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Scheme -- Sqrt not working

 
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Scheme -- Sqrt not working
shiningmer
post 10 May, 2008 - 06:41 AM
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Hey!

I'm having a little problem with a program I'm trying to write in Dr Scheme
I wrote
(define (vectornorm t n s)
(sqrt (+ (expt t 2) (expt n 2) (expt s 2)) 1/2))

But it gives error in the square root part. Can anyone help me?
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fluxion
post 17 May, 2008 - 06:20 PM
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im sure you've already figured this out by now, really simple mistake. but just in case: sqrt takes 1 argument. seems to me that you meant to do (expt value1 1/2) to do the sqrt for you.

the fix is obvious, but im gonna post this to see if the forum does syntax highlighting for scheme tongue.gif

scheme
(define (vectornorm t n s)
  (sqrt (+ (expt t 2) (expt n 2) (expt s 2)))


also, i dont know if you had completed the function yet, but your code seems to produce the magnitude rather than a normalized vector

This post has been edited by fluxion: 17 May, 2008 - 06:21 PM
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shiningmer
post 18 May, 2008 - 02:09 AM
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QUOTE(fluxion @ 17 May, 2008 - 06:20 PM) *

im sure you've already figured this out by now, really simple mistake. but just in case: sqrt takes 1 argument. seems to me that you meant to do (expt value1 1/2) to do the sqrt for you.

the fix is obvious, but im gonna post this to see if the forum does syntax highlighting for scheme tongue.gif

scheme
(define (vectornorm t n s)
  (sqrt (+ (expt t 2) (expt n 2) (expt s 2)))


also, i dont know if you had completed the function yet, but your code seems to produce the magnitude rather than a normalized vector


you're right. when i looked at it again i found my mistake immediately, but thanks anyway! biggrin.gif
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