15.60.2  MESH 

READ MESH [BINS] [APPEND[=ON|OFF]] [WITH] [ERRORS[=ON|OFF]]
     [FOR] {X|Y|Z}[=] N1,...,Nn [nn+1 ENDBINS]
[FOR] {X|Y|Z}[=]nn {X|Y|Z}[=] N1,...,Nn
[FOR] {X|Y|Z}[=]nn {X|Y|Z}[=] N1,...,Nn
................
[[FOR] {X|Y|Z}[=]nn ENDBINS]
               or instead of N1,...Nn
          [[FROM=n] [TO=n] [BY|WIDTH|STEP=n] [N=n]]
 
You must specify the points as an array of X,Y,Z values.  If the attribute
BINS is selected you specify the edge of the bins rather than  the  center
of the bins and the optional END marks the end of the data.