How to plot an empty 2-D cartesian grid on its own ?

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inspiration
inspiration 2019-1-17
编辑： Stephen23 2019-1-17
Hello, I would like to plot a 2-D grid by itself as one figure with x ranging from 200-455 and y ranging from 50-305. Could someone please help.
PS: I only need to plot the grid, not any functions.

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回答（2 个）

Stephen23
Stephen23 2019-1-17
编辑：Stephen23 2019-1-17
>> axes()
>> xlim([200,455])
>> ylim([50,305])
>> grid on
>> grid minor
Or alternatively in one axes call:
axes('XLim',[200,455], 'YLim',[50,305], 'XGrid','on', 'YGrid','on', 'XMinorGrid','on', 'YMinorGrid','on')
Gives:
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Steven Lord
Steven Lord 2019-1-17
Do you have a picture (not from MATLAB but from a textbook, webpage, or hand-drawn) that you can link to or can attach to a comment to show us exactly what you want? It's not clear to me what requirement you have that Stephen's suggestion fails to satisfy.
Stephen23
Stephen23 2019-1-17
编辑：Stephen23 2019-1-17
"i actually want to plot a 2d grid on the cartesian coordinate system and the grid should be in the specified range."
And that is exactly what my answer and my comment have shown you:
  • my answer shows a grid with a step of ten, whereas
  • my previous comment shows a grid with a step of one.
They are both exactly over the range that you requested. If you really want to plot a grid yourself (rather than sensibly using the inbuilt grid capabilities) then you can do this quite easily using meshgrid, ndgrid, and line:
>> [X,Y] = meshgrid(200:455,50:305);
>> line(X,Y)
>> [X,Y] = ndgrid(200:455,50:305);
>> line(X,Y)
but I suspect that you will be quite disapppointed with that densely populated graphic. You could mess around with ismember and colon to try and get the grid lines where you want them, but there is little point as grid does it already. In any case, rather than making us guess what you want, please can you please show an image of exactly what you expect.

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madhan ravi
madhan ravi 2019-1-17
Perhaps?
[X,Y]=meshgrid(200:10:455,50:5:305);
mesh(X,Y)
view(2)
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inspiration
inspiration 2019-1-17
this gives me a grid with origin(0,0) whereas i need the grid to be in the specified range of x and y. is there a way to do that?

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