MATLAB Central Newsreader - cell array size

cell array size

Hemin — Mon, 11 Aug 2008 02:44:02 -0400

I have cell array like that , for example multiple rows 6
rows with one column:
{[1,2]
[1,2,3]
[1,2,3,4]
[1,2,3,4,5]
[1,2,3,4,5,6]}

so how I can make an array that calculate size of each row.
for example the second row is 3, third row is 4 and 4th row
is 5 elements.
does any function that can make the length or the size of
each row of that cell array?

Re: cell array size

Dina — Mon, 11 Aug 2008 02:53:02 -0400

"Hemin " <hemin.essa@ymail.com> wrote in message
<g7o91i$add$1@fred.mathworks.com>...
> I have cell array like that , for example multiple rows 6
> rows with one column:
> {[1,2]
> [1,2,3]
> [1,2,3,4]
> [1,2,3,4,5]
> [1,2,3,4,5,6]}
>
> so how I can make an array that calculate size of each
row.
> for example the second row is 3, third row is 4 and 4th
row
> is 5 elements.
> does any function that can make the length or the size of
> each row of that cell array?

u can use a for loop from 1:n and with every loop use the
size function .. size(x);

Re: cell array size

Matt Fig — Mon, 11 Aug 2008 03:32:02 -0400

A = {[1,2]
[1,2,3]
[1,2,3,4]
[1,2,3,4,5]
[1,2,3,4,5,6]}

cellfun(@length,A)

Re: cell array size

Hemin — Mon, 11 Aug 2008 03:32:03 -0400

"Dina " <corsair_dee@hotmail.com> wrote in message
<g7o9ie$dnh$1@fred.mathworks.com>...
> "Hemin " <hemin.essa@ymail.com> wrote in message
> <g7o91i$add$1@fred.mathworks.com>...
> > I have cell array like that , for example multiple rows
6
> > rows with one column:
> > {[1,2]
> > [1,2,3]
> > [1,2,3,4]
> > [1,2,3,4,5]
> > [1,2,3,4,5,6]}
> >
> > so how I can make an array that calculate size of each
> row.
> > for example the second row is 3, third row is 4 and 4th
> row
> > is 5 elements.
> > does any function that can make the length or the size
of
> > each row of that cell array?
>
> u can use a for loop from 1:n and with every loop use the
> size function .. size(x);

i have tried with the function ,but it doesnt shows that to
me.
if u c my code

load_matrix=[]; % creating a load matrix which is
summention of paths on each flow
n=size(route_path);
for i=1:n

   El=route_path(i)
   m=size(El);

     for j=1:m-1
        load_matrix =[load_matrix traffic_m(El(j),El
(j+1))];
     end

end

Re: cell array size

Matt Fig — Mon, 11 Aug 2008 03:40:04 -0400

A = {[1,2]
[1,2,3]
[1,2,3,4]
[1,2,3,4,5]
[1,2,3,4,5,6]}

You COULD do this in a loop:

lngth = zeros(length(A),1); % Preallocate
for kk = 1:length(A)
lngth(kk) = length(A{kk});
end

Or you could just use:

cellfun(@length,A)

Re: cell array size

Donn Shull — Mon, 18 Aug 2008 14:16:02 -0400

"Hemin " <hemin.essa@ymail.com> wrote in message
<g7o91i$add$1@fred.mathworks.com>...
> I have cell array like that , for example multiple rows 6
> rows with one column:
> {[1,2]
> [1,2,3]
> [1,2,3,4]
> [1,2,3,4,5]
> [1,2,3,4,5,6]}
>
> so how I can make an array that calculate size of each
row.
> for example the second row is 3, third row is 4 and 4th
row
> is 5 elements.
> does any function that can make the length or the size of
> each row of that cell array?

use cellfun:

a = {[1,2]
[1,2,3]
[1,2,3,4]
[1,2,3,4,5]
[1,2,3,4,5,6]};

b = cellfun('length', a);

Donn

Re: cell array size

Donn Shull — Mon, 18 Aug 2008 21:42:01 -0400

"Hemin " <hemin.essa@ymail.com> wrote in message
<g7o91i$add$1@fred.mathworks.com>...
> I have cell array like that , for example multiple rows 6
> rows with one column:
> {[1,2]
> [1,2,3]
> [1,2,3,4]
> [1,2,3,4,5]
> [1,2,3,4,5,6]}
>
> so how I can make an array that calculate size of each
row.
> for example the second row is 3, third row is 4 and 4th
row
> is 5 elements.
> does any function that can make the length or the size of
> each row of that cell array?

use cellfun

>> a = {[1,2]
[1,2,3]
[1,2,3,4]
[1,2,3,4,5]
[1,2,3,4,5,6]}

a =

    [1x2 double]
    [1x3 double]
    [1x4 double]
    [1x5 double]
    [1x6 double]

>> b = cellfun('length', a)

b =

     2
     3
     4
     5
     6