1.8 How to Apply Different Methods and Algorithms to the Same Data Series in the Same Subplot

As an example, we chose the direct comparison of the regular derivative with the five point derivative within the same subplot. Figure 8.79 shows the ‘Select Plot’-window. The regular derivative is in the pipe for subplot one. In the pipe for the first extra calculation is the five point derivative. The input line for the first subplot shows two times the data series with the ID 14.1. The second ID got an extra suffix (‘;E1’). This suffix means that the calculations that are in the pipe for the first extra calculation (E1) are applied to the data series. There are three options in applying the extra calculations. First, the extra calculations can replace the plot calculations (subplot pipe). Second the extra calculations can be performed before the plot calculations. Third, they can be performed after the plot calculations.

Two different extra calculations can be chosen (E1 and E2), therefore the following combinations are possible:

Apply the first extra calculation : ID;E1
Apply the second extra calculation : ID;E2
Apply the first and the second extra calculation : ID;E1E2
Apply the second and the first extra calculation : ID;E2E1

Figure 8.80 shows the derivative and the 5 point derivative of ID 14.1. After some zooms (see Figure 8.81) it is possible to see that the variance of the 5 point derivative is smaller than the variance of the derivative.

Figure 8.79: ‘Select Plot’-window

Figure 5.80: Plot of the derivative and the 5 point derivative

Figure 5.81: Detail of derivative and the 5 point derivative

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