How to insert grid lines specific position ?

Asked by voxey on 20 Aug 2019

Latest activity Commented on by Adam Danz on 22 Aug 2019

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How to insert grid lines specific position ? check this attached Imafe? How to insert grid line inside red line box on image?

2 Comments

darova on 20 Aug 2019

You can use plot

plot([800 1000] ,[600 250],'--g')

Or you want insert line into image?

Adam Danz on 20 Aug 2019

@darova , that plots a diagonal line.

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R2017b

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Answer by Adam Danz on 20 Aug 2019

Accepted Answer

Here's a demo

% Define bound
%bound(1) is the x value of the bottom, left corner of the frame
%bound(2) is the y value for the same corner
%bound(3) is the width of the frame
%bound(4) is the height of the frame
bound = [.2 .1 .5 .7]; 
% Define grid 
x = .3:.1:.6; 
y = .2:.1:.7; 
% Plot
cla()
xlim([0,1])
ylim([0,1])
hold on
rectangle('position', bound, 'EdgeColor','r')
% Plot vertical lines
vh = plot([x(:),x(:)],[bound(2),sum(bound([2,4]))], 'Color', [.6,.6,.6]); 
% Plot horizontal lines
hh = plot([bound(1),sum(bound([1,3]))],[y(:),y(:)], 'Color', [.6,.6,.6])

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Adam Danz on 21 Aug 2019

In my answer, these two lines define the placement of the grid line.

% Define grid 
x = .3:.1:.6; 
y = .2:.1:.7; 

Assuming the image is placed in an axis where the bottom left corner of the axis is (0,0) and the top right corner is (7,9) (rough estimate from your drawing), then you can define the grid lines like this:

interval = 1; %distance between grid lines. 
x = linspace(0,7,interval); 
y = linspace(0,9,interval); 

Give it a try. If you get stuck, share an image (or code) from the actual plot you're working with instead of a drawing.

voxey on 22 Aug 2019

its not working? can you share sample result with this code?

Adam Danz on 22 Aug 2019

My answer contains a fully functional sample with this code.

What's not working? What problems are you having? As I mentioned, if you get stuck, share the relevant sections of code (only the relvant sections that plot the grid). And carefully explain what's not working.

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Release

R2017b

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