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10. expressions with heads that are not symbols

已有 955 次阅读2010-1-24 10:33 |个人分类:mmtc_maple|

10. expressions with heads that are not symbols

 

f[x]

f[1][x] This function has head f[1]. You can use head like this to represent indexed functions.

(a+b)[x] You can use any expression as a head. Just remember to put it in necessary parenthese.

 

常见的例子:

1pure funtion

Function[x, x^2][a + b]

2InterpolatingFunction[data][args]

3function opreators

Derivative[1][f][x]

 

备注: 函数的head本身是expr

In[2]:= p1 = p2; p1[x, y]              Out[2]=  p2[x, y]

In[5]:= InverseFunction[ArcSin]    Out[5]=  Sin

 


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