3D plot using spreadsheet file

Hi,

I am trying to Plot a 3D graph using data from a spreadsheet file. 1st column: x values: 300points 2nd column: y values - less than 300 points 3rd-last column : z values - there are 300 columns corresponding to 300 x axis values. y and z has same no of data.(for each x value there is a column for y and column for z)

How do I make a 3D graph out of these values. Thank you in advance

[Azzi Abdelmalek]

Do you have 3 columns or 300?