S-curves, inverse S-curves and histograms are all referred to as 窶徭imple plots窶. Such plots are produced using data from a single data node. On a color monitor, the plots will be drawn with the same color as the corresponding data node.
DynRisk allows you to produce any combination of the three simple plot types in the same diagram.
Moreover, you can copy curves from one plot window and paste it into another using the 窶廚opy窶 and 窶弃aste窶 commands. If you do this, make sure that both plots have the same scale by using the 窶彜et scale窶 command. You can also choose different colors on the different data nodes making it possible to distinguish between their respective curves.
Note also that you can add 窶徃ridlines窶 to the plots corresponding to certain key statistics for the data node. Specifically, you can have gridlines indicating the location of the following statistics:
窶｢ Base value
窶｢ Mean ﾂｱ st.dev.
窶｢ Fractiles
The fractiles are chosen according to the currently selected fractile set. You can change this using the 窶廡ractiles窶ｦ窶 command.
To display the gridlines, click anywhere in the plot window while pressing the 窶廚ommand窶 key on the keyboard. This will bring up a popup menu from which you could select the desired statistics. To hide the gridlines, just repeat the same procedure.
S-curve
An 窶彜-curve窶 is a graph with the cumulative observed frequency along the Y-axis as a function of the output values along the X-axis. That is, for a given value on the X-axis, the corresponding value on the Y-axis is equal to the observed frequency of output values less than or equal to the chosen value on the X-axis. The S-curve is an estimate of the cumulative probability distribution function of the output value.
If the frontmost window is a main document window for a simulation data file, the 窶彜-curve窶 button produces S-curve plots for all selected data nodes.
If the frontmost window is a 窶徭imple plot窶 window created by using the 窶彜-curve窶 button, this button is disabled. In this case the window title is of the form:
<node>.s
where <node> is the name of the node whose S-curve is plotted.
If the frontmost window is a 窶徭imple plot窶 window created by using either the 窶廬nverse S-curve窶 button or the 窶廩istogram窶 button, the 窶彜-curve窶 button is used to either hide or show an 窶彜-curve窶 depending on the state of the window. If the plot already contains an S-curve, you can use the 窶彜-curve窶 button to hide this curve. On the other hand, if the plot does not contain an S-curve, then you can use the 窶彜-curve窶 button to show it.
Inverse S-curve
An 窶廬nverse S-curve窶 is a graph with 1 minus the cumulative observed frequency along the Y-axis as a function of the output values along the X-axis. That is, for a given value on the X-axis, the corresponding value on the Y-axis is equal to the observed frequency of output values greater than the chosen value on the X-axis.
If the frontmost window is a main document window for a simulation data file, the 窶廬nverse S-curve窶 button produces inverse S-curve plots for all selected data nodes.
If the frontmost window is a 窶徭imple plot窶 window created by using the 窶廬nverse S-curve窶 button, this button is disabled. In this case the window title is of the form
<node>.inv
where <node> is the name of the node whose inverse S-curve is plotted.
If the frontmost window is a 窶徭imple plot窶 window created by using either the 窶彜-curve窶 button or the 窶廩istogram窶 button, the 窶廬nverse S-curve窶 button is used to either hide or show an 窶彿nverse S-curve窶 depending on the state of the window. If the plot already contains an inverse S-curve, you can use the 窶廬nverse S-curve窶 button to hide this curve. Conversely, if the plot does not contain an inverse S-curve, then you can use the 窶廬nverse S-curve窶 button to show it.
Histogram
A 窶廩istogram窶 is a graph where the X-axis is divided into a suitable number of equally sized intervals. (DynRisk uses 20 such intervals.) For each of these intervals the corresponding frequency of observed output values is calculated. The derived frequencies are displayed as a 窶廚olumn chart窶 with one column for each interval on the X-axis. The height of a column represent the observed frequency in the corresponding interval. The Histogram is an estimate of the probability density function of the output value.
If the frontmost window is a main document window for a simulation data file, the 窶廩istogram窶 button produces histogram plots for all selected data nodes.
If the frontmost window is a 窶徭imple plot窶 window created by using the 窶廩istogram窶 button, this button is disabled. In this case the window title is of the form:
<node>.h
where <node> is the name of the node whose histogram is plotted.
If the frontmost window is a 窶徭imple plot窶 window created by using either the 窶彜-curve窶 button or the 窶廬nverse S-curve窶 button, the 窶廩istogram窶 button is used to either hide or show a 窶徂istogram窶 depending on the state of the window. If the plot already contains a histogram, you can use the 窶廩istogram窶 button to hide this curve. Conversely, if the plot does not contain a histogram, then you can use the 窶廩istogram窶 button to show it.
