Apparently there is no way of directly making a xyz coordinates graph in Excel. (other post)
Does anyone now of free software that can?
Or a good work around in excel
Example data: (this should appear as a pointed mountain on a surface graph).
Xcoord    Ycoord    Zcoord
255    500    186
254    501    200
255    501    489
256    501    180
253    502    100
254    502    400
255    502    1024
256    502    350
257    502    87
254    503    220
255    503    500
256    503    200
254    504    145
255    504    110
255    505    50