How to fix table variable related error?
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I am using the following matlab code
MdlReduced = fitrensemble(XX(:,{'td' 'ssr' 'tp'}),MPG,'Method','Bag', ...
'NumLearningCycles',200,'Learners',t);
But this is giving the following error
Error using ()
Unrecognized table variable name 'td'.
Please suggest me how to fix it?
Sanchit
2 个评论
Saurabh Chaudhary
2023-7-25
can you provide data for XX? Also look the documentation of fitrensemble.
Sanchit
2023-7-25
采纳的回答
Mrutyunjaya Hiremath
2023-7-25
Here It is ...
clc;
clear all;
close all;
data = readtable('sample.csv');
X = data(:, 1:end);
% Get the current variable names
currentVariableNames = data.Properties.VariableNames;
% Define the new variable names (use as many names as you have variables)
newVariableNames = {'d2m','t2m','ev','pev','ssr','ssrd','tp','vpd','rh','gpp'};
% Create a new table with the new variable names
data = array2table(data{:,:}, 'VariableNames', newVariableNames);
t = templateTree('PredictorSelection','interaction-curvature','Surrogate','on', ...
'Reproducible',true); % For reproducibility of random predictor selections
MdlReduced = fitrensemble(data(:,{'d2m' 'ssr' 'tp'}),data(:,'gpp'),'Method','Bag', ...
'NumLearningCycles',200,'Learners',t);
%Compute the R2 of the reduced model.
yHatReduced = oobPredict(MdlReduced);
r2Reduced = corr(MdlReduced.Y,yHatReduced)^2
更多回答（1 个）
Steven Lord
2023-7-25
You expected for your table XX to contain a variable named td, but it doesn't. If you were trying to adapt another example to your needs perhaps the table in the example had that variable but yours does not. You can check if XX has that variable name:
listOfVariableNames = XX.Properties.VariableNames
Does listOfVariableNames contain 'td'?
ismember('td', listOfVariableNames)
Without seeing how you constructed XX it's difficult to offer concrete suggestions for how to solve the problem. If you read the data in from a file perhaps the file headers were not what you expected them to be? If you constructed that table variable using an expression [like td(:, 1)] instead of a plain variable name [like td] then the table variable would not be named using the variable name. Setting the variable name using renamevars could be an option in that scenario.
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