Whhy it shows 'Undefined function or variable 'confMat'; Please check me code. I cant plot the confusion matrix

Question

Wyot 2018-6-3

0
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https://ww2.mathworks.cn/matlabcentral/answers/403824-whhy-it-shows-undefined-function-or-variable-confmat-please-check-me-code-i-cant-plot-the-confu

回答： Walter Roberson 2018-6-4

L = 3 ;
figure ('visible','on');
imagesc(confMat);colormap(flipud(gray)) ; caxis ([0,1])
textstr=num2str(confMat(:),'%0.2f');
textstr=strtrim(cellstr(textstr));
[x,y]=meshgrid(1:L);
hstrg=test(x(:),y(:) , textstr(:),
'HorizontalAlignment','center',
'FontSize',10,'FontName','Times New Roman');
midvalue=mean(get(gca,'Clim'));
textColors=repmat(confMat(:).midvalue,1,3);
set(gca,'XTick',1:L, 
'XTickLabel',
{'Unripe','Ripe','Fruit'};