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undefined function 'corrplot
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Hi, I wanted to create a graphical correlation matrix according using the corrplot function ( http://www.mathworks.com/help/toolbox/econ/corrplot.html) but when I try using the function I get the following message:
Undefined function 'corrplot' for input arguments of type 'double'.
I also looked for the function using 'which'- command. And I couldn't find the functiin. Is it possible that my Matlab version (2011b) doesn't have the function? Is it possible to download the function on the Mathworks website?
Thank you.
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Answers (3)
Adam Danz
on 17 May 2020
Edited: Adam Danz
on 25 Jun 2023
corrplot is part of the Econometrics Toolbox. Run this command to determine if you have the Econometrics Toolbox installed on your machine. It returns true (1) or false (0).
license('test','econometrics_toolbox')
Alternative
plotmatrix() is quite similar and with just a few additional lines, you can recreate most of the corrplot().
Here's a demo.
% Load data
load('carsmall')
% Unlike corrplot, plotmatrix cannot receive a table.
% Form a matrix of variables in each column.
data = [Horsepower, Weight, Acceleration, MPG];
nVars = size(data,2);
% Remove any rows that contain NaN values. Otherwise corr() will
% return NaN.
data(any(isnan(data),2), :) = [];
% Create plotmatrix
figure('Name', 'carsmall_data')
[sh, ax, ~, hh] = plotmatrix(data);
% Add axis labels
arrayfun(@(h,lab)ylabel(h,lab),ax(:,1), {'Horsepower','Weight','Accel.','MPG'}')
arrayfun(@(h,lab)xlabel(h,lab),ax(end,:), {'Horsepower','Weight','Accel.','MPG'})
% Compute correlation for each scatter plot axis
[r,p] = arrayfun(@(h)corr(h.Children.XData(:),h.Children.YData(:)),ax(~eye(nVars)));
% Label the correlation and p values
arrayfun(@(h,r,p)text(h,min(xlim(h))+range(xlim(h))*.05,max(ylim(h)),...
sprintf('r=%.2f, p=%.3f',r,p),'Horiz','Left','Vert','top','FontSize',8,'Color','r'),...
ax(~eye(nVars)),r,p)
% Change marker appearance
set(sh, 'Marker', 'o','MarkerSize', 2, 'MarkerEdgeColor', ax(1).ColorOrder(1,:))
lsh = arrayfun(@(h)lsline(h),ax(~eye(nVars)));
% Add least square regression line.
set(lsh,'color', 'm')
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/293718/image.png)
3 Comments
ClaireB
on 12 Jul 2023
Thanks for the nice example. i would like to use Spearman correlation instead of pearson but unsure where to add this in the following function
[r,p] = arrayfun(@(h)corr(h.Children.XData(:),h.Children.YData(:)),ax(~eye(nVars)));
Adam Danz
on 12 Jul 2023
Set the correlation type using a name-value pair
[r,p] = arrayfun(@(h)corr(h.Children.XData(:),h.Children.YData(:),'Type','Spearman'),ax(~eye(nVars)));
owr
on 25 Jun 2012
It looks like it was added in 2012A. I dont think there is anywhere to download just one function, too many dependencies, best thing would be to install 2012A if possible.
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Anni K
on 24 Jun 2023
Hi, I had the same problem. After downloading the toolbox Econometric Modeler, corrplot worked for me.
Good luck!
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