Programmer Guide/Command Reference/EVAL/vvset

Create a copy of the vector x and replace elements.

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Usage 1

vvset(x , y {, o {, d, n}}})

x

source vector

y

replace value (scalar)

o

starting index, 0 <= o < nrow(x) (default=0)

d

index increment (default=1)

n

number of values to replace (default=nrow(x))

Result 1

The result r is copy of the vector x. All elements r[o+i*d] (with: i = 0..n-1) are replaced by the value y.

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Usage 2

vvset(x , y {, o {, d}})

x

source vector

y

replace vector

o

starting index, 0 <= o < nrow(x) (default=0)

d

index increment (default=1)

Result 2

The result r is copy of the vector x. All elements r[o+i*d] (with: i = 0..nrow(y)-1) are replaced by the value y[i].

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The function fails if an index value is out of bounds.

See also

vv, vvget, vvcat, vmcol, vmrow, vsubn, vsubc

Example:

#a := eval fill(10,0,1)
#b := eval vvset($#a, -1, 1, 2, 5) 
// -> #b = { 0 , -1 , 2 , -1 , 4 , -1 , 6 , -1 , 8 , -1 }
#c := eval vvset($#b, fill(4, 9, -3), 6, 1)
// -> #c = { 0 , -1 , 2 , -1 , 4 , -1 , 9 , 6 , 3 , 0 }
// reverse vector indeces
#arev := eval vvset($#a, $#a, $#a[]-1, -1)
// -> #arev = { 9 , 8 , 7 , 6 , 5 , 4 , 3 , 2 , 1 , 0 }

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