MATLAB Central Newsreader - Data analysis

Data analysis

Jesper Lauridsen — Tue, 21 Jul 2009 09:52:02 -0400

I have the following data in a vector called DATA1:

0.015
0.01
0.01
0.01
0.01
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005

What I want is to replace all values that are less or equal to 0.005 with zero in the vector. I was thinking to use some kind of if statement.

if DATA_1<=0.005
...........
else
...........
end

Re: Data analysis

us — Tue, 21 Jul 2009 10:01:04 -0400

"Jesper Lauridsen" <jesperholst_5@hotmail.com> wrote in message <h44342$4iu$1@fred.mathworks.com>...
> I have the following data in a vector called DATA1:
>
> 0.015
> 0.01
> 0.01
> 0.01
> 0.01
> 0.005
> 0.005
> 0.005
> 0.005
> 0.005
> 0.005
> 0.005
> 0.005
> 0.005
>
> What I want is to replace all values that are less or equal to 0.005 with zero in the vector. I was thinking to use some kind of if statement.
>
> if DATA_1<=0.005
> ...........
> else
> ...........
> end

one of the solutions

data1(data1<=.005)=0;

us

Re: Data analysis

Shanmugam Kannappan — Tue, 21 Jul 2009 10:03:02 -0400

Re: Data analysis

Geant Bepi — Tue, 21 Jul 2009 10:11:02 -0400

Re: Data analysis

david.correa@gmail.com — Tue, 21 Jul 2009 17:11:01 -0400

On Jul 21, 5:11 am, "Geant Bepi"
<timothyschru_useonlywhatsbeforeundersc...@yahoo.co.uk> wrote:
> "Jesper Lauridsen" <jesperhols...@hotmail.com> wrote in message <h44342$4i...@fred.mathworks.com>...
> > I have the following data in a vector called DATA1:
>
> > 0.015
> > 0.01
> > 0.01
> > 0.01
> > 0.01
> > 0.005
> > 0.005
> > 0.005
> > 0.005
> > 0.005
> > 0.005
> > 0.005
> > 0.005
> > 0.005
>
> > What I want is to replace all values that are less or equal to 0.005 with zero in the vector. I was thinking to use some kind of if statement.
>
> > if DATA_1<=0.005
> > ...........
> > else
> > ...........
> > end
>
> there can be several methods to do this depending on how you are going to use the filtered data.
> try using logical indexing;
> e.g;
> data = DATA_1(:,1)
> zee = (data <= 0.005)
>
> then you can set 'zee' to zero when performing a calculation..- Hide quoted text -
>
> - Show quoted text -

Hi,

Try this,

AA=[0.015 0.01 0.01 0.01 0.01 0.005 0.005 0.005 0.005 0.005 0.005
0.005 0.005 0.005]

ind=find(AA<=0.005)

AA(ind)=0

David C.

Re: Data analysis

us — Tue, 21 Jul 2009 17:25:19 -0400

"david.correa@gmail.com"
> Try this,
> AA=[0.015 0.01 0.01 0.01 0.01 0.005 0.005 0.005 0.005 0.005 0.005
> 0.005 0.005 0.005]
> ind=find(AA<=0.005)
> AA(ind)=0

no, unfortunately not as good as other solutions already proposed in this thread...

us

Re: Data analysis

aasim Azooz — Tue, 21 Jul 2009 18:43:05 -0400