type    xy
heading A graph with grid lines
xgrid
x       123 234 196 349 453 98   294
dx      12  34  23  32  12  7.5  11.2
ygrid
y       12  65  84  47  23  91   17
dy      1.4 4.6 7.3 6.2 4.1 11.6 7.5