Generate a Sequence in MATLAB

I have a 2d NxN image L. I need to convert it to a sequence of pixels L1={k1,k2,....kNxN} row wise

Answer 1

[Walter Roberson]

L1 = reshape(L.',1,[]).'

[LOKESH]

do i need to do .' at the end..

[Walter Roberson]

Now, the final .' could be left out.

[Walter Roberson]

Urrr, I mean "Yes, the final .' could be left out"

[LOKESH]

Thanks Walter.Can you brief me about that as i am unable to get its syntax that u have written

[Walter Roberson]

Experiment with these steps:

L = magic(5)

t1 = L.'

t2 = t1(:)

t3 = t2.'

And see http://www.mathworks.com/help/techdoc/math/f1-85462.html#f1-85511

[LOKESH]

Thanks Sir.But with L1 = reshape(L.',1,[]),I am able to convert my 1D image to 2D.But it works only for some images,for rest it gives me errors of

"Access Out of Bounds" OR

"??? Error using ==> reshape

Product of known dimensions, 256, not divisible into total number

of elements, 21845.

Error in ==> rk4_CHEN at 198

C2 = reshape(C1.',M,[]);"

[Walter Roberson]

You are using M = 256. The only way to reshape in to a 1D row of pixels row-wise is if M = 1.

If you want to convert in to rows, then the number of rows you use, M, must be divide the number of elements in the matrix.

I notice that 21845, the number of elements in the matrix, is 257 x 85. 257 is, of course, one greater than 256. Please check your code for an off-by-one error.

Also, please be careful about whether you use M as the 2nd or 3rd parameter of the reshape(). Do you want M rows and however many columns that works out to, or do you want M columns and however many rows that works out to?

Anyhow, as your requirements have changed since your initial question, please post your new requirements.

Answer 2

[Derek O'Connor]

L1 = L(:)'

[Walter Roberson]

That would not take the sequence "row-wise"; it would take them column-wise.

[Derek O'Connor]

Sorry, I hadn't noticed the "row-wise".