MATLAB Answers

Error during classification using SVM

1 view (last 30 days)
Balaji M. Sontakke
Balaji M. Sontakke on 20 Feb 2020
Error using svmtrain (line 234)
Y must be a vector or a character array.
Error in inv_Moment_maintotaldemo (line 86)
model=svmtrain(train_label,P_train);
clear all;
clc;
%% BUILD DORSAL HAND VEIN TEMPLATE DATABASE
tic; %% calculating elapsed time for execution
%% load mat files
load('db3.mat');
load('db4.mat');
%% reshape into row vector
reduced_testdata = reshape(reduced_testdata,1,4,10); % one row,four column and 15(60/4) group for 20 classes
reduced_traindata = reshape(reduced_traindata,1,4,20); % one row,four column and 45(180/4) group for 20 classes
%% adjust dimension
% Adjust matrix dimension
P_test = cell2mat(reduced_testdata); % Convert cell array to matrix
P_train = cell2mat(reduced_traindata);
%% rearranges the dimensions of P_test and P_train
C = permute(P_test,[1 3 2]);
P_test = reshape(C,[],size(P_test,2),1);
C = permute(P_train,[1 3 2]);
P_train = reshape(C,[],size(P_train,2),1);
%% labeling class
train_label=load('train_label.txt');
test_label=load('test_label.txt');
% %%% Normalisation
%
% P_train=P_train/256;
% P_test=P_test/256;
%% Normalisation by min max
P_train=mapminmax(P_train,0,1);
P_test=mapminmax(P_test,0,1);
%% Normalisation by Z - Scores
% P_train = zscore(P_train,0,2);
% P_test =zscore(P_test,0,2);
%% %%PCA low dimension reduction
P_train = P_train';
model = perform_pca(P_train,rank(P_train)-1);
test_features= linear_subspace_projection(P_test, model, 1);
P_train=model.train';
P_test=test_features';
%% SVM classifier
model=svmtrain(train_label,P_train);
[predicted_label, accuracy, decision_values]=predict(test_label,P_test,model);
[FPR, TPR,Thr, AUC, OPTROCPT] = perfcurve(predictlabel, test_label,3);
figure,
plot(TPR,FPR,'r-','LineWidth',1);
xlabel('False positive rate')
ylabel('True positive rate')
title('ROC Curve for Classification ')
Tbl = table(FPR, TPR,Thr)
fprintf('\n\n Overall accuracy:%f%%\n',cp.CorrectRate*100);
%% calculating elapsed time for execution
toc

  0 Comments

Sign in to comment.

Answers (0)

Tags

Community Treasure Hunt

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

Start Hunting!