selectfun - Maple Programming Help

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selectfun

selects for a specified function

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

selectfun(e, f)

selectfun(e, f, x)

Parameters

e

-

expression

f

-

name, or list or set of names; function name(s)

x

-

(optional) name, or list or set of names; variable name(s)

Description

• 

The selectfun command searches an expression e for the function with operator name f, or, if f is a list or set of names, then selectfun searches e for any one of these functions.

• 

It returns a set consisting of all the matching subexpressions g of e such that either op(0,g)=f or member(op(0,g),f) according to whether f is a name or is a list or set of names.

• 

If the optional third argument x is specified, the selectfun command requires the subexpressions g be function(s) f of x (or function(s) f of a member of x if x is a set or list).

Examples

esinx+ⅇy+1

e:=sinx+ⅇy+1

(1)

selectfune,exp

ⅇy

(2)

selectfune,cos

(3)

selectfune,exp,y

ⅇy

(4)

selectfune,exp,x

(5)

selectfune,exp,x,y

ⅇy

(6)

selectfune,sin,cos,x

sinx

(7)

See Also

has

hasfun

hastype

select

 


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