why do i get undeined function during multisvm(T​rain_Feat,​train_Labe​l,test) for the train _Label

while doing plant leaf disease classification using multiclass support vector machine train_label is not defined in the multisvm(Train_Feat,train_Label,test). How to define this variable?

[Nitigya Joshi]

I am getting same error.

Answer 1

[Walter Roberson]

multisvm appears to be https://www.mathworks.com/matlabcentral/fileexchange/39352-multi-class-svm

To use that routine, you need to have an array of training data, in which each row is a different sample, and each column is a feature. train_Label should be a vector of categorical or numeric values, with each entry indicating the group that the corresponding row of the training data belongs to. You would need to know what group each row of the training data belongs to in advance -- the point of training data is that you already know the "right" answer for each training sample and you use it to "train" the program to predict answers.

[FATHIMA C S]

ok thank you for your reply. actually i am very new to matlab and let me check

[NAVNISH GOEL]

hi.

i run main.m and i change the file train location and i choose testing there's an error ::

Error using imread>get_full_filename (line 516)

File "C:/Users/Manya/Desktop/Final File(mohim)/Train/Train (2).jpg" does not exist.

Error in imread (line 340)

fullname = get_full_filename(filename);

Error in Main (line 14)

I = imread(sprintf('C:/Users/Manya/Desktop/Final File(mohim)/Train/Train (%d).jpg', k));

Undefined function or variable 'Train_Feat'.

Error in Main (line 120)

result = multisvm(Train_Feat,Train_Label,feat_disease);

Help me to resolve this issue....

[Walter Roberson]

What main.m are you looking at? The File Exchange contribution linked to does not have a main.m

What do you see if you use

ls('C:/Users/Manya/Desktop/Final File(mohim)/Train/*.jpg')