How to prevent Matlab from rounding off a column to zero?

I have a 10x2 matrix called I where the first column is just the integar index from 1:10, and the second column contains the actual values which happen to be of very small magnitude (~1e-8). Somehow if the matrix stores both the indexes (1:10) and the values, the values get all rounded off to zero. Only if I remove the index then Matlab can display the values properly without rounding off.

How to go about showing both the integar indexes column and a column of values of small magnitude?

Answer 1

[Matt J]

You could use format long. Or, since it's just for display purposes, you can display it as a table,e g.

A=(1:5)';A=[A,1e10*A]

A = 5×2

1.0e+10 * 0.0000 1.0000 0.0000 2.0000 0.0000 3.0000 0.0000 4.0000 0.0000 5.0000

array2table(A)

ans = 5×2 table
    A1     A2  
    __    _____

    1     1e+10
    2     2e+10
    3     3e+10
    4     4e+10
    5     5e+10