 I have the following data table:

     [,1] [,2] [,3] [,4] [,5]
[1,] 2575 1927 1754  581  354
[2,] 1156  810  730  541  237
[3,]  417  297  199  125  110
[4,]  281  132  132   47   58
[5,]  152   84   87   54   19

Each column represents a time interval expressed in nano-seconds
Each row represents an energy interval expressed m=n MeV
Each table value represents the average gamma rays intensity measured during the time interval identified by the column and
the energy range identified by the row.
The Energy marginal has been fitted through a Gamma curve with parameters (alpha = 1.85342, beta = 348.18)
The Time  marginal has been fitted through a Weibull curve with parameters (alpha = 0.334489, beta = 9.14066) 

The scaling factor = 1403.88. 

My goal is:
1. to generate and plot the 2D surface which is generated by the product of the two curves (like Bezier surfaces)
2. to generate a 3D stairsplot of the above table
3. *ideally* to draw the generated product surface *and* the 3D stairplot in the same plot 

I had a look at graphic functions (persp, plot3D, sctterplot3d) but I feel intimidated. I have to sample somehow the two curves 
to generate the product surface ... maybe using tensors ?
Please, help.
Thank you.
Maura 
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