PLOT Subcommand (POWER ONEWAY ANOVA command)

The optional PLOT subcommand controls the output charts. By default, no charts are created. When the subcommand is specified, only the outputs for the following keywords are created.

All sample sizes are computed based on the specification given by the GROUP_WEIGHTS keyword of the PARAMETERS subcommand, and may be fractional.

TOTAL_N(integer1 integer2)
The optional keyword controls the two-dimensional power by total sample size chart. By default, the chart is suppressed. If specified, the chart will be displayed. When no integers are specified, the default plot range of the sample size ratio is used. When the keyword is specified, the plot boundaries are determined by integer1 and integer2, respectively. Both integer1 and integer2 are integers, separated by a blank space (or blank spaces), and must satisfy:
  • integer1 must be an integer greater than or equal to the value of 2 * (the sum of the integers specified for /PARAMETERS GROUP SIZES) / (the smallest integer specified for /PARAMETERS GROUP SIZES).
  • integer1 < integer2
  • integer2 must be an integer less than or equal to the minimum of the following two values:
    • 5000 / (the largest integer specified for /PARAMETERS GROUP SIZES) * (the sum of the integers specified for /PARAMETERS GROUP SIZES)
    • 2147483647
You can either omit or specify both numeric values.
POOLED_SD(value1 value2)
The optional keyword controls the two-dimensional power by pooled standard deviation chart. The chart is suppressed by default. When the keyword is specified, the chart displays. When no values are specified, the default plot range of the pooled standard deviation is used. When values are specified, the plot boundaries are determined by value1 and value2, respectively. Both value1 and value2 are numeric values, separated by a blank space (or blank spaces) and must satisfy 0 < value1 < value2. You can either omit or specify both numeric values.
TOTAL_N_XAXIS(integer1 integer2) POOLED_SD_YAXIS(value1 value2)
The optional keyword controls the three-dimensional power by total sample size (x-axis) and pooled standard deviation (y-axis) chart. The chart is suppressed by default. When the keyword is specified, the chart displays.
Note: integer1, integer2, value1 and value2 follow the same rules as specified for TOTAL_N and POOLED_SD.
TOTAL_N_YAXIS(integer1 integer2) POOLED_SD_XAXIS(value1 value2)
The optional keyword controls the three-dimensional power by total sample size (y-axis) and pooled standard deviation (x-axis) chart. The chart is suppressed by default. When the keyword is specified, the chart displays.
Note: integer1, integer2, value1 and value2 follow the same rules as specified for TOTAL_N and POOLED_SD.
ES(value1 value2)
The optional keyword controls the two-dimensional power by effect size chart. The chart is suppressed by default. The chart displays when the keyword is specified. The keyword is available when /PARAMETERS ES is specified, and is otherwise ignored.
  • When /PARAMETERS ES = F is specified, and no values are specified within the /PLOTS parentheses, the default plot range of the effect size is determined by the estimated power Ω versus the effect size that is measured by either f or η2.

    When the keyword is specified, the plot boundaries are determined by value1 and value2, respectively. Note that both value1 and value2 are numeric values, separated by a blank spaces, and must satisfy 0 < value1 < value2 ≤ 5. Both values can be omitted or specified.

  • When /PARAMETERS ES = ETA_SQUARED is specified, the process of specifying value1 and value2 is not available (the values are ignored if they are specified).
TOTAL_N_XAXIS(integer1 integer2) ES_YAXIS(value1 value2)
The optional keyword controls the three-dimensional power by total sample size (x-axis) and effect size (y-axis) chart. The chart is suppressed by default. The chart displays when the keyword is specified. Note that integer1, integer2, value1, and value2 follow the same rules as specified for TOTAL_N and ES.
TOTAL_N_YAXIS(integer1 integer2) ES_XAXIS(value1 value2)
The optional keyword controls the three-dimensional power by total sample size (y-axis) and effect size (x-axis) chart. The chart is suppressed by default. The chart displays when the keyword is specified. Note that integer1, integer2, value1, and value2 follow the same rules as specified for TOTAL_N and ES.