how to plot multiple graph on top of images together?

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DARSHAN KUMAR BISWAS 2022-7-4

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评论： DARSHAN KUMAR BISWAS 2022-7-5

Suppose there are multiple numbers of images and I have to plot graph over each one of them and display all of them together. How can I do it?

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DGM 2022-7-4

That's a remarkably vague description.

Are the images already in the workspace, or do they have to be generated/read?

What kind of plot? A line plot? A contour? A filled contour?

How is the plot aligned to the image?

How do you want to display them "together"? Do the plots share a similar domain and range such that you intend to display them in the same axes? Are they to go in separate axes? Do axes decorations matter, or is the goal to just create a montage?

DARSHAN KUMAR BISWAS 2022-7-4

the images need to be read.

It's a line plot.

the line separates two regions in the image.

like the image below there are multiple number of images with various length of the orange part.

I need to plot the black line on top of the image and display all the images together one after another.

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Answer 1

DGM 2022-7-4

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编辑：DGM 2022-7-4

在 MATLAB Online 中打开

This is an oversimplified example:

% a picture comes from somewhere

A = imread('peppers.png');

% some data comes from somewhere

x = linspace(0,2*pi,100);

y = sin(x);

% get data range

xrange = min(x)+[0 range(x)];

yrange = min(y)+[0 range(y)];

% display the image

hi = image(xrange,yrange,A); hold on

% display the plot

hp = plot(x,y,'c');

How exactly the plot and image need to be located/scaled with respect to each other is something you'll have to decide. If there are multiple images, read/create them and then plot them in subplots using a loop.

There are other examples of overlaying plots on images. Here is one using contourf():

https://www.mathworks.com/matlabcentral/answers/1659975-i-need-to-add-color-shapes-to-dose-distribution-images