Hi !
I have a 100 X 181 matrix and i want to count the
number of zeros in each column of the matrix. i.e I
want to generate a 1 X 181 matrix where each column
contains the number of 0's in the 100 X 181 matrix.
What is the easiest way of doing the above task?

Shailesh

you can use the 'find' function ... 
   
  !!!!pseudo-code
   
  a(1,n) = length(find(:,n ==0));
  where 'n' goes from 1:181 .. also there might be a way to avoid the 'for' loop. I have not
checked though if find will work on individual columns .. but I m pretty sure it will

Shailesh Khanolkar <s...@yahoo.com> wrote:
  Hi !
I have a 100 X 181 matrix and i want to count the
number of zeros in each column of the matrix. i.e I
want to generate a 1 X 181 matrix where each column
contains the number of 0's in the 100 X 181 matrix.
What is the easiest way of doing the above task?

Shailesh

Shailesh,
   Try X=sum(Your_matrix == 0). This should give you a row vector having 
number of zeros in each column.

Sindy
On Wed, 12 Apr 2006, Shailesh Khanolkar wrote:

> Hi !
> I have a 100 X 181 matrix and i want to count the
> number of zeros in each column of the matrix. i.e I
> want to generate a 1 X 181 matrix where each column
> contains the number of 0's in the 100 X 181 matrix.
> What is the easiest way of doing the above task?
>
> Shailesh
>

You can use  
zero_vec = sum((x == 0));
to get your result in 1x181 format. This avoids the
for loop.
Amit

--- Amit Pathania <a...@yahoo.com> wrote:

> you can use the 'find' function ... 
>    
>   !!!!pseudo-code
>    
>   a(1,n) = length(find(:,n ==0));
>   where 'n' goes from 1:181 .. also there might be a
> way to avoid the 'for' loop. I have not checked
> though if find will work on individual columns ..
> but I m pretty sure it will
> 
> Shailesh Khanolkar <s...@yahoo.com> wrote:
>   Hi !
> I have a 100 X 181 matrix and i want to count the
> number of zeros in each column of the matrix. i.e I
> want to generate a 1 X 181 matrix where each column
> contains the number of 0's in the 100 X 181 matrix.
> What is the easiest way of doing the above task?
> 
> Shailesh
__________________________________________________

Hello group,
   
  I want to try connecting the C6713 board to SIMULINK. I have all the necessary blocksets and
I successfully tried filtering a real-time input through the board and with SIMULINK. Now I
request if any one has a simple       
  pre-made project that uses SIMULINK and C6713 please send it to me to: a...@hartford.edu so I
can download and try it. The project could be in any subject (dsp-related). I would really
appreciate it.
   
  Thank you,
  Haidar