Multiple comparison graphs
Allows to visualize the influence of a qualitative (discrete) factor on another (continuous) variable.
The graph can be composed from different elements: Bars, Horizontal lines, Markers and or Connecting lines for mean or median, with choice of different error bars for mean (95% CI, 1 SEM, 1 SD, 2 SD, 3 SD, range) or median (95% CI, 25-75 percentiles, 10-90 percentiles, 5-95 percentiles, 2.5-97.5 percentiles, 1-99 percentiles, range), Box-and-whisker plot (Tukey, 1977) or Notched box-and-whisker plot (McGill et al., 1978), and/or Dot plot (display all data) (for a see full description see Data comparison graphs).
The following need to be entered in the dialog box: for Data select a continuous variable, and for Factor codes a qualitative factor. The qualitative factor may either be character or numeric codes. These codes are used to break-up the data into several subgroups.
When you want to use a continuous variable as the qualitative, discrete factor, you can convert the continuous data by using the Create groups tools.
After you have clicked the button you obtain a list of variables. In this list you can select a variable by clicking the variable's name.
Graphs: see Data comparison graphs.
If the data require a logarithmic transformation, select the Logarithmic transformation option.
After you have completed the form, click the OK button to obtain the graph.