Scatter Plot
To create a Scatter Plot after a Probabilistic analysis in RocPlane:
- Select Statistics > Plot Scatter or the Plot Scatter
toolbar button. - Select the Data Type you would like to plot on the X-axis and Y-axis.
- To display the best fit linear Regression Line, select the Show Regression Line check box.
- Click OK.
The Scatter Plot will be generated. At the bottom of the Scatter Plot, you will see a listing of the Correlation Coefficient, alpha and beta.
Correlation Coefficient
The Correlation Coefficient indicates the degree of correlation between the two variables plotted. The Correlation Coefficient can vary between -1 and 1. Numbers close to zero indicate a poor correlation, and numbers close to 1 or -1 indicate a strong correlation. Note that a negative correlation coefficient simply means that the slope of the best-fit linear regression line is negative.
Alpha and Beta
Alpha and beta represent the y-intercept and slope, respectively, of the best-fit linear regression line to the scatter plot data. The linear regression line can be displayed on the plot by selecting the Show Regression Line option.
Right-Click Options
Several viewing options are available when generating a Scatter plot. These options are available on the Chart menu and/or the right-click menu.