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Originally experiments were carried out on this problem without the Steady State selection, and GE successfully found the target integral function
Sin(X)+X+X^{2}.
A comparison of cumulative frequency measures for both sets of experiments can be seen in Figure 4. With Steady State selection 87% of the runs successfully found the solution within the designated 50 generations, whereas before only 22% achieved this.
Figure 4:
Symbolic Integration cumulative frequency measure.

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