1.4. pyopus.simulator.rawfile — Support for reading and writing SPICE OPUS raw files

SPICE OPUS raw file input/output

SPICE OPUS results are stored in raw files. Every raw file can contain multiple plots.

A plot is a group of vectors (arrays). Every plot has a title, a date, and a plot name associated with it. The vectors in a plot need not be of the same size or shape. Generally they are of the same shape and one of them is a so-called default scale.

The default scale vector is the one that goes on the x-axis of plots. All other vectors represent y-axis values corresponding to various simulation results.

Sometimes a vector in a plot has a different scale than the one given by the default scale vector. In that case the scale is also a vector in the same plot. Which vector is the (non-default) scale of a given vector is specified by a separate scales dictionary.

pyopus.simulator.rawfile.raw_read(filename, debug=0, reverse=0)[source]

Returns a list of tuples, where one tuple represents one plot obtained from the raw file with filename for name. Every tuple consists of the following members:

  1. a dictionary of vectors (arrays) with vector name for key

  2. the name of the default scale vector

  3. a dictionary specifying scales for vectors using a non-default scale. Keys are vector names while values are the names of non-default scale vectors

  4. a string with the title of the plot

  5. a string with the date of the plot

  6. a string with the name of the plot

Automatically detects the format of the file (ASCII/binary).

If reverse is True the double values are reordered in reverse byte order. This way raw files generated by the Cadence Spectre simulator can be read correctly.

Returns None if an error occurs during reading.

pyopus.simulator.rawfile.raw_write(filename, vectors, defaultScale='', scales={}, title='Untitled', date=None, plotName='unknown', binary=True, append=False, padding=True, precision=15, debug=0)[source]

Writes a plot to a file named filename. If append is true the plot is appended at the end of the file (makes it possible to store multiple plots in a single file).

If binary is True the data are stored in binary format. Otherwise the format is ASCII.

If padding is True the output is padded with zeros for arrays that are shorter than the longest array in the plot.

precision specifies the number of significant digits to store if the format is ASCII.

The vectors are specified in the vectors dictionary with vector name for key.

defaultScale is the name of the defautl scale vector.

Vectors using a non-default scale are listed in the scales dictionary. The vector name is the key while the scale name is the value.

title, date, and plotName are strings that specify the title, the date, and the name of the plot.

Returns 0 on error. A nonzero value is returned if everything is OK.