a data input support system is provided to preliminarily remove particular error causes when genotype data are input for a program to execute linkage disequilibrium analysis or the like . by taking advantage of limiting conditions characteristic of genotype input data and the statistical properties of the entire data set , possible errors are detected by a preprocessing program , the detected errors are associated with false descriptions causing them to report the results , user input responding to the reported results is accepted , and a modified version of the input data is output .