What's wrong with the "norme" function?

What's wrong with the "norme" function? - norme function gives strange error message and won't work - Messages

Go to last post

#1 Posted: 9/1/2012 11:24:16 AM

22 likes in 36 posts.

Group: User

I've tried using the "norme" function -- the function that calculates the Euclidean norm of a vector (or matrix) -- and can't get it to work. For example, when I try:

s:mat(1,2,3,4,5,5,1)
norme(s)=

It won't calculate the Euclidean norm. Instead I get this strange message:

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

Not a big deal, since you can define your own "norme" function, e.g.,

NormE(F):line(nn:length(F),sqrt(sum((el(F,k)^2),k,1,nn)),2,1)

but, if it's listed in the "function" collection, it'd be nice to have it working properly.

September 1st, 2012

#2 Posted: 9/2/2012 4:54:36 PM

Radovan Omorjan

325 likes and 1 dislikes in 2,052 posts.

Group: Moderator

That is strange...

The norme() does not work on the laptop with Win7 "error: Atempted to read or write protected memory..." - but it does works at the desktop with WinXP.

[MATH=eng]s:mat(1,2,3,4,5,5,1)[/MATH]

[MATH=eng]norme(s)=7.4162[/MATH]

[LIVE width=248 height=98]http://smath.info/live/?file=3913[/LIVE]

Regards,
Radovan

When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"

#3 Posted: 9/3/2012 3:22:08 AM

sergio

120 likes in 337 posts.

Group: User

same error with Win7 desktop.
sergio

#4 Posted: 5/17/2013 9:29:55 AM

Martin Kraska

1,332 likes in 2,240 posts.

Group: Moderator

enorm() seems to work now (with 0.96.4884). The workaround from the customFunctions plugin is switched off here, as the dynamic assistant (invoked by F12) shows.