Abstract: A data analysis apparatus according to the embodiment includes factor data collection means for collecting factor data assumed to affect to-be-predicted data serving as an objective variable; and generation means for calculating a corrected partial differential value of a change in a value of the factor data based on a degree of influence of a factor on the objective variable, which is a characteristic of the change in the value of the factor data, for each type of the factor data collected by the factor data collection means and generating an explanatory variable based on the corrected partial differential value.

Abstract: A time feature value calculation apparatus according to an embodiment includes an interpolation unit (182) and a time feature value calculation unit (183). In accordance with a variability tendency of a biological signal exhibited in time-series data of the biological signal resulting from an abnormality value process performed to eliminate an abnormality value from the biological signal in response to an input of the biological signal having periodicity, the interpolation unit interpolates a missing value in the biological signal in the time-series data of the biological signal resulting from the abnormality value process. The time feature value calculation unit calculates a time feature value focusing on the variability tendency of the biological signal measured over an arbitrary time period, from the interpolated time-series data of the biological signal.