Patent ID: 8432397

Claim:
A data display apparatus for displaying a plurality of types of measurement data which are measured by a signal measurement section in a time serial manner on a predetermined coordinate system, the data display apparatus comprising: a monitor operable to display the predetermined coordinate system on a screen thereof; a processor; and a memory, the memory storing instruction which when executed cause the processor to perform as: a data type assignment section operable to assign the types of the measurement data to different coordinate axes in the predetermined coordinate system, respectively based on an assignment operation; a data input processing section operable to input thereto the measurement data belonging to the types; and a plotting processing section operable to plot characteristic values on the predetermined coordinate system on the screen of the monitor as graphics, the characteristic values specified by the measurement data synchronized at a measurement timing from the measurement data input to the data input processing section, to display a curve connecting the graphics corresponding to the characteristic values on the predetermined coordinate system on the screen of the monitor, wherein the plotting processing section plots a new characteristic value specified by the measurement data input to the data input processing section each time an updating time based on a predetermined updating period has come, updates the curve each time the new characteristic value is plotted and gradually updates and changes at least one of a shape and a color of each of the graphics as data for defining a display coordinate of each of the graphics gets newer in terms of time so as to add gradation changing from old data to new data to the graphics, and wherein the predetermined coordinate system has no time axis.