MATLAB Answers

Failed to Call Classification Learner's Testing Function

51 ビュー (過去 30 日間)
Angga Lisdiyanto
Angga Lisdiyanto 2016 年 1 月 20 日
編集済み: Walter Roberson 2020 年 12 月 22 日
I was using a Matlab R2015b's Classification Learner Toolbox. I was successful in importing file data and export it into an Export Model, and i got a structure named trainedClassifier.
Import process #1
Import process #2
Training process with PCA implemented & Multi Class SVM (One vs All validation)
trainedClassifier variable generated from ToolBox
fetureVector variable which used for testing
yfit = trainedClassifier.predictFcn(featureVector)
After it, i want to doing a test with a new data with this code (i got this code from here ) :
>> yfit = trainedClassifier.predictFcn(featureVector)
Then i got an error output as a follows :
Function 'subsindex' is not defined for values of class 'cell'.
Error in mlearnapp.internal.model.DatasetSpecification>@(t)t(:,predictorNames) (line 135)
extractPredictorsFromTableFcn = @(t) t(:,predictorNames);
Error in mlearnapp.internal.model.DatasetSpecification>@(x)extractPredictorsFromTableFcn(splitMatricesInTableFcn(convertMatrixToTableFcn(x)))
(line 136)
extractPredictorsFcn = @(x) extractPredictorsFromTableFcn(splitMatricesInTableFcn(convertMatrixToTableFcn(x)));
Error in mlearnapp.internal.model.DatasetSpecification>@(x)exportableClassifier.predictFcn(extractPredictorsFcn(x)) (line 137)
exportableClassifier.predictFcn = @(x) exportableClassifier.predictFcn(extractPredictorsFcn(x));
What is the problem and solutions?
Thanks in advance.
  11 件のコメント
Mrutyunjaya Hiremath
Mrutyunjaya Hiremath 2020 年 4 月 12 日
'testingData.xlsx' contains only 512 colums feature vector of tesing data or matrix of N X 512.
testingData = xlsread('testingData.xlsx');
yFit = trainedClassifier.predictFcn(testingData);

サインインしてコメントする。

採用された回答

Walter Roberson
Walter Roberson 2016 年 4 月 9 日
You have
yfit = trainedClassifier.predictFcn(featureVector)
and my reading just now suggest that perhaps needs to be
yfit = predict(trainedClassifier, featureVector)
The error message indicates that something is trying to be indexed using a cell array as a subscript, which is a valid indexing method for tables but not an indexing method for a double array.
  18 件のコメント
Fatma HM
Fatma HM 2020 年 12 月 20 日
NN Did you found the answer? Plz I need it too

サインインしてコメントする。

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by