6 X" X. o r; j6 [-Plot::plnr :2 i% |* e# D$ ?5 o$ r
tan[x] is not a machine-size real : J! M7 x; {, t1 e( ]: G3 X1 j
number at x =-0.785398 / y5 J ~; ~) D8 p1 X-Plot::plnr : ! F& |( S, ^7 {2 f6 v tan[x] is not a machine-size real 5 E3 X/ G# `8 Q/ h! {9 P. q: ` number at x =-0.721676. K6 q) B& B0 o6 O' c0 g0 d6 u
-Plot::plnr :- ^+ x" P2 r, a" U0 H
tan[x] is not a machine-size real 0 W% t9 k" e. u' x number at x =-0.652181; u% ^9 p: u( X7 g
-General::stop : * A/ Q2 t, V3 E Further output of Plot::plnr will 5 ~+ L$ N+ F2 x" ^* n. {) s' X be suppressed during 0 }- U8 X4 J, U2 x4 {1 E- T7 C2 e this calculation.6 @7 Q4 W. Z% f
然后出现坐标系,什么都没有,有没有人能解释一下,或告诉我该怎么画% i% _. l6 X& x& W7 w
因为tan[x]这样的函数肯定有无穷大的值,如果这么说的话是不是mathematics画不了这类函数?