Calculating accuracy of decimal places and print out the values

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Lorenne 2018-5-6

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评论： Walter Roberson 2018-5-10

How to find the accuracy of decimal places between the integral approximation and the MATLAB built-in integral function? Eg: if my approximation is 0.50000000 and the true value is 0.52359878, and error is 0. 0 2359878, there is one 0 in front of the error value, '0.0', so the Decimal place will be 1, and when approximation is 0.51666667, error will be 0. 00 693211, there is two 0 , so decimal place will be 2.

Also, how do i only print the approximation and the error values when the decimal place has increased by 1?

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Walter Roberson 2018-5-10

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Answer 1

Ameer Hamza 2018-5-6

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编辑：Ameer Hamza 2018-5-6

在 MATLAB Online 中打开

You can use the following formula to calculate the number of zeros after decimal position and first non-zero digit

floor(-log10(error))

To only print when accuracy is increased do the following

bestAccuracy = 0;
while bestAccuracy < 10
  integralValue = % calculate your integral here
  error = % calculate yor error here
  accuracy = floor(-log10(error));
  if accuracy > bestAccuracy
    bestAccuracy = accuracy;
    disp(error);
  end
end