Which is the latest version of MATLAB for GRABIT command to work. Anyone?

For those who want to grab datapoints from a log-log graph, you can apply a simple transformation. For calibration, select points that are integer decades apart, then specify the decade (ex 3x10^1 -> 1, 3x10^4 -> 4) for the calibration values.

Once the data is grabbed, just apply the following transformation: [x, y] -> [constant1*10.^x, constant2*10.^y]. For example, where one axis limits are from 3x10^1 to 3x10^4, then the constant is 3. One such transformation can be executed as the following: a1 = [3*10.^Data001(:,1) 10.^Data001(:,2)];

Not supporte by R2017a :-(

Great Functions!

Great utility! Thanks!

An extremely useful tool! Thanks!

does it work for double Y axes?

Is it possible to use it when one axis is in log scale and not linear?

Really great tool. I would suggest to build in an interpolation as a post processing option.

Great tool to extrapolate raw data from stress-strain curve images. Thanks for a great macro Jiro!

good

How to make this understand that an axis is on log scale

Effective tool. Useful with stress-strain curves

Perfect

Great tool.. Thank you

How can I use it for log log plot?

Very useful function,

this code is pretty useful to get the x and y pixels of any jpeg image (or any other types of images). However, if I have a jpeg thermal image and I need to extract the temperature data from it, i.e., the value beneath each point (xpixel,ypixel), this code is not useful.
P.S: ginput function in MATLAB does, to some extent, the same job as this code.

It's great.Thanks the author.

When I grab a point, the function draws a red dot on the image.
Is there a way to change the color of the dot from red to another color, for instance cyan, even by modifing the function? Thanks

Great tool.
How to extract the data points if the one of the axis is in logscale? For e.g. yaxis in log scale.

good

Great GUI. If you could set it for a semilogy, semilogx, or loglog instead of linear only, that would be incredible. Also, the cursor accuracy when grabbing data points be improved by making it more like the cursor when selecting the X, Y axes.

Thank U so much!

I like the interface and resolution allowed by the algorithm. However, when I tried using on a plot, it consistently is not correctly scaling my "grabbed" points to neither the min-max x or y coordinates that I input.

Thx for this file!

excellent tool!
thank you so much!

good

Error message, unable to expand "grabit.zip" into downloads. Any solutions for this issue yet ?

There is an error message when attempting to unzip the file:

"Unable to expand "grabit.zip" into "Downloads".
(Error 1 - Operation not permitted.)"

Just wanted to notify --

It seems quite useful, but on OSX 10.11.6, Version R2016a, it warns me of 2 deprecated properties which "may go away in future releases." (DrawMode and EraseMode) So it looks like it needs an update. If I can I may try to update this as it might be a good chance for learning some new things for me.
I found that it's a little tricky to set up the axes as the cursor is quite fine, but that is an advantage really. One needs to be careful and practice a bit. Also Log plots need you to choose the exponent so again a tad tricky but practice should help. Not obvious how else you could do it. And "max" really does mena the maximum value on the scale.

How we can save the image, after garbing points.
is there any way to get the selected image.

great tool!

Thank you for this!

this is a very use full application,
Thank you

It is really a amazing GUI,but there is a warning, EraserMode will not be supported.so it should be updated.

Really easy and straightforward to use. No unnecessary complications or extra features. Works great!

I use this all of the time for analyzing data from others' work. I wish there was a function to deal with log axes.

Just what the doctor ordered, worked well first time. Thank you Jiro!

Paul

It worked well and helped me a lot. Thanks!

Great software, it was a little dated so I needed to tweak it a bit to deal with log scale axis and get rid of those annoying warnings.

like

Very useful software! Very intuitive and easy to use. Exactly what I needed.

very good software, so much thanks!

Excellent. Thanks a lot.

Great work! Very useful

Very useful code. This is what I was looking for. Thanks

This has been a great utility for me over the years. However, it appears to be showing its age with the new graphics system. I am now seeing the following warnings when starting the tool:

Warning: The DrawMode property will be removed in a future release. Use the SortMethod property instead.
> In grabit (line 471)
Warning: The EraseMode property is no longer supported and will error in a future release. Use the ANIMATEDLINE function for animating lines
and points instead of EraseMode 'none'. Removing instances of EraseMode set to 'normal', 'xor', and 'background' has minimal impact.

Exactly what I needed. The only thing that was not intuitive to me was hitting [ENTER] to indicate that I was done specifying each axis.

PERFECT

Straight-forward, simple, and gave me everything I was looking for, and much more.
- Upload image file
- Choose/define X,Y axes
- Zoom/Pan to area of interest
- Click to record desired datapoints
- Plot is generated in real-time
- Data table can be saved for further processing!

Worked well for simple data point extraction from a PNG.

For those of you getting the error "unexpected matlab operator", make sure you call "addpath" and add the directory in which this .m file is stored. The main function calls other functions within the .m file.

amazing program!!!! thank you very much!!!!

Thank you so much . It was so usefull

Super! This just saved me quite a bit of work. Thank you.

excellent work a nice tool

I wonder if there is a way to automatically recognize the waves if the image has a wave of a unique color and if there is a way to do multiple files instead of clicking points one by one. Thanks!

Does make my life easier, thank you

That's great. Thank you very much!

WOW!! Absolutely beautiful, I love it, thanks!!!!

For people asking about logarithmic axis...
You can put the values for calibration of log axis as 1, 2, 3 instead of 10, 100, 1000, and then when you plot the data just take 10^(axisValues).

Best, Thanks

It is working fine. Nice work.

How does it work with log axis ?
Thank you.

Nice work Jiro. Liked it. Very useful for me.

This has been a very useful submission for me. One minor improvement that I could suggest is an option to recalibrate the x-axis and y-axis independently. I think that would be great for plots with multiple y axes.

Won't work in 2013b though

Works so well! Thank you for your contribution Jiro~

Suggestion: automatic recognize curve (if possible)

thanks Jiro, great tool. If you find the time, why don't you go and put in a way to select a continuous color (a line) for instance. This would make clicking along a closed plot unecessary. What do you think ;)

Worked perfectly for me. This is one of the best implementations of a plot digitizer I have ever used. Thanks for sharing your excellent work!

Great tool!
Does exit an updated version to deal with logarithmic axes?
Or maybe some one could give me some clue to implement it in the code... thanks

Many thanks for you, you have solved a very complex problem for me

Thanks for the great tool. I'm currently trying to adapt it a little bit for my use, and bit of help would be appreciated.

I have a bunch of images from which I plan to grab data. However, they only have y axis reference points, so I can't calibrate them properly. The x-axis is on the same scale as the y-axis, so what I want to do is force the origins of both axes to be at the same location. Then I can force the horizontal distance (on screen) between Xo and Xmax to be the same as the vertical distance between Yo and Ymax. However, I don't really understand how the locations of the calibration points are stored and used, so I'm having trouble.

It is very helpful, veru well done

very nice tool!

There are several versions of this type of GUI on the exchange, but this is by far the best one. It incorporates all of the stuff that the other guys are missing, plus the interface is very easy to use. I especially like that it can handle skewed images from really old scanned papers.

Awesome!

Nice Gui, but miss an automatic curve recognition. I'm also using reverseplot
(http://www.mathworks.co.uk/matlabcentral/fileexchange/4316-reverseplot), which has this feature, but a slightly inferior gui.

Hello,

Thanks for this nice tool.
Instead of point, can I get an area by marking a particular region in the bit map.
Regards
Ram

This a great application. I would have one request. Would it be possible to calibrate to the image size, with origin at top left max Y at bottom-left and max X at top-right. It is very basic and not as general as the current calibration procedure using 4points.
I am having issues with zoom and ginput to get the coordinate of a point in an image to change the coordinate system to that point later on in pixel and physical units. Thanks.

A very useful application.

GREAT GREAT GREAT WORK!!!!

Excellent tool - best one of these I've used so far. Log axes? No problem, just type in the exponent as the calibration values.

Suggestions:
* Ask the user if the data should be adjusted if the user recalibrates after grabbing.
* If the scan is not perfectly horizontal it would be nice to have two adjustment points for each xmin, xmax, ymin, and ymax - i.e. support for rotated coordinate transformation.

Super tool!

Need the capability to use log-axes though.

This is one of the best and most useful tool I found here: really compliments!

GREEEEAT,

Is it possible that in the preview box shows the position calibrated and the corresponding pixel?

I plan to use it to calibrate a video to follow a laser spot

This program is ingenious. It is extremely small, easy to use and yet so useful that it makes it the ultimate grab tool.

This script is a lot better than Datathief which I formerly used. It makes extracting data from figures easier and faster!

Does not work. from the first line itself it says unexpected matlab operator..
please help. i think its not identifying 3d
i am using matlab 7.1.0.246 (R14)

Does not work. from the first line itself it says unexpected matlab operator..
please help.
i am using matlab 7.1.0.246 (R14)

for the last six month i am trying to extract the data from the image file. Now i got it. this is very well work for me and all (those who are working Scientific data processing).

Thanks a lot. Good Job.

This is something I was looking for. Thank You. Tip: wouldn't it be nice to extract data point form graphs with logaritmic axes?

Just loved it. Very good interface also.

Very usefull,

Extremely useful. Thank you very much for sharing.

Excellent tool. Thanks for posting.

very useful tool. Thanks a lot.

excellence! I am waiting for the next version which can deal with logarithmic axis. Good luck!

I have uploaded an improved version. It has a better zooming feature (also zoomable during calibration) and a click-n-drag panning feature. I have not yet implemented capability to deal with LOGARITHMIC axes, but that's on my to-do list.

A very useful utility. Suggested additions and improvements are:
1) facility to deal with logarithmic as well as linear axes.
2) allow zoom function to work in calibration mode as well as in data grabbing mode so that axis limits can be defined more accurately.

Sorry, but wenn I start your code, I can see only GUI. If I browse a filename (Load Image) - only a path and image name will be shown, but I can´t see anything... Please inform me what to do, thanks

The imshow command used at line 382 ('iH = imshow(A, map)') does not work in MATLAB R14 SP2. Replacing it with 'iH = image(A);
colormap(map);' solves the problem. Other than that a very useful but of code!

A very good code. I have tried it, it works well.

good piece of code. useful for retrieving data points from images.

perfect... would suggest to improve on finding data automatically when clicked on any particular line on the image