STATISTICS

Calculate a number of basic statistical quantities from the data within the current ROI e.g. mean, total counts, and standard deviation. A typical program display may be as follows:

Main menu: ENTER COMMAND [INPUT DATA]:stat
Statistics of the Region of Interest (ROI):
  DC limits: Min (    .50     ,    .50    ) Max (  100.     ,   100.    )
  Pixel number limits: Min (     1 ,     1) Max (  100 ,   100)
  Total number of data values =    100 *    100 =        10000
  Minimum data value =    1.146601
  Maximum data value =    3.099321
  Average (mean) data value =    2.000000
  Sum of data values =    20000.00
  Root mean square (RMS) value =    2.063915
  Standard deviation value =    .5096754
  Skewness parameter =    .1356223

(By changing the ROI and using STATISTICS a basic from of peak integration may be carried out. See IMAGE command, Section 15.49, Page , for the DISPLAY graphical sub-menu command STATISTICS for much more flexible polygon integration possibilities.)

The following program variables, all of data type floating point real are automatically defined by the STATISTICS command with corresponding values:

##MINIMUM Minimum data value within the ROI

##MAXIMUM Minimum data value within the ROI

##MEAN Mean (average) data value within the ROI

##TOTAL Sum of data values within the ROI

##RMS Root mean square value within the ROI

##SIGMA Standard deviation of data values within the ROI

##SKEWNESS The skewness parameter of the data values within the ROI