newLISP® v.10.4.2 Stable Release rev 2012-5-2

This stable maintenance release fixes minor bugs and adds new functions in the math and statistics area.

Additions and changes

• A new set function union works like (unique (append ... )).
• Two new predicates even? and odd? test the parity of integers.
• The new prob-t function returns the one-tailed probablitiy of a Student's t statistic to be equal or greater than the observed value.
• The new prob-f function returns the probablitiy of F statistic to be equal or greater than the observed value.
• The new crit-t function calculates the critical value of Student's t for a given one-tailed probability.
• The new crit-f function calculates the critical value of F for a given probability level.
• The prob-z and crit-z functions now handle probabilities less than 0.5 for negative Z-values.
• The new corr function calculates a Pearson product-moment correlation coefficient between two variables.
• The new stats function calculates some basic statistics for a data vector.
• The new t-test function performs a Sudent's t-test for dependent and independent date samples.
• An additional true flag in the char function can turn on 8-bit byte indexing and translation instead of multibyte UTF-8 indexing and translation in UTF-8 enabed versions of newLISP.
• A true flag in the file? forces the return value to the name string of the file, if it exists.
• Versions compiled for the new extended FFI now show "libffi" in the banner.
• Better mean-value adherence of the normal function.
• In the extended ffi the char* type will now only accept strings as arguments. For string or buffer integer addresses void* must be used.
• import now can load a library without importing a function. This is necessary on Mac OSX, Linux and other Unix when external functions are referenced from an imported function and the library is not loaded automatically.

Modules

• newlispdoc now outputs a UTF-8 meta tag in the HTML header.
• A new module gsl.lsp imports SV, QR and Cholesky decomposition and solver functions from the GNU Scientific Library GSL. Both SV and QR can handle rectangular non-square matrices for decomposition of A and solving Ax = b for x.
• Updated plot.lsp now also has a plot:XY command and has been added to the standard modules in the source and binary distributions.

Bug fixes

• The day-of-year value in date-list now starts with 1 instead of 0. The previous version made the same change for the now function.
• The command-event function now trims trailing line-feed characters in all compile and platform flavors. Previously only UNIX and readline lib enabled versions would trim the string passed by command-event.
• A fix for pack when packing structures made with struct in 64-bit newLISP.

Compatibility with previous versions

Except for bug fixes and behavior of char* argument types in the extended import ffi interface, this version is fully compatible with previous versions.