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I have 254 * 128 integers and I need to scale down to 45 * 22,5 .
Could you please help me if I could perform with MATLAB.
Thanks
Baskar
You cannot have non-integer sized matrices. 22,5 is not a valid dimension of a matrix.
If you are talking about images you can resize the matrix in Matlab using imresize.
.
A = rand(254, 128);
A = imresize(A, [45, 23]);
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My problem is to convert my 294912x39 2d matrix into a 3D matrix 128X128X18
Using the reshape function in matlab I get errors.So, my idea is to convert it manually. My 2d matrix is 294912x39 and the 3D matrix I need is 128x128x18. Anyone could you help me?
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I wan to give x,y,z coordinates to a point, for example to P point.
The P point coordinates are: P=(0,1,1)
How can I give the values in Matlab?
I tried P=(0,1,1) and Px=0 Py=0 Pz=0 ,but I need it to an equation.
one variable can store n-dimensional coordinates
P=[0 1 1];
you can also do this:
px=0;
py=1;
pz=1;
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Is it possible to convert a .PNG image to an array of numerical values (e.g. red, green, blue values) that I can work with using MATLAB? If so, how can I do this?
not sure what you mean.
if you import imread('someImage.png') you get a n x m x 3matrix
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I want to use genetic algorithm in matlab. I have a matrix as a population.
how can I use a specific matrix as a population to input in ga function of Matlab?
use gaoptimset setting the 'InitialPopulation' field and pass the result to your ga as the options argument
example:
pop = {rand(n,m)} %// The {} might not be necessary.
options = gaoptimset('InitialPopulation',pop);
x = ga(....., options)
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Can anyone help me to make aperture function in Matlab? I tried by making a matrix, but it wasn't helpful.
If you have the image processing toolbox you can use fspecial:
A = fspecial('disk',10);
This will create an aperture of radius 10 pixels.
Next, you can embed this matrix in a bigger zero matrix, using padarray, for example:
A = padarray(A,[20 20]);