Reported by Michael Baudin, Jan 13, 2012
For example, atanh cannot be differentiated : -->x=diffcode_der(1,2); -->atanh(x) !--error 10000 atanh: Mauvais type pour l''argument d''entrée n°1 : Matrice réelle ou complexe attendue. at line 17 of function atanh called by : atanh(x) Other functions which cannot be differentiated are acosh, asinh. More generally, many functions which are based on macros and which include type-checking cannot be differentiated. This is a direct consequence of the bug : http://bugzilla.scilab.org/show_bug.cgi?id=10111 This is not a bug directly in diffcode: this is a bug in Scilab, which is revealed by diffcode. More generally, any Scilab which uses overloading may reveal this bug.
Comment 1 by Michael Baudin, Jan 13, 2012
Other functions which fail are: cosh, sinh, tanh (although the exact derivative of these functions is provided by diffcode.)
Comment 2 by Edson Valle, Sep 14, 2012
Seems like it is a Scilab bug/issue. Is this corrected in Scilab 5.4? Are there any intention to correct this bug soon?
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