MATLAB: Does MATLAB have a tool similar to “grabit”

grabitMATLAB

I found this tool called "grabit" on the File Exchange, but it seems like it has not been updated in a while. Does MATLAB have a built-in tool that does the same thing?

Here is the link to "grabit":

https://www.mathworks.com/matlabcentral/fileexchange/7173-grabit

Best Answer

No, the ability to extract data from a chart in an image file is not available in MATLAB R2014a. However, "grabit" should work with releases R2013b and R2014a. Contact the author of "grabit" for help.

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MATLAB: Are uint64 division operation results are rounded off

The result/output of 'uint64' division operation is by default rounded off.

Use 'idivide' function if you want to truncate.

 >> idivide(a,c)
 ans =
             116518096

Documentation link for 'idivide' function is below:

https://www.mathworks.com/help/matlab/ref/idivide.html

MATLAB: Using grabit with log scales

There is not any support for image with log-scale in GRABIT yet. However, as a workaround you could do the following.

For this particular image, in GRABIT, set the origin of the x-axis as 1 ( for 10^1) and the max of x-axis as 5 (for 10^5). Similarly for y-axis, set the origin as -2 ( for 10^-2) and the max of y-axis as 1 (for 10^1). After getting the points, you could do the following to get the same plot on a log-scale:

load('Data001.mat','Data001');
x = Data001(:,1);
y = Data001(:,2);
% convert the points to linear-scale
x = 10.^x;
y = 10.^y;
% plotting the points on the log-scale
loglog(x,y);

Best Answer

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MATLAB: Are uint64 division operation results are rounded off

MATLAB: Using grabit with log scales

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