How to extract the values of x and y from this matlab regression models?
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I have executed the matlab regression modeling (see the attached screenshot) but i want to extract the data of x,y into excel sheet to use it in drawing other plots.
can any one help me?
Regards
Ahmed
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Adam Danz
2020-8-30
编辑:Adam Danz
2020-8-30
Step 1) Access the (x,y) coordinates that are plotted within the Regression Learner App. If you can't extract the data directly from "export model", you could extract them from the app's figure.
- Get the handle to the app's axes. Here are two ways to do that.
- Once you have the handle, let's call is RLax, you can get the (x,y) coordinates of each plotted object using two lines below.
X = get(RLax.Children, 'XData');
Y = get(RLax.Children, 'YData');
X and Y will be cell arrays, one element for each line object, containing 1*n vectors.
Step 2) Convert the cell arrays to matricies. If each vector within the cell array is the same length, convert the cell array to a matrix using,
m = cell2mat(Y')';
If the vectors contain a different number of elements, you'll need to pad the shorter vectors with NaN values using,
maxNumCol = max(cellfun(@numel, Y)); % max length
m = cell2mat(cellfun(@(c){padarray(c,[0,maxNumCol-size(c,2)],NaN,'Post')},Y))';
Both versions result in an m*n matrix of m observations and n variables.
Step 3) Write the data to an excel file. If you only want to write the matrix,
writematrix(m, 'myData.xlsx')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/353663/image.png)
If you want to include column headers Y1, Y2, ..., Yn
T = array2table(m, 'VariableNames', compose('Y%d',1:size(mPad,2)));
writetable(T, 'myData.xlsx')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/353666/image.png)
For more info on writing to excel:
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