Is there a way to solve wrong results when using (mod) operation?
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Hi all,
I am working with many (mod) operations to create my own functions in matlab. However, I face a problem of wrong results that are appears. For example,
***** Manuale calculations ***********
temp = (16667 * 16667 * 16667 ) = 4629907412963
temp = = 2533 * 4629907412963 = 11727555477035279
temp = temp % 25000
temp = 10279
***** Matlab calculations ***********
temp = (16667 * 16667 * 16667 )
temp = 2533 * 4.6299e+12
temp = 1.1728e+16
temp = mod (1.1728e+16 , 25000)
temp = 10280
******************************
As you can see, there are two different results even it is just one value! Also I have another
example with a huge difference between the two results.
Is there a convenient way to solve this issue?
Thanks in advance!
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采纳的回答
Walter Roberson
2014-4-20
You could work with int64 or uint64 datatype. That would postpone the problem.
To solve the problem (for most practical purposes) you would need to switch to a high precision arithmetic system, such as using the symbolic toolbox or using John D'Errico's File Exchange contribution "VPI"
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