seismic.operate {RGeostats}R Documentation

Perform operations on the seismic attributes

Description

Perform operations on the seismic attributes

Usage

seismic.operate(db, oper = 0, radix = "Oper", modify.target = db.locmod())

Arguments

db

The db-class containing the seismic attributes to be transformed

oper

Type of the operation

  • 0: no operation

  • 1: absolute value = |v[i]|

  • 2: signed square root = sign(v[i]) * sqrt(v[i])

  • 3: square = v[i] * v[i]

  • 4: signed square = sign(v[i]) * v[i] * v[i]

  • 5: signum function = sign(v[i])

  • 6: exponentiate = exp(v[i])

  • 7: signed natural log = sign(v[i]) * log(|v[i]|)

  • 8: signed common log = sign(v[i]) * log10(|v[i]|)

  • 9: cosine = cos(v[i])

  • 10: sine = sin(v[i])

  • 11: tangent = tan(v[i])

  • 12: hyperbolic cosine = cosh(v[i])

  • 13: hyperbolic sine = sinh(v[i])

  • 14: hyperbolic tangent = tanh(v[i])

  • 15: divide trace by its maximum Value = v[i] / max(v[i])

  • 16: decibel = 20 * sign(v[i]) * log10(|v[i]|)

  • 17: negate value = -v[i]

  • 18: pass only positive values = max(0.,v[i])

  • 19: pass only negative values = min(0.,v[i])

  • 20: sum trace integration = sum(k<=i) (v[k]) / (2*dt)

  • 21: diff trace differentiation = (v[i+1]-v[i-1])/(2*dt)

  • 22: reflectivity = (v[i+1] - v[i])/(v[i+1] + v[i]) (first row set to TEST)

  • 23: modulo 2 pi = v[i] in [0, 2*PI]

  • 24: inverse = 1. / v[i]

  • 25: remove average value = v[i] - average(v[i])

radix

Radix of the name given to the variables storing the results in the target Db.

modify.target

Decides whether or not the newly created variables will have their locator defined or not. For more information, see db.locmod.

Value

The db-class structure with the newly transformed variables

See Also

seismic.grid.define seismic.convolve seismic.convert


[Package RGeostats version 11.1.1 Index]