2.5.5. Graph 2D “profile”

It consists in partitioning the “x” axis with a number of bins and in plotting, for each segment, the mean value in blue and the standard deviation by a black line. The number of segments N is passed as an option with the formalism nclass=N. We can also visualise the scatterplot just below the profile plot, by adding the option “same” (resulting in the red points also shown in Figure 2.47).

    TDataServer * tdsGeyser = new TDataServer("tdsgeyser", "Geyser database");
    tdsGeyser->fileDataRead("geyser.dat");
    tdsGeyser->drawProfile("x2:x1","","same");

Figure 2.47 Scatterplot between attributes x1 and x2 of the TDataServer geyser.