Data arithmatic addition with single precision
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Hello
I am adding 21 elements of an array by two different methods. The two methods should show same value. But while printing the results the are different. Please suggest.
clc
clear all
close all
x=rand(1,100)*10^16;
x = single(x)
method1 = sum(x(1:21))+x(22)-x(1);
method2 = sum(x(2:22));
sprintf('%f',method1)
sprintf('%f',method2)
Regards,
Gagarin
回答（1 个）
James Tursa
2019-9-27
编辑：James Tursa
2019-9-27
0 个投票
Floating point operations will often yield slightly different results if you change the order of operations. This is to be expected.
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2019-9-27
2019-9-27
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