Contain a pdf (probability distribution function) of selected variables as a formatted table (essentially a .tab file). A variety of statistics are computed, including the mean and variance of the distribution, the average and standard deviation, and the skewness and kurtosis of the distribution.
A new sequentially numbered
file is created whenever the integration time exceeds an integer multiple of
<output>/dt. At the end of execution, the lesser of
sequentially numbered files will be created. Also writes a
history-type file with name
prb_stat.id, where id is the string identifier for this output, with each row in the file
containing statistics of each .pdf output.
This is a specialized format that is useful only for some problems, where the statistics of fluctuations in some variable is important (for example, 3D turbulence).
An example of an
<output> block which creates a pdf of the density is given below.
<output2> out_fmt = pdf # Binary data dump out = d # density id = d # string identifier dt = 1.0 # time increment between outputs
Created by the function output_pdf.c; this function should be studied carefully to understand more about this format and what information it contains.