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# Vector multiplication

## Vector multiplication

(OP)
Hi,

As you note, I did need several equations to find the values (1.023, 1.004, 0.976, 0.955) due to the fact that the multiplication of two column vectors is a unique value.
How one can write a unique equation to get these numbers?
A work around came into mind that I use transpose of Lambda, then get diagonal of the result.
Your help would be highly appreciated.

### RE: Vector multiplication

You want to use the Vectorize operator:

============
"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill

(OP)
Hi, fel3

### RE: Vector multiplication

(OP)

#### Quote (fel3)

You want to use the Vectorize operator:
Re vectorization operator, what did this do with respect to matrix operations?

### RE: Vector multiplication

hoshangâ€¦

PTC explains the vectorize operator here: http://support.ptc.com/help/mathcad/en/index.html#...

============
"Is it the only lesson of history that mankind is unteachable?"
--Winston S. Churchill

### RE: Vector multiplication

Typically, you could do the same calculation by creating an index i := 0;rows(a.w)-1 and create an indexed calculation, i.e., result[i := 1-a.w[i/1200+300*a.w[i etc. The vectorize operator does that automatically, but the indices all have to match.

TTFN (ta ta for now)
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