Community Profile # hello_world

39 total contributions since 2014

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Question

How to combine/aggregate multiple Gram matrices to yield a one matrix by doing some desired matrix manipulations?
Let, X = [1, 2, 3, 4; 5, 6, 7, 8; 9, 10, 11, 12; 13, 14, 15, 16; 17, 18, 19, 20;...

9 months ago | 0 answers | 0

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Question

How to combine binary classifier's results to output multi-class classification adopting File Exchange example in Libsvm's precomputed svmtrain?
In File Exchange example: <https://www.mathworks.com/matlabcentral/fileexchange/39352-multi-class-svm> under %build model headi...

10 months ago | 0 answers | 0

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Question

How to use if, else conditional loop on anonymous function handle?
For the following example, given at <https://www.mathworks.com/help/stats/evalclusters.html>: eva = evalclusters(meas, 'kme...

12 months ago | 1 answer | 0

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Question

How to show class label of each data point in 3D scatter plot from clustering evaluation result?
How to show by plotting class label of each data point within each cluster obtained by any clustering? Here is an illustratio...

12 months ago | 1 answer | 0

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Question

MATLAB's custom distance function example for two matrices.
How does _MATLAB_'s *@distfun* work for two matrices. Suppose: X1 = rand(5); X2 = rand(3); How to compute the KL-Dive...

12 months ago | 1 answer | 0

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Question

LIBSVM: MATLAB function "trainsvm" deprecated and replaced by "fitcsvm"
As MATLAB ha depreciated "svmtrain" and replaced it by "fitcsvm", LIBSVM is giving error: % This is an example of using pre...

12 months ago | 1 answer | 0

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Question

MATLAB giving error while trying to create a 3D scatter plot: Error using sparse (Index exceeds array bounds)
I was following the MathWorks example: <https://www.mathworks.com/help/stats/tsne.html#bvkcm24-1> which works fine for fisheriri...

12 months ago | 1 answer | 0

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Question

How to save a function output to a variable with variable name changing dynamically?
I have two folders in two different paths. These two folders contain *.csv* data files. I want to load these *.csv* data files f...

1 year ago | 1 answer | 0

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Help with scope issue in Matlab
Hello, Any progress on this code so far? If so, can you share the code?

1 year ago | 0

Question

How to convert a .csv file of cell array type to double?
I have multiple *.csv* files of type *Cell*. I have attached 3 of these files for illustration and a *data.csv* file of type _do...

1 year ago | 1 answer | 0

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Question

Plotting with peaksOutputFcn function in optimization probblem.

3 years ago | 0 answers | 0

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Question

How to make output of a function available to script without function call?
Hello Friends, I have the following function in *myFun.m* file: function f1 = myFun1(X,Y) [f1,f2] = myFun2(X,Y); ...

3 years ago | 2 answers | 0

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Question

How to insert a saved .png figure into a subplot which is being created in a for loop?
Hello Friends, I have the following code for k = 1:2 subplot(1,3,k) plot(randi(10,k)); end I want to insert...

3 years ago | 2 answers | 0

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Question

Convert for loop to vector multiplication.
Hello Friends, I have the following: A = [1 2 3; 4 5 6; 7 8 9]; B = [10 11 12; 13 14 15];...

3 years ago | 1 answer | 0

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Question

Manipulation of matrix addition and multiplication.
Hello Friends, I have the following: A = [1 2 3; 4 5 6; 7 8 9]; B = [10 11 12; 13 14 15]; [N1, D1] = size(A);...

3 years ago | 1 answer | 0

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Question

Rewriting a vector addition and multiplication.
Hello Friends, I have the following: A = [1 2 3; 4 5 6; 7 8 9]; B = [10 11 12; 13 14 15]; [N1, D1] = size...

3 years ago | 2 answers | 0

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Question

Distance and clustering.
In k-means clustering code which uses Euclidean distance. I want to replace Euclidean distance by Mahalanobis distance.

3 years ago | 1 answer | 0

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Question

How to optimize k*x <= epsilon?
Hello Friends, I want to optimize, i.e., find the optimal value of *k* in the following problem: max k*x <= epsilon H...

3 years ago | 1 answer | 0

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Question

How to edit MATLAB file kmeans.m?
Hello Friends, I want to edit kmeans.m but it does not allow me to make any changes. I tried *'fileattrib'* to make it writab...

3 years ago | 1 answer | 0

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Question

fwrite to fread changes data completely!
Hello Friends, I have a Vector or some length, say, *1 x N* with real number entries. I want to save this vector by usin...

3 years ago | 1 answer | 0

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Question

How to declare global variables in a script file which are accessible to a function file?
Hello Friends, I have a script file and a function file. My script file have a parameter which I want to be accessible to the...

3 years ago | 1 answer | 0

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Question

How to declare multiple global variables?
Hello Friends, I have multiple variables in my script file, say, *var1, var2, var3*. I want to declare them global variable. ...

3 years ago | 2 answers | 1

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Question

How to convert a matrix of cell to type double.
Hello Friends, I have a cell matrix *X* of size *NxD* as follows: X = [5.1000] [3.5000] [1.4000] [0.2000] 's...

3 years ago | 1 answer | 0

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Question

How to extract labeled rows of a matrix?
Hello Friends, I have a matrix *X* of size *NxD*, where the *Dth* column is labeled. For example: X = [1, 2, 3, Sunday ...

3 years ago | 3 answers | 0

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Question

How to compare each content of string which is of type double (matrix) in if loop recursively?
Hello Friends, I have the following code: P = [1 , 0, 2]; AB = [1, 2, 3]; CD = [4, 5, 6]; EF = [7, 8, 9]; ...

3 years ago | 2 answers | 0

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Question

MATLAB cannot call or index into a temporary array in for loop
Hello Friends, Here is my code: M = {'a', 'b', 'c'}; for i = length(M) M(i) = M(i)(M(i)~=0); end In...

3 years ago | 2 answers | 0

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Question

Indexing in for loop in order to remove non-zero and nan entries from vectors
Hello Friends, I have the following code: P = [1, 0, 3]; Q = [0, 4, 5]; % These AB, CD, EF are just for illu...

3 years ago | 1 answer | 0

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Question

for loop indexing in temporary arrary problem in MATLAB.
Hello Friends, I have the following code: P = [1, 0, 3]; Q = [0, 4, 5]; AB = [P + Q]; % A vector CD = [P -...

3 years ago | 2 answers | 0

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Question

How to get each pair of of row of a matrix to pass into a function?
Hello Friends, I have a matrix A of size N x M. I want to get all possible pair of rows, pass them into a function, and get t...

3 years ago | 2 answers | 0

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Question

How to load multiple csv files and save them after converting into arff files?
Hello Friends, I have several csv files, all stored in path 'C:\Users\Name\Documents\MATLAB\*.csv'. I want to loop one by one...

4 years ago | 1 answer | 0