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

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CL
CL 2022-2-16
回答： Matt J 2022-2-16
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?

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Matt J
Matt J 2022-2-16
Ran in:
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

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