how to control the grid size and scale?

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taetae 2024-8-5，2:54

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回答： Rahul Chowdhury 2024-8-5，5:57

I had a grid size of 200 * 200, but I wanted to increase the resolution, so I changed it to 400 * 400. Of course, 1 grid square means 1m.

However, when I increased the size to 400, I found out that there were some structural problems in subsequent calculations.

So I want to maintain the grid size at 200 * 200, but adjust the scale so that one square means 0.5m,

and there are no problems in subsequent calculations.

Below is the current code.

originalnewGridSize = 200;
newGridSize = 400;
[x, y] = meshgrid(linspace(1, originalnewGridSize,  newGridSize), linspace(1, originalnewGridSize, newGridSize));

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Matt J 2024-8-5，2:58

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Answer 1

Rahul Chowdhury 2024-8-5，5:57

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I don't fully understand what your question is, but I can provide some ideas for you:

The first step would be to understand how the linspace command works. Quickly stated, linspace(x1, x2, n) returns a vector that starts at x1 and ends at x2 with n number of points. You can find the spacing between the points with the formula (x2-x1)/(n-1). Assuming you want to start at 1, end at 200 and have a spacing of 0.5, it should look like this:

linspace(1, 200, 399)

Another thing you could try is looking at the scaledMesh documentation to see if it's applicable for you.