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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Now i want to draw a line betwen these two points The simplest way to draw a line onto an image is to use PLOT.

If you want a different color, either change the letter to any of rgbcmykwor use RGB triplets red is [1 0 0]. Have a look at the lineseries properties for more formatting options.

MATLAB Command Line Plotting, Part 1

You can also draw multiple lines with the same command, but x1,x2,y2,y3 must be column vectors with each row representing a new line.

Where y is the "down" direction and x is the "right" direction in the image. Change the color and width as necessary to be visible. You could download and use hline and vline in conjunction with hold onusing the techniques from visiting Steve on Image Processing. Or just use his techniques. Either way it works.

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matlab draw line

How to draw a line on an image in matlab? Ask Question. Asked 9 years, 7 months ago. Active 3 years, 4 months ago. Viewed 93k times.Sign in to comment. Sign in to answer this question.

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You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. Fatma Gargouri on 3 Oct Vote 0. Commented: Sumit Nishar on 22 Oct Accepted Answer: Fangjun Jiang. I want draw a line on an image, just by giving the coordinates of the extremities. I tryed the function line Accepted Answer. Fangjun Jiang on 3 Oct Vote 4. Cancel Copy to Clipboard.

matlab draw line

Pay attention of the syntax of line. Fatma Gargouri on 4 Oct Sumit Nishar on 22 Oct More Answers 1. David Young on 3 Oct Vote 2. Perhaps your problem is that figure coordinates and array indices have different conventions. So, for example.

Positions in a figure are addressed by X,Y. Image Analyst on 3 Oct Documentation Help Center. The table shows the format for the points input for the different shapes. The values of width and height must be greater than 0. You can draw one or more lines, and one or more polylines. A polyline contains a series of connected line segments. When you require one polyline to contain less than L —1 number of segments, fill the matrix by repeating the coordinates of the last vertex.

The block produces an error message if the number of rows is less than two or not a multiple of two. If some polygons are shorter than others, repeat the ending coordinates to fill the polygon matrix.

The block produces an error message if the number of rows is less than two or is not a multiple of two. Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location. Toggle Main Navigation. Search Support Support MathWorks.

Search MathWorks. Off-Canvas Navigation Menu Toggle. Rectangle Shape PTS input Drawn Shape Single Rectangle Four-element row vector [x y width height] where x and y are the one-based coordinates of the upper-left corner of the rectangle. Select a Web Site Choose a web site to get translated content where available and see local events and offers.

Select web site. Four-element row vector [x y width height] where x and y are the one-based coordinates of the upper-left corner of the rectangle. Four-element row vector [x 1 y 1 x 2 y 2 ] where x 1 and y 1 are the coordinates of the beginning of the line. Vector of size 2 Lwhere L is the number of vertices, with format, [x 1y 1x 2y 2The polyline always contains L -1 number of segments because the first and last vertex points do not connect. The block produces an error message when the number of rows is less than two or not a multiple of two.

Row vector of size 2 Lwhere L is the number of vertices, with format, [x 1 y 1 x 2 y The block connects [x 1 y 1 ] to [x L y L ] to complete the polygon. The block produces an error if the number of rows is negative or not a multiple of two. M Polygons with the largest number of line segments in any line being L. Three-element row vector [x y radius] where x and y are coordinates for the center of the circle.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have two two-by-n arrays, representing 2d-points. These two arrays are plotted in the same figure, but in two different subplots. For every point in one of the arrays, there is a corresponding point i the other array. I want to show this correspondance by drawing a line from one of the subplots to the other subplot.

This plots a line in the coordinate system given by the axes call.

draw a line on an image

In order for this to work for me i need a way to change coordinate system between the subplots system and the new system. Anybody know how this can be done? First you have to convert axes coordinates to figure coordinates. You can use Data space to figure units conversion ds2nfu submission on FileExchange.

Edit: The code above will do data conversion for a current axes. You can also do it for particular axes:.

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A simple solution is to use the toolbar in the figure window. Just click "insert" and then "Line". Learn more. Draw line between two subplots Ask Question. Asked 9 years, 7 months ago. Active 6 years, 4 months ago. Viewed 9k times. Maybe there is different way of doing this.

If so i would love to know. PKeno PKeno 2, 5 5 gold badges 17 17 silver badges 36 36 bronze badges. Active Oldest Votes. Thank you. This helped me alot!

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Does not work for me: the lines are drawn from one subplot to the other, but they do not link the points. Moreover, when I resize the figure, the lines change their relative positions I think it's the bug in the submitted script.

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Just noticed Shai comment. It might be necessary to set proper units for the figure before applying ds2nfu. Interestingly, the code above works only if I don't set the Units property for the figure at all. If I set it even to the default one pixels the lines do not line up with the points.

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Post as a guest Name.Documentation Help Center. If X and Y are both vectors, then they must have equal length. The plot function plots Y versus X.

If X and Y are both matrices, then they must have equal size. The plot function plots columns of Y versus columns of X. If one of X or Y is a vector and the other is a matrix, then the matrix must have dimensions such that one of its dimensions equals the vector length.

If the number of matrix rows equals the vector length, then the plot function plots each matrix column versus the vector. If the number of matrix columns equals the vector length, then the function plots each matrix row versus the vector.

If the matrix is square, then the function plots each column versus the vector. If one of X or Y is a scalar and the other is either a scalar or a vector, then the plot function plots discrete points.

However, to see the points you must specify a marker symbol, for example, plot X,Y,'o'. If Y is a vector, then the x -axis scale ranges from 1 to length Y. If Y is a matrix, then the plot function plots the columns of Y versus their row number. The x -axis scale ranges from 1 to the number of rows in Y.

If Y is complex, then the plot function plots the imaginary part of Y versus the real part of Ysuch that plot Y is equivalent to plot real Y ,imag Y.

For a list of properties, see Line Properties. Use this option with any of the input argument combinations in the previous syntaxes. Name-value pair settings apply to all the lines plotted. The option ax can precede any of the input argument combinations in the previous syntaxes. Use h to modify properties of a specific chart line after it is created.Sign in to comment.

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matlab draw line

Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location.

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Trial software. You are now following this question You will see updates in your activity feed. You may receive emails, depending on your notification preferences. How to draw lines in matlab. Aditya Shau on 27 Jul Vote 1. Commented: Wilmar Lima on 11 Nov Suppose x axis values are 30,40,50 and its corresponding y-axis values areHow to draw three different line in a plot with 30, one line, 40, one line and 50, one line.

Thank you.

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Answers 1. KSSV on 27 Jul Vote 0. Cancel Copy to Clipboard. REad about plot. The plot should be like vertical lines.Sign in to comment. Sign in to answer this question. Unable to complete the action because of changes made to the page. Reload the page to see its updated state.

Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select:. Select the China site in Chinese or English for best site performance. Other MathWorks country sites are not optimized for visits from your location.

Toggle Main Navigation. Search Answers Clear Filters. Answers Support MathWorks. Search Support Clear Filters. Support Answers MathWorks. Search MathWorks. MathWorks Answers Support. Open Mobile Search. Trial software. You are now following this question You will see updates in your activity feed.

You may receive emails, depending on your notification preferences. Draw lines between points. Emi on 4 Dec Vote 1. Edited: Walter Roberson on 2 May Accepted Answer: dpb. I have a text file "coordinates. File looks like this:. I can do this by manually like:. But the actual file is quite long and I need to "automate" this process. I tried:.


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