Color display of related parameters

A method for producing a color display containing information relating to three related but independently variable parameters, comprising:

• producing signals representing successive values of each parameter with respect to a common time scale;
• applying the signals associated with a first one of the parameters to a color display device for producing a trace which varies with respect to a base line, with successive points along the base line corresponding to successive values of the first parameter;
• applying the signals associated with a second one of the parameters to the color display device for causing the amplitude of the trace perpendicular to the base line to be a function of successive values of the second parameter at successive points along the base line;
• and
• applying the signals associated with the third one of the parameters to the color display device for causing the device to display a succession of sets of at least one colored point, each set corresponding to a respective successive point along the base line, the hue of the colored points of the sets being a function of successive values of the third parameter at successive points along the path.

Apparatus for producing a color display containing information relating to three related but independently variable parameters, comprising:

• first means for producing signals representing successive values of each parameter with respect to a common time scale;
• and
• second means electrically connected to the first means for visually depicting information derived from the signals, the second means including
• means responsive to the signals associated with a first one of the parameters for producing a trace which varies with respect to a base line, with successive points along the base line corresponding to successive values of the first parameter,
• means responsive to the signals associated with a second one of the parameters for causing the amplitude of the trace perpendicular to the base line to be a function of successive values of the second parameter at successive points along the path, and
• means responsive to the signals associated with the third one of the parameters for causing a succession of sets of at least one colored point to be displayed, each set corresponding to a successive point along the base line, the hue of the colored points of the sets being a function of successive values of the third parameter at successive points along the path.