Answered
Error using vertcat Dimensions of arrays being concatenated are not consistent.
In the RRTSS1 script, "dist" is defined inside an "if" statement without any "else" for "dist" value. So if Reach=0, then ans =...

6 years ago | 0

Answered
How to divide data into train/valid/test sets such that one sample from every class is selected?
Set 'Stratify' option to 'True'. cv = cvpartition(data(:,1),'KFold',5,'Stratify',true);

6 years ago | 0

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Answered
Determine first and second derivatives, without using builtin diff function, using forward differencing with 0 dx error
dfdx = zeros(size(f)); d2fdx2 = zeros(size(f)); dfdx(2:end) = f(2:end)-f(1:end-1); d2fdx2(2:end) = dfdx(2:end) - dfdx(1:e...

6 years ago | 0

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Answered
How to calculate the optimal thickness
Assuming, optimal thickness yields maximum refraction, m = find(R==max(R)) optimal_thickness = d(m) % ans = % 1.9192e-07...

6 years ago | 0

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Answered
Problem with the TreeBagger Command
The Training_Output variable has to be a vector of size 6768X1 instead of a matrix.

6 years ago | 0

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how i can use confusion_matrix for result of image classification using knn?
yhat = predict(model,x); C = confusionmat(y,yhat)

6 years ago | 0

Answered
How do I improve my result of KNN classification using confusion matrix?
yhat = predict(model,x); [C,order] = confusionmat(y,yhat); Use this help file to understand how to use C and order: https://w...

6 years ago | 0

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Convolution of two piecewise signals returning zero (exercise 2 in attachment)
t = -10:1/10:10; x = zeros(1,length(t)); h = zeros(1,length(t)); for i=1:numel(t) if t(i)<0 || t(i)>2 x(i) = 0;...

6 years ago | 0

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Answered
transform column and row data of logical matrix to vector(N X 2)
logical_matrix = [0 0 0 0; 0 1 0 0; 0 0 0 0; 0 0 1 0; 0 1 0 1]; [i,j] = find(logical_matrix); vector_matrix = [...

6 years ago | 0

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