output.file 
x_min (normally 0)
y_min (normally 0)
x_step (normally 1)
y_step (normally 1)
x_cnt (number of rows of input)
y_cnt (number of columns of input)
data11 data12 data13 data14 .... (x by y matrix of doubles)
data21 data22 data23 ....
.
.
.
datax1 datax2 ... dataxy
Number of header lines (multiple header lines available)
header1
header2
...
Number of header lines (multiple header lines available)
foot1
foot2
...
Title of x-axis
Title of y-axis
Title of z-axis
xlabel0 (x_cnt number of labels for ticks along x-axis)
...
xlabelx
ylabel0 (y_cnt number of labels for ticks along y-axis)
...
ylabely