calibrate_svd

Function to estimate the layer parameters using the approach proposed by Meju (1992)

calibrate_svd(ves, par0, iterations = 100, ireport = 10, trace = TRUE)

Arguments

ves

A vertical electrical sounding object
par0

A numeric vector with the initial values of resistivities and thicknesses
iterations

An integer specifying the maximum number of iterations
ireport

An integer specifying the report interval
trace

A logical flag to indicate if the optimization information must be traced

Value

This function returns a list with the following entries:

  • par: A numeric vector with the values of the layer resistivities and thicknesses

  • value: The value or the RSS (Residual sum of squares)

  • rel.error: The value of the relative error (in percentage)

  • cal.error: A matrix with the RSS and relative error at each iteration

References

Meju, M. An effective ridge regression procedure for resistivity data inversion. Computers and Geosciences, 18(2-3), 99-119, 1992.

See also

Other calibration functions: calibrate_ilsqp, calibrate_joint_nls, calibrate_nls, calibrate_seq_joint_nls, calibrate_step_nls, calibrate_step, calibrate, log_mnad_resistivity, log_mxad_resistivity, log_rss_resistivity, mnad_resistivity, mxad_resistivity, relative_error_resitivity, rss_resistivity