[Gretl-announce] gretl 2023c released

See https://gretl.sourceforge.net/ Here's the change log entry: - New commands "gridplot" and "gpbuild" for constructing composite plots - "gnuplot" command: implement new option syntax to support multiple "bands" in a single plot (but continue to support the old band syntax until further notice) - "panel" command: support the --cluster option to produce a greater variety of robust standard errors, including two- way clustering; add an option to use the Driscoll-Kraay covariance estimator; and support the --no-df-corr option - "tsls" command: if the --robust option is given, compute a robust variant of the Hausman test - "scatters" command: expose its time-series functionality under the name command-name "tsplots" - String-valued series: support returning such series from a user function, and loosen the restrictions on assignment to such series - New usage of the '*' operator to augment a string via repetition, for example: string s = "abc" * 3 - New function asort() for sorting arrays of all types - New function corresp() to determine the correspondence (if any) between two series or vectors - New function rgbmix() to do mixing of colors via their R, G and B channels - String functions strsub(), regsub(), substr(), tolower() and toupper(): generalize to support strings arrays and string- valued series as arguments, as well as individual strings - New function strvsort(): recodes a string-valued series such that the numeric codes correspond to the alphabetical order of the string values, or in line with a reordering specified by the user - Add documentation for the functions dec2bin() and bin2dec(), which were first defined in version 2022b - kdensity() function: clarify its documentation - halton() function: remove the limit of 40 on the number of sequences this function can generate - Input of numeric constants: support hexadecimal notation - $sysinfo accessor bundle: add CPU information - Fix bug dating from 2022c: broken handling of the syntax listname.series when used in a function that is called from within a loop - Fix bug: possibly incorrect results when applying a vector selection to a string variable - Fix bug: possibly incomplete results when compacting daily data to weekly - Fix bug: wrong alignment when appending dated weekly data - Fix bug: invcdf() and critical() misbehaving for the chi- square distribution with a CDF argument of 1.0 - Fix bug: pdf() giving NA for Chi-square with argument 0 - Fix bug: possible duplicate entries in GUI function package listing - Fix bug: markdown conversion not always working properly - Fix bug: "kdplot" command not respecting the --output option - Fix bug: pexpand() function not working as advertised - GUI: Add means of stacking side-by-side time series into panel series via the "Dataset structure" wizard - GUI: Add a color selection dialog under the Tools menu - GUI: use "Apply" and "OK" buttons more consistently - GUI: make more apparent the facility to sort series in the main window by clicking the headers - GUI: add a menu item to install a local function package, under the "/File/Function packages" menu - GUI: add Ctrl + mouse wheel as a means of changing text size in various windows - GUI editor and gretl_edit: add Ctrl-L keystroke for going to a specifed line, improve the search/replace dialog and fix a problem with automatic indentation - Windows and macOS packages: add a dark GTK theme - R interaction via embeddedR: update mechanism for determining R_HOME -- Allin Cottrell Professor Emeritus Wake Forest University