How to plot a graph using for loop?

I have two matrices

   Matrix #1
  Rows = individual beam (Row #1 = Beam #1 = Beam A)
  Column 1 = Modulus of Elasticity, in pascals
  Column 2 = Length measurement, in inches 
  Column 3 = Width measurement, in inches
  Column 4 = Thickness measurement, in inches

   Matrix #2
   Rows = individual beam (Row #1 = Beam #1 = Beam A)
   Column 1 = Mass #1, in grams
   Column 2 = Deflection measurement for Mass #1, in inches
   Columns 3, 5, 7 and 9 = Mass #2 - #5, respectively, in grams
   Columns 4, 6, 8 and 10 = Deflection measurements for Masses #2 - #5, respectively, in inches

And I need to Create polyfit solutions for each parameter, using the data to determine the relationship between stiffness and the parameter.

 Length: (A) force versus deflection and (B) stiffness versus L
 Width:  A) force versus deflection and (B) stiffness versus W
 Thickness: (A) force versus deflection and (B) stiffness versus T 
 Modulus: (A) force versus deflection and (B) stiffness versus E

I kept getting weird look graphs. Thank you!!!

[bym]

can you provide a small sample of your data? Also, you are mixing your units which could definitely produce 'wierd look graphs'