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## Re: [xsl] How to multiply 2 sequences ?

2007-11-07 09:18:25
```If that is indeed the requirement (and I wasn't able to work it out from the
posting) then it can be done in XPath 2.0 (without any help from FXSL) as

sum(for \$i in 1 to count(\$x) return \$x[\$i] * \$y[\$i])
```
```
Probably I am a little bit biased  :-), but comparing

sum(f:zipWith(f:mult(), \$vect1, \$vect2))

to

sum(for \$i in 1 to count(\$x) return \$x[\$i] * \$y[\$i])

the former seems slightly more readable/elegant.

--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play

On Nov 7, 2007 6:45 AM, Michael Kay <mike(_at_)saxonica(_dot_)com> wrote:
```
```
It seems that you are trying to obtain the scalar product of
two vectors:

X = {x1, x2, ... , xn}

Y = {y1, y2, ... , yn}

X.Y = x1.y1 + x2.y2 + ... + xn.yn

```
```
If that is indeed the requirement (and I wasn't able to work it out from the
posting) then it can be done in XPath 2.0 (without any help from FXSL) as

sum(for \$i in 1 to count(\$x) return \$x[\$i] * \$y[\$i])

Michael Kay
http://www.saxonica.com/

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 Current Thread [xsl] How to multiply 2 sequences ?, TEICHERT, Peter Re: [xsl] How to multiply 2 sequences ?, Andrew Welch Re: [xsl] How to multiply 2 sequences ?, Dimitre Novatchev RE: [xsl] How to multiply 2 sequences ?, Michael Kay Re: [xsl] How to multiply 2 sequences ?, Andrew Welch Re: [xsl] How to multiply 2 sequences ?, Dimitre Novatchev <=