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By |Published On: September 17, 2025 at 10:02 am PDT|Last Updated: September 17, 2025 at 10:02 am PDT|

Two Survival Curves

This tutorial will show how to use the TechGraph Editor to plot data from a survival table using connecting lines in a staircase pattern.  Two survival curves are shown in this example.  Survival probability values are entered as values between 0% and 100%.  Shown below are the settings in the Data Table and the Edit Chart used to create this chart.        

Data Table – Sample data can easily be changed or replaced by pasting data from an external worksheet.
  • Graph Type is Combo.
  • X Data Type is Number.  X Data column contains the X values for Days.
  • Graph A series is set to Line and it contains the survival values (Treated)  for the first curve.
  • Graph B series is set to Line and it contains the survival values(Control)  for the second curve. Note that the X and Y data for the second curve are appended to the end of the first curve.

     Note:   Click on the “Help” button on the toolbar to find out how to edit, delete, copy and paste in the Data Table.

Edit Chart – A set of icons (Titles, Settings, X Axis, Y Axis, Curves and Error Bars) to change the settings and appearance of the chart.      

     Settings  – specify the line style for  Graph A and Graph B.         

  • Click on the “Turquoise line” (Graph Style) to show the line Style for Graph A pop-up.   You can change the Color, Thickness and Type for Graph A line.   Click on Apply to save the changes.
  • Click on the “DarkOrange line” (Graph Style) to show the line Style for Graph B pop-up.   You can change the Color, Thickness and Type for Graph B line.   Click on Apply to save the changes.
  • Check Staircase Line and Ignoring Missing Data checkboxes.

     X Axis 

  • Enter values in Minimum, Maximum and Major Div to set the X Axis scale and divisions. Leave these values empty for automatic scaling.
    • The values for this example are Minimum = 0, Maximum = 250, Major Div = 5.

     Y axis

  • Enter values in Minimum, Maximum and Major Div to set the Y Axis scale and divisions.  Leave these values empty for automatic scaling.
    • The values for this example are Minimum = -10, Maximum = 110, Major Div = 2, Minimum Start = 0 and Maximum Start = 100.

       Edit Chart Toolbar Options

  •  Print Chart prints your chart.
  •  Download Image downloads your chart as an SVG(Scalable Vector Graphics) file or image file(PNG, JPEG, TIF, PDF).
  •  Drawing Objects customize your chart with labels, lines, arrows, circles, images, and logos.
 Getting Started: