Need help to interpret unusual Maxima notation for a derivative i.e. (d^{y+1}/dx^{y+1}) rho



> Assigning the result to a variable, as suggested by Vishal, would allow 
> to store the result in a file using save() or stringout(), but it seems 
> that one has to copy'n'paste from the window

Hi Martin,

please RTFM - read the fine manual, which provides a solution of your 
invented problem, by using with_stdout().

Sorry for the noise,

Martin

(%i1) load (f90)$
(%i2) foo : sin (3*x + 1) - cos (7*x - 2);
(%o2)              sin(3 x + 1) - cos(7 x - 2)
(%i3) with_stdout ("foo.f90", f90 (x = 0.25, y = 0.625, 'foo = foo, 
'stop, 'end));
(%o3)                         false