# Discretise a domain into a grid of uniform volume size

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daniel adams le 9 Nov 2021
Modifié(e) : Sargondjani le 10 Nov 2021
Given a domain say in how do I split/discretise the domain into a grid of uniform volume/ fixed number of grid points?
For example given how can I discretise this domain into a grid points? For some given . The linspace function has not been helpful for me.
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Sargondjani le 9 Nov 2021
x1 = linspace(0,1,M);
x2 = linspace(0,1,M);
[X1,X2] = ndgrid(x1,x2);
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daniel adams le 10 Nov 2021
Because the grid points arnt exactly the center of the volume bins ( e.g the end points )
Sargondjani le 10 Nov 2021
Modifié(e) : Sargondjani le 10 Nov 2021
Ok, so with linspace and ndgrid you get rectangles with equal area. So you only need to find the middle points of each segment? This would be the mean in each dimension.
dx1 = x1(2) - x1(1);%linspace results in equal distances between gridpoints
x1_mid = x1(1:end-1)+dx1;
And the same for x2. You now have a vector x1_mid and x2_mid which are the midpoints of the rectangular areas.

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