Machine-implemented method and electronic device for presenting a dual-axis graph

An electronic device capable of presenting a dual-axis graph for a pair of data sets using instructions from a non-transitory computer readable medium, the dual-axis graph having a pair of independent and parallel first and second reference axes, and a shared axis intersecting the first and second reference axes, each of the data sets having a plurality of data points, each of the data points including a numerical first coordinate and a second coordinate, said electronic device comprising:

• the non-transitory computer readable medium for storing the data sets;
• a user interface for allowing user input of an input instruction associated with the data sets;
• a reader coupled to said user interface to receive the input instruction, and reading the data sets in accordance with the input instruction;
• an E-value calculating module coupled to said reader, and which, for each of the data sets, calculates an E-value, the E-value being a scaled function of a range of values of the first coordinates of the data points;
• a boundary-setting module coupled to said E-value calculating module, said boundary-setting module designating the data set with the larger E-value as a first data set, and the data set with the smaller E-value as a second data set, setting a first boundary of the first reference axis to be equal to the first coordinate of one of the data points of the first data set having a maximum value, and a second boundary of the first reference axis to be equal to the first coordinate of one of the data points of the first data set having a minimum value, and setting first and second boundaries of the second reference axis by designating the first coordinate of one of the data points of the second data set having a maximum value and the first coordinate of one of the data points of the second data set having a minimum value as an initial first boundary and an initial second boundary of the second reference axis, respectively, and adjusting one of the initial first boundary and the initial second boundary of the second reference axis to thereby obtain final first and second boundaries of the second reference axis, wherein an E-value calculated based on the final first and second boundaries of the second reference axis corresponds to the E-value of the first data set;
• and
• a graph-presenting module coupled to said reader and said boundary-setting module, said graph-presenting module plotting on a same coordinate plane the data points of the first data set with reference to the first reference axis and the shared axis, and the data points of the second data set with reference to the second reference axis and the shared axis
• wherein said boundary-setting module performs one of the following steps:
• (i) designating the first coordinate of said one of the data points of the second data set having the maximum value as the final first boundary of the second reference axis, and a product of the first coordinate of said one of the data points of the second data set having the maximum value and a ratio value obtained between the first coordinate of said one of the data points of the first data set having the maximum value and the first coordinate of said one of the data points of the first data set having the minimum value as the final second boundary of the second reference axis;
• and
• (ii) designating the first coordinate of said one of the data points of the second data set having the minimum value as the final second boundary of the second reference axis, and a product of the first coordinate of said one of the data points of the second data set having the minimum value and a ratio value obtained between the first coordinate of said one of the data points of the first data set having the maximum value and the first coordinate of said one of the data points of the first data set having the minimum value as the final first boundary of the second reference axis.

A computer program product comprising a non-transitory machine-readable data storage medium including program instructions for causing an electronic device to execute consecutive steps of a machine-implemented method for presenting a dual-axis graph for a pair of data sets, the dual-axis graph having a pair of independent and parallel first and second reference axes, and a shared axis intersecting the first and second reference axes, each of the data sets having a plurality of data points, each of the data points including a numerical first coordinate and a second coordinate, said machine-implemented method comprising:

• a) reading the pair of the data sets;
• b) for each of the data sets, calculating an E-value, the E-value being a scaled function of a range of values of the first coordinates of the data points;
• c) designating the data set with the larger E-value as a first data set, and the data set with the smaller E-value as a second data set;
• d) setting a first boundary of the first reference axis to be equal to the first coordinate of one of the data points of the first data set having a maximum value, and a second boundary of the first reference axis to be equal to the first coordinate of one of the data points of the first data set having a minimum value;
• e) setting first and second boundaries of the second reference axis by designating the first coordinate of one of the data points of the second data set having a maximum value and the first coordinate of one of the data points of the second data set having a minimum value as an initial first boundary and an initial second boundary of the second reference axis, respectively, and adjusting one of the initial first boundary and the initial second boundary of the second reference axis to thereby obtain final first and second boundaries of the second reference axis, wherein an E-value calculated based on the final first and second boundaries of the second reference axis corresponds to the E-value of the first data set;
• and
• f) plotting on a same coordinate plane the data points of the first data set with reference to the first reference axis and the shared axis, and the data points of the second data set with reference to the second reference axis and the shared axis,
• wherein step e) includes one of:
• e1) designating the first coordinate of said one of the data points of the second data set having the maximum value as the final first boundary of the second reference axis, and a product of the first coordinate of said one of the data points of the second data set having the maximum value and a ratio value obtained between the first coordinate of said one of the data points of the first data set having the maximum value and the first coordinate of said one of the data points of the first data set having the minimum value as the final second boundary of the second reference axis;
• and
• e2) designating the first coordinate of said one of the data points of the second data set having the minimum value as the final second boundary of the second reference axis, and a product of the first coordinate of said one of the data points of the second data set having the minimum value and a ratio value obtained between the first coordinate of said one of the data points of the first data set having the maximum value and the first coordinate of said one of the data points of the first data set having the minimum value as the final first boundary of the second reference axis.