MATLAB Central Newsreader - get a 1d vector from a multidimensional array

get a 1d vector from a multidimensional array

David Doria — Sun, 09 Sep 2007 20:35:19 -0400

i have an array that i index with 3 numbers, ie:

Normalized_Moment_Values(1, 1, 1) returns a double

However, I want all the things that correspond to (1,1,x),
so i usually do

Normalized_Moment_Values(1, 1, :)

however, this returns:

ans(:,:,1) =

    1.0693

ans(:,:,2) =

    1.4594

ans(:,:,3) =

   -0.5926

ans(:,:,4) =

    0.9791

and it wont put that into a 1d array, namely [1.06 1.4 -.59 .97]

how would i do this?

Thanks

David

Re: get a 1d vector from a multidimensional array

dpb — Sun, 09 Sep 2007 20:43:32 -0400

David Doria wrote:
> i have an array that i index with 3 numbers, ie:
>
> Normalized_Moment_Values(1, 1, 1) returns a double
>
> However, I want all the things that correspond to (1,1,x),
> so i usually do
>
> Normalized_Moment_Values(1, 1, :)
>
> however, this returns:
>
> ans(:,:,1) =
>
> 1.0693
>
>
> ans(:,:,2) =
>
> 1.4594
>
>
> ans(:,:,3) =
>
> -0.5926
>
>
> ans(:,:,4) =
>
> 0.9791
>
>
> and it wont put that into a 1d array, namely [1.06 1.4 -.59 .97]
>
> how would i do this?
>

Does

» x=rand(3)
x =
     0.9501 0.4860 0.4565
     0.2311 0.8913 0.0185
     0.6068 0.7621 0.8214
» y=x(:,1)
y =
     0.9501
     0.2311
     0.6068
» z = y'
z =
     0.9501 0.2311 0.6068
»

give you any ideas???

--

Re: get a 1d vector from a multidimensional array

David Doria — Sun, 09 Sep 2007 20:56:14 -0400

ummm no not really, that is how it usually works, but this
is not giving me a 1d thing back , it is giving me a 3d
thing, thats what i'm trying to avoid.

David

dpb <none@non.net> wrote in message <fc1m29$upv$1@aioe.org>...
> David Doria wrote:
> > i have an array that i index with 3 numbers, ie:
> >
> > Normalized_Moment_Values(1, 1, 1) returns a double
> >
> > However, I want all the things that correspond to (1,1,x),
> > so i usually do
> >
> > Normalized_Moment_Values(1, 1, :)
> >
> > however, this returns:
> >
> > ans(:,:,1) =
> >
> > 1.0693
> >
> >
> > ans(:,:,2) =
> >
> > 1.4594
> >
> >
> > ans(:,:,3) =
> >
> > -0.5926
> >
> >
> > ans(:,:,4) =
> >
> > 0.9791
> >
> >
> > and it wont put that into a 1d array, namely [1.06 1.4
-.59 .97]
> >
> > how would i do this?
> >
>
> Does
>
> » x=rand(3)
> x =
> 0.9501 0.4860 0.4565
> 0.2311 0.8913 0.0185
> 0.6068 0.7621 0.8214
> » y=x(:,1)
> y =
> 0.9501
> 0.2311
> 0.6068
> » z = y'
> z =
> 0.9501 0.2311 0.6068
> »
>
> give you any ideas???
>
> --

Re: get a 1d vector from a multidimensional array

us — Sun, 09 Sep 2007 22:15:15 -0400

David Doria:
<SNIP should squeeze his/her children...

one of the solutions

v=rand(2,3,3)
vs=squeeze(v(1,1,:))

us