Spectral data processing apparatus and spectral data processing method

A spectral data processing apparatus in which a particular spectrum is displayed on a display on a basis of three dimensional spectral data having time, signal intensities, and a prescribed parameter, the apparatus comprising:

• a two dimensional spectrum calculating unit compiling the signal intensities for each point of the time and calculating a two dimensional spectrum of the signal intensities and the prescribed parameter, on a basis of the spectral data;
• a signal intensity-time change calculating unit calculating a change in the signal intensity over time for each value of the prescribed parameter, on a basis of the spectral data;
• and
• a display controlling unit displaying the two dimensional spectrum on the display, and displaying the change in the signal intensity over time in a superimposed manner on the display using multicolor, light and shading, or a change in brightness, in such a way that the change in the signal intensity over time is displayed to match the prescribed parameter of the two dimensional spectrum and the time changes along an axis of the signal intensities of the two dimensional spectrum.