contents.m

实现地震勘探中

%   s_fft                               - Function computes amplitude spectrum or Fourier transform of the traces of 
%   s_fill_trace_gaps_2d                - Fill gaps in seismic data (missing traces) by all NaN's.
%   s_filter                            - Function filters seismic input data
%   s_frequency_attributes              - Compute median frequency, bandwidth, and power spectrum of seismic input data
%   s_gain                              - Function computes and applies a gain function to the input data set and
%   s_gd                                - Get the description of the header with mnemonic "mnem" from seismic data set "seismic"
%   s_get_extrema                       - Determine, for each trace, the value of the requested trace extremum and 
%   s_gh                                - Function gets header with mnemonic "mnem" from seismic data set "seismic"
%   s_gu                                - Get units of measurement of the header with mnemonic "mnem" from seismic data set "seismic".
%   ds_header                            - Function manipulates header(s) of a seismic dataset
%   ds_header_int2double                 - Convert the bit pattern of integers in a header to floating point numbers 
%   ds_header_math                       - Function creates new header using the mathematical expression contained in the
%   ds_header_plot                       - Function plots values of seismic headers
%   ds_header_sort                       - Function sorts the headers of the seismic structure "seismic" and creates an index 
%   s_hilbert                           - Function computes Hilbert transform or instantaneous amplitude of seismic data
%   s_histogram                         - Function computes histogram of seismic amplitudes
%   s_history                           - Function operates on the history field of a seismic structure; displays data set history
%   s_horizon_values                    - Function determines seismic amplitude at a horizon whose time is stored 
%   s_impedance                         - Function computes impedance from reflection coefficients
%   s_iplot                             - Function plots seismic data in wiggle-trace form. 
%   s_ispectrum                         - Function computes and displays the spectra of seismic data in interactively
%   s_log2reflectivity                  - Create reflection coefficient series in time from well log in 
%   s_log2seismic                       - Function converts log curves whose mnemonics are listed in the second input argument
%   s_min_phase_inverse                 - Compute the minimum-phase_inverse of a wavelet of a data set; it is assumed
%   s_multi2one_trace                   - Function converts the traces of a data set into individual one-trace datasets.
%   s_new_time                          - Function creates new "time" scale (e.g. for time-to-depth conversion: in
%   s_nmo                               - Perform NMO correction of gathers
%   s_noise                             - Function computes zero-mean noise with the same structure as the input data set
%   s_noise_estimation_nugget           - Function computes noise on seismic traces; simplified version that uses 
%   s_normalize                         - Function normalizes seismic traces
%   s_one2multi_trace                   - Function combines the traces of a dataset vector set into one multi-trace data set.
%   s_phase_rotation                    - Function rotates the phase of each trace in the input data set.
%   s_pick_horizon_2d                   - Interactively pick a horizon on a 2-D seismic section; if more than one pick 
%   s_plot                              - "Quick-look" plot of seismic data. Color plot if there are more than 
%   s_plot_spectra_wavelet_seismic      - Plot spectra of wavelet, seismic, and synthetic
%   s_plot_wavelet_with_spectrum        - Plot wavelet and its amplitude spectrum in one figure
%   s_plot_with_header                  - Function plots one or more header values above a seismic data set in 
%   s_power_spectrum                    - Function computes power spectrum (amplitude spectrum) of seismic traces using
%   s_principal_components              - Function computes principal components of seismic traces. It can output
%   s_pw_header                         - Function manipulates header(s) of a seismic dataset or a pseudo-well dataset
%   s_ray_trace_gather                  - Function creates, for test purposes, a synthetic gather consisting of 
%   s_refl2impedance                    - Function computes impedance from reflection coefficients. Either an "old" 
%   s_reflcoeff                         - Function computes reflection coefficients from impedance
%   s_reflections2impedance             - Function computes impedance from reflection coefficients. Either an "old" 
%   s_resample                          - Function resamples seismic data to new sample interval. If the new sample
%   s_rm_trace_nulls                    - Remove NaN's at the beginning and end that are common to all traces;
%   s_rm_traces                         - Function removes traces 
%   s_rm_trend                          - Function removes means (bias), medians, trends, etc. from a seismic data set
%   s_rm_zeros                          - Function removes common zeros at the beginning and end of traces and
%   s_roots2wavelet                     - Compute wavelet from the zeros of its z-transform
%   s_scale_seismic_data_sets           - Compute scale factors to apply to "seis2" so that its amplitudes 
%   s_seismic2wavelet                   - Function computes wavelet with about the spectrum expected on the basis of the
%   s_seismic4jason                     - Function writes seismic data to ASCII file in Jason, comma-separated format.
%   s_select                            - Function extracts subset of seismic input traces. An option also allows changing the time
%   s_select_polygon                    - Select subset of a 3-D data set either inside or outside a polygonal region
%   s_shift                             - Function applies user-specified time shifts to seismic traces
%   s_shotdata                          - Offsets4Veritas50
%   s_shotgather                        - 
%   s_slice_3d                          - Plot a slices of a 3-D dataset
%   s_spectrum                          - Function computes the spectrum of seismic input data sets. Null values in any
%   s_spectrum2wavelet                  - Compute zero-phase wavelet from its amplitude spectrum; unless spectral 
%   s_stack                             - Function stacks seismic traces (sums the traces of gathers and divides 
%   s_stack_with_deviation              - Compute stack and the deviation of each input trace from the stack. 
%   s_synthetic4landmark                - Function writes one-trace synthetic to ASCII file in Landmark format.
%   s_synthetic_gather                  - Function creates a synthetic gather consisting of individual events (spikes) 
%   s_table2headers                     - Add headers to data set from a table (e.g. to add horizons, well track)
%   s_test_data_for_probe               - Create a test dataset to check the performance of a probe
%   s_test_gather                       - Function creates, for test purposes, a synthetic gather consisting of 
%   s_timeslice_3d                      - Plot a time slices of a 3-D dataset; INCOMPLETE
%   s_tools                             - Without argument, function lists all functions that process seismic data.
%   s_trace_numbers                     - Function outputs trace numbers of seismic input traces based on 
%   s_trace_smooth_2d                   - Smooth seismic data horizontally, in a frequency-dependent way, over an
%   s_volume_browser                    - Interactive display of a 3-D seismic data set (volume) via 
%   s_wavelet2roots                     - Compute the zeros of the z-transform of a wavelet; for a minimum-phase 
%   s_wavelet4hampson_russell           - Write a wavelet to an ASCII file in Hampson-Russell format
%   s_wavelet4landmark                  - Function writes wavelet to ASCII file in Landmark format.
%   s_wavelet_from_hampson_russell      - Read wavelet in Hampson-Russell format from ASCII file
%   s_wavelet_from_landmark             - Read seismic data in Jason format from file
%   s_wavelet_from_spectrum             - This function is intended to allow interactive selection of a wavelet 
%   s_wavelet_matching                  - Function computes filter that matches the first input data set to the 
%   s_wavest                            - Function extracts wavelet from seismic data using a log-derived 
%   s_wavextra                          - Function extracts wavelet from seismic data using a log-derived 
%   s_wavextra_beta                     - Function extracts wavelet from seismic data using a log-derived 
%   s_wedge_model                       - Function computes seismic traces representing a wedge model
%   s_wiener_filter                     - Function computes the filter that matches (filters that match) the first
%   s_wiener_filter_beta                - Function computes the filter that matches (filters that match) the first
%   s_window                            - Function applies window/taper to all traces of a seismic dataset.
%   s_wplot                             - Plot seismic data in wiggle-trace, variable-area form. By default, positive 
%   s_wplot_with_header                 - Function plots one or more header values above a seismic data set in 
%   s_xplot                             - Function plots seismic data in wiggle-trace form with a specific color scheme
%   s_zero_phase                        - Create the zero-phase equivalent of the input data set (usually a wavelet).
%   s_zone_attributes                   - Compute attributes such as minimum, maximum, RMS amplitude in a trace-dependent
%   same_precision                      - For seismic dataset: determines the precision of the seismic traces and
%   samples_of_shale_sand_reflections   - Compute samples of shale/sand reflection coefficients for a number of angles
%   sand_shale_layers                   - Create "ntr" packages of sands and shales
%   sand_shale_layers2                  - Create "param.ntr" pseudo-wells consisting of sands and shales; like 
%   scatterplot                         - Plot irregularly spaced 3-D data as color patches
%   show                                - Function displays numeric variables, structures, and cell arrays in a
%   show_las_header                     - Function displays/outputs the header of a LAS file
%   show_precision                      - Function checks numeric fields of specific structures (seismic, well log, 
%   show_segy_header                    - Function displays the EBCDIC header of a SEG-Y file
%   sort_header                         - Function sorts the headers of the dataset "dataset" and creates an index 
%   spectral_constraints                - Function creates a matrix which imposes a spectral constraint on on the solution 
%   split_line                          - Find the separators ".", ":" and "|" in the input string and split it into up
%   split_units_values                  - Find the first blank in the input string and split into two cells
%   stemplot                            - Plot irregularly spaced 3-D data
%   systemDefaults                      - This function establishes default values for parameters used by SeisLab
%   t_2d_binning                        - Bin samples of a two coordinate table (two columns of the table are 
%   t_check                             - Check if fields of a table structure are compatible 
%   t_column                            - Function manipulates column(s) of a table structure
%   t_convert                           - Convert a matrix into a table structure
%   t_crossplot                         - Function makes crossplot of column with mnemonic "mnem1" (x-axis) vs 
%   t_depth2time                        - Use columns "depth" and "vint" or "vp" to create a column 'twt"
%   t_effect_of_wavelet_error           - Compute the net-sand prediction results for wavelet "wavelet" when the correct
%   t_gc                                - Get column with mnemonic "mnem" from table data set "table".
%   t_log2table                         - Function converts log structure to table structure
%   t_modeldata                         - Create table with elastic layer properties for e.g. ray trace modeling
%   t_plot_2d                           - Plot columns of a table structure as curves
%   t_plot_3d                           - Plot columns of a table structure
%   t_plot_3d_beta                      - Plot columns of a table structure
%   t_pwell_reflections                 - Compute reflection coefficients between rocks with "lithoindex1" and those 
%   t_resample                          - Function creates new table by interpolating the "values" field for
%   t_samples_of_shale_sand_reflections - Compute samples of shale/sand reflection coefficients for a number of
%   t_shale_sand_tables                 - Create sample tables of detrended shale and sand properties; for test purposes
%   t_tools                             - Without argument, function lists all functions that create or modify tables.
%   t_vint2vrms                         - Use columns "twt" and "vint" or "vp" to create a column 'vrms" with the 
%   t_write_ascii_file                  - Write a table structure to an ASCII file
%   timeStamp                           - Function creates time stamp and possibly a label on a figure.
%   tokens                              - Decompose string into individual strings separated by string "sep".
%   traces2volume                       - Convert traces of a 3-D dataset into a three-dimensional matrix
%   unique_and_multiplicity             - Written by: E. R.: October 27, 2006
%   unit_substitution                   - Function substitutes standardized set of units for input units
%   units2tex                           - Function substitutes TeX-style units for input units that imply exponents or 
%   unwrap_phase                        - Unwrap phase as described in  Yanghua Wang, 2000, 
%   variability2gamma                   - Function converts variability to function gammas (for noise estimation)
%   variability2nugget                  - Function converts variability to function gammas (for noise estimation)
%   vector2str                          - Convert a numeric vector into a "sep" separated string.
%   velocity_of_traversed_layers        - Assemble a velocity-depth pairs as defined by rayinfo
%   warnid                              - Create an identifier for warnings based on the name of the calling function
%   write_las_file                      - Function creates a disk file in LAS (Log ASCII Standard)format, 
%   write_segy_file                     - Function writes seismic data to disk in SEG-Y file format ; if the start