Input data correction

1. A computer-implemented method comprising:

receiving, by a processor, a time-series data input by a user;

computing, by the processor, a first predicted value based on the time-series data;

determining, by the processor, an estimated time-series data based on the time-series data input by the user;

computing, by the processor, a second predicted value based on the estimated time-series data;

determining, by the processor, a defect in the time-series data input by the user based on a difference between the first predicted value and the second predicted value;

determining, by the processor, a cause of the defect in the time-series data automatically by using a machine learning algorithm; and

computing, by the processor, a revised predicted value for the user based on the estimated time-series data in response to receiving a selection of the estimated time-series data from the user.

2. The computer-implemented method of claim 1 , further comprising displaying, by the processor, a prompt for the user, the prompt displaying the cause of the defect.

3. The computer-implemented method of claim 1 , further comprising displaying, by the processor, a prompt for the user, the prompt displaying the cause of the defect and the estimated time-series data to be used instead of the time-series data input by the user.

4. The computer-implemented method of claim 3 , further comprising, in response to the user selecting the estimated time-series data:

displaying, by the processor, the revised predicted value.

5. The computer-implemented method of claim 1 , further comprising determining that the cause of the defect is one from a group of causes consisting of the user under-reporting the time-series data, the user over-reporting the time-series data, and a sensor malfunction.

6. A system comprising:

a memory; and

a processor coupled with the memory, the processor configured to:

receive a time-series data input by a user;

compute a first predicted value based on the time-series data;

compute an estimated time-series data for the user based on the time-series data;

compute a second predicted value based on the estimated time-series data;

determine, automatically by using a machine learning algorithm, a defect in the time-series data input by the user based on a difference between the first predicted value and the second predicted value;

and

display a prompt for the user, the prompt displaying a cause of the defect and the estimated time-series data to be used instead of the time-series data input by the user.

7. The system of claim 6 , the processor further configured to, in response to the user selecting the estimated time-series data:

compute a revised predicted value based on the estimated time-series data; and

display the revised predicted value.

8. The system of claim 6 , the processor further configured to determine that the cause of the defect is one from a group of causes consisting of the user under-reporting the time-series data, the user over-reporting the time-series data, and a sensor malfunction.

9. A computer program product for correcting input data the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processing circuit to cause the processing circuit to:

receive a time-series data input by a user;

compute a first predicted value based on the time-series data input by the user;

compute a second predicted value based on an estimated time-series data, the estimated time-series data computed based on the time-series data input by the user;

determine a defect in the time-series data input by the user by using a machine learning algorithm based on a difference between the first predicted value and the second predicted value; and

replace the time-series data input by the user with the estimated time-series data.

10. The computer program product of claim 9 , the program instructions further executable to cause the processing circuit to: display a prompt for the user, the prompt displaying a cause of the defect, and the estimated time-series data to be used instead of the time-series data input by the user.

11. The computer program product of claim 10 , the program instructions further executable to cause the processing circuit to determine that the cause of the defect is one from a group of causes consisting of the user under-reporting the time-series data, the user over-reporting the time-series data, and a sensor malfunction.

12. The computer program product of claim 9 , wherein the estimated time-series data is computed using Kalman filtering.

13. A computer-implemented method comprising:

receiving, by a processor, a time-series data input by a user;

computing, by the processor, a first plurality of predicted values based on the time-series data input by the user;

computing, by the processor, a second plurality of predicted values by:

determining estimated time-series data based on the time-series data input by the user; and

computing the second plurality of predicted values based on the estimated time-series data;

determining, by the processor, a defect in the time-series data input by the user based on a distribution of a plurality of differences between respective values from the first plurality of predicted values and the second plurality of predicted values; and

determining, by the processor, a cause of the defect in the time-series data automatically by using a machine learning algorithm based on the distribution of the plurality of differences.

14. The computer-implemented method of claim 13 , wherein determining the defect in the time-series based on the distribution of the plurality of differences comprises determining if the distribution is Gaussian.

15. The computer-implemented method of claim 13 , further comprising displaying, by the processor, a prompt for the user, the prompt displaying the cause of the defect and the estimated time-series data to be used instead of the time-series data input by the user.

16. The computer-implemented method of claim 15 , further comprising, in response to the user selecting the estimated time-series data:

computing, by the processor, a revised predicted value based on the estimated time-series data; and

displaying, by the processor, the revised predicted value.

17. A system comprising:

a memory; and

a processor coupled with the memory, the processor configured to:

receive a time-series data input by a user;

compute a first plurality of predicted values based on the time-series data input by the user;

compute a second plurality of predicted values by:

determining estimated time-series data based on the time-series data input by the user; and

computing the second plurality of predicted values based on the estimated time-series data; and

determine a defect in the time-series data input by the user based on a distribution of a plurality of differences between respective values from the first plurality of predicted values and the second plurality of predicted values automatically by using a machine learning algorithm.

18. The system of claim 17 , the processor further configured to:

display, via a prompt, a cause of the defect and the estimated time-series data to be used instead of the time-series data input by the user; and

in response to the user selecting the estimated time-series data:

compute a revised predicted value based on the estimated time-series data; and

display the revised predicted value.