validityIndex
(Package: tiger) :
Validity Index for fuzzy clustering
Calculate the validity index for fuzzy clusters. A validity index below 1 indicates, that in between clusters is larger than within clusters. Evaluating the validity index for various numbers of desired clusters may help to find the minimum.
● Data Source:
CranContrib
● Keywords: utilities
● Alias: validityIndex
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synth.peak.error
(Package: tiger) :
Generate synthetic peaks and peak errors
These functions allow generation of synthetic hydrologic peaks generated from a combination of exponetial functions. Also, synthetic errors for the reproduction of a reference peak can be generated in order to subsequentially test the behaviour of performance measures with respect to these errors.
● Data Source:
CranContrib
● Keywords: hplot, utilities
● Alias: p.synth.peak.error, synth.peak, synth.peak.error
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tiger
(Package: tiger) :
Calculate temporal dynamics of model performance
About fifty performance measures are calculated for a gliding window, comparing two time series. The resulting matrix is clustered, such that each time window can be assigned to an error type cluster. The mean performance measures for each cluster can be used to give meaning to each cluster. Additionally, synthetic peaks are used to better characterize the clusters.
● Data Source:
CranContrib
● Keywords: utilities
● Alias: tiger, tiger.peaks
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include.others
(Package: tiger) :
Internal Function: evaluate box plot
Find clusters with a comparable position on the box plot with respect to the best value. Comparable position means the median of one set of values falls within the interquartile range of the reference set of values
● Data Source:
CranContrib
● Keywords: utilities
● Alias: include.others
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k_hyd
(Package: tiger) :
Hydrological recession constant
This function calculates the local hydrological recession constant for each point in a time series. The function returns NA for periods with increasing discharge.
● Data Source:
CranContrib
● Keywords: utilities
● Alias: k_hyd
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k_rel
(Package: tiger) :
Mean ratio of hydrological recession constants of two discharge time series
This function calculates the mean ratio between local hydrological recession constant for each point in two discharge time series.
● Data Source:
CranContrib
● Keywords: utilities
● Alias: k_rel
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nashS
(Package: tiger) :
Calculates the (weighted) Nash Suttcliffe Efficiency coefficient
Calculates the Nash Suttcliffe Efficiency coefficient.
● Data Source:
CranContrib
● Keywords: univar, utilities
● Alias: nashS, nashS_HF
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Counts the number of elements for which two vectors show different signs in the derivative.
● Data Source:
CranContrib
● Keywords: utilities
● Alias: count.diff.direction.error
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plots
(Package: tiger) :
Evaluation plots for temporal dynamics of model performance
Create various plot to understand the temporal dynamics of model performance
● Data Source:
CranContrib
● Keywords: hplot, utilities
● Alias: box.plots, errors.in.time, p.validityIndex, peaks.in.clusters, peaks.measures, peaks.on.som, scatterplot
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to.uniform
(Package: tiger) :
Transform data to uniform distribution
Transform data to uniform distribution. Optionally, a set of values can be transformed against a reference set of data.
● Data Source:
CranContrib
● Keywords: utilities
● Alias: to.uniform
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