Fix for plot link missing due to wrong sketch estimator name.
The bug is from the difference of the sketch_estimator name of the cardinality estimator and the frequency estimator. The previous code will attach -nan to the sketch_estimator name, and that name will not be found in the directory tree. So this PR does the following:
Fix for plot link missing due to wrong sketch estimator name.
The bug is from the difference of the sketch_estimator name of the cardinality estimator and the frequency estimator. The previous code will attach -nan to the sketch_estimator name, and that name will not be found in the directory tree. So this PR does the following: