions/12668/where-do-i-start-latex-programming/27589#27589
            toks0=expandafter{typesetvalue}%
            %%% my try to replicate the header row starts here
            xdefIII{0}
             ifnumIII=pgfplotstablecolrelax
                 defaddedContent{ pgfplotstablecolname  &}%
             else
                 defaddedContent{}%
             fi
            %%% my try ends here: problem, I dont have access to the column header names
            xdeftemp{%
                noexpandpgfkeysalso{%
                    @cell content={%
                        addedContent
                        noexpandcellcolor[rgb]{pgfmathresult}%
                        noexpanddefinecolor{mapped color}{rgb}{pgfmathresult}%
                        ifxtextcolorvalueempty
                        else
                            noexpandcolor{textcolorvalue}%
                        fi
                        thetoks0 %
                    }%
                }%
            }%
            endgroup
            temp
            fi
        }%
    }%
},
  every head row/.style={
 before row=&,
  },
  every first column/.style={
      column type/.add={c}{},
  },
}



begin{document}
begin{table}
caption{What I have}
centering
setlength{tabcolsep}{1pt}
pgfplotstabletypeset[
    /pgfplots/colormap={CM}{color=(white) rgb255=(255,170,0)},
    color cells={min=0,max=100,textcolor=black},
    col sep=space,row sep=\
]{A E F I \
98.07692 9.25926 2.33516 0.00000\
0.00000 74.07407 3.02198 0.00000\
0.00000 0.00000 58.79121 0.00000\
0.00000 3.70370 1.64835 100.00000\
}
end{table}
end{document}