File Exchange

image thumbnail

Graph Picker

version (158 KB) by Travis Wiens
Helps digitize graph data from an image.


Updated 18 Apr 2013

View License

Often we receive data in graphical form (e.g. from data sheets), but want that same data in numerical form. This can be time consuming to manually read points from a graph. This package provides a GUI to assist in this task.

One simply identifies two known x-values and two known y-values from the graph image as reference points. Then one may click on any point on the graph and the GUI will return its x and y value.

Works with linear and log scales. Also generates axes data if you want to plot other data over your image at the same scaling.

For more information, please see or

Cite As

Travis Wiens (2020). Graph Picker (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (4)


A handy tool! Easy to use. All functions are well-presented in the GUI.
Highly recommend.

Sebastian Hölz

To enable import of indexed images, change / insert the following for line 77:

[im, map] = imread(filename);
if ~isempty(map)
if ~isempty(map)
im = ind2rgb(im,map);

Sebastian Hölz

You should give the links to the required files (rotate_image, imclipboard).

Ligong Han


Fixed typo in description.

MATLAB Release Compatibility
Created with R2013a
Compatible with any release
Platform Compatibility
Windows macOS Linux