fft : Performs a discrete Fourier transform. fileid : Controls the file id display found on most SAC plots. filenumber : Controls the file number display found on most SAC plots. filterdesign : Produces a graphic display of a filter’s digital vs. analog characteristics fir : Applies a finite-impulse-response filter. floor : Puts a minimum value on logarithmically scaled data. funcgen : Generates a function and stores it in memory. getbb : Gets (prints) values of blackboard variables. grayscale : Produces grayscale images of data in memory. grid : Controls the plotting of grid lines in plots. gtext : Controls the quality and font of text used in plots. hanning : Applies a "hanning" window to each data file. help : Displays information about SAC commands and features on the screen. highpass : Applies an IIR highpass filter. hilbert : Applies a Hilbert transform. history : prints a list of the recently issued SAC commands ifft : Performs an inverse discrete Fourier transform. image : Produces color sampled image plots of data in memory. inicm : Reinitializes all of SAC’s common blocks. installmacro : Installs macro files in the global SAC macro directory. int : Performs integration using the trapezoidal or rectangular rule. interpolate : Interpolates evenly or unevenly spaced data to a new sampling rate. keepam : Keep amplitude component of spectral files (of either the AMPH or RLIMformat) in SAC memory. khronhite : Applies a Khronhite filter to the data. line : Controls the linestyle selection in plots. linefit : Computes the best straight line fit to the data in memory and writesthe results to header blackboard variables. linlin : Turns on linear scaling for the x and y axes. 113
linlog : Turns on linear scaling for x axis and logarithmic for y axis. listhdr : Lists the values of selected header fields. load : Load an external command. loadctable : Allows the user to select a new color table for use in image plots. log : Takes the natural logarithm of each data point. log10 : Takes the base 10 logarithm of each data point. loglab : Controls labels on logarithmically scaled axes. loglin : Turns on logarithmic scaling for x axis and linear for y axis. loglog : Turns on logarithmic scaling for the x and y axes. lowpass : Applies an IIR lowpass filter. macro : Executes a SAC macro file. map : Generate a GMT (Generic Mapping Tools) map which can include station/eventsymbols to- pography and station names using all the files in SAC memory markptp : Measures and marks the maximum peak to peak amplitude of each signal withinthe mea- surement time window. marktimes : Marks files with travel times from a velocity set. markvalue : Searches for and marks values in a data file. mat : Copy SAC workspace into Matlab and either execute a user-specifiedm-file or else get a Matlab prompt for interactive manipulation.
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- Spring '19
- mario huerta
- Test, Filename extension, Computer file, File format