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Topic: access matrix
Replies: 8   Last Post: Feb 6, 2013 8:36 AM

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amira ali

Posts: 160
Registered: 5/15/11
Re: access matrix
Posted: Feb 5, 2013 12:13 PM
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"Jos (10584)" wrote in message <keqi7l$934$1@newscl01ah.mathworks.com>...
> "amira ali" wrote in message <keohlb$51a$1@newscl01ah.mathworks.com>...
> > need help urgently
> >
> > i have location of interest points in matrix A(2*13 ) where 2 is x,y of point and 13 is total number of points for example:
> > x y
> > 72.6781959551728 46.7543453323974
> > 71.9155271184922 100.930596158669
> >
> > and i have another matrix called flow (120*160) this matrix contain velocity of every pixel (v in x direction) and (v in y direction). all i need it how can i get the velocity of 13 interest points from this matrix flow so finally i must have
> > x y v(x) v(y)
> > 72. 46.7543 0.087396 -0.135287

>
> Using x and y as indexes in a matrix requires them to be integers ...
>
> Your question is also not very clear. You have "another matrix called flow" which is 2D but you index a one-dimensional vector v, using v(x) and v(y).
>
> Please rephrase ...
>
> ~ Jos


it's not one dimensional vector it will be 13 rows and 4 coulmns , i written one row as example (location of points and their velocities)



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