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diff

  

differentiation or partial differentiation

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

diff(f)

diff(f, x)

diff(f, n)

diff(f, x, n)

diff(f, n, x)

Parameters

f

-

array or expression

x

-

variable

n

-

non-negative integer

Description

• 

The diff command computes the partial derivative of the expression a with respect to x.  The most frequent use is diff(f(x),x), which computes the derivative of the function f(x) with respect to x.

• 

If the variable of differentiation is not specified, it will be determined automatically via findsym(f,1).

• 

If the parameter n is specified, the nth order derivative is computed.

• 

If the derivative cannot be expressed the diff function call itself is returned.

• 

If f is an array, the diff(f) command computes elementwise derivatives of f.  The result, R, is formed as R[i,j] = diff(f[i,j], x, n).

Examples

withMTM:

MMatrix2,3,'fill'=xy:

diffM

yyyyyy

(1)

See Also

diff

MTM[heaviside]

MTM[int]

MTM[jacobian]

 


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