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Sharda


IIT Delhi

Last seen: 4 mesi ago Active since 2015

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How can I test the performance of a simulink model in real-time ?
Hi, I want to test the performance of a proposed prediction model based on support vector regression in real-time. The model is ...

oltre 5 anni ago | 1 answer | 0

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answer

Question


Why does grid search cross validation give same value of mean square error for different values of C and gamma in support vector regression ?
I am using libsvm in matlab for  time series prediction using support vector regression . When I use grid search cross validatio...

oltre 6 anni ago | 0 answers | 0

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answers

Question


Why do parameters in output of my support vector regression are going to zero?
I am trying to predict next value in a time series from epsilon-support vector regression using libsvm library in matlab.Followi...

oltre 7 anni ago | 0 answers | 0

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answers

Question


Why am I getting empty matrix from svmpredict ??
I want to make predictions from a simple time series. The observations y=[11,22,33,44,55,66,77,88,99,110] at time x=[1,2,3,4,5,6...

oltre 7 anni ago | 0 answers | 0

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answers

Question


How to fix co variance matrix going singular in Gaussian mixture model implementation ??.
I am implementing GMM in matlab without using any machine learning library. I am able to initialize the parameters ,perform expe...

oltre 7 anni ago | 0 answers | 0

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answers

Question


How to cluster handwritten digits using k-means with K=10 ?
I have to implement K-means algorithm for K=10 on handwritten digits data. The data matrix is 2500 X 784,i.e there are 2500 data...

oltre 7 anni ago | 0 answers | 0

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answers

Question


How to perform one versus one multi class classification using LIBSVM ?
I have a data set with 15 features and 10 classes. I am not able to understand how to perform one versus one multi class classif...

oltre 7 anni ago | 0 answers | 0

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answers

Question


Lasso Regularization using Matlab
I want to find the value of parameter estimates using lasso function in matlab. X is my input(which is 20X1) vector and Y is the...

oltre 7 anni ago | 0 answers | 0

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answers

Question


Perform crossvalidation through matlab.
I have performed polynomial regression on a data set.Now I want to use validation approach to characterize the goodness of fit f...

oltre 7 anni ago | 0 answers | 0

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answers

Question


Error functions in curve fitting regression problem.
I want to perform a curve fitting regression analysis by using absolute deviation (S=sum{i=1 to n}|y(i)-f(x(i)|,where y(i) is th...

oltre 7 anni ago | 1 answer | 0

1

answer

Question


How to find y in polyfit(x,y,n) ??
I have a set of points against time and I want to see what degree of polynomial best fits my data set.For this I am using the po...

oltre 7 anni ago | 1 answer | 0

1

answer

Question


Order of ARIMA process
I am trying to model a data series using ARIMA model. The series seems non stationary because the acf decays very gradually.Even...

oltre 7 anni ago | 0 answers | 0

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answers

Question


Interpret the plot of partial auto correlation function
<</matlabcentral/answers/uploaded_files/23725/pacf.jpg>> I am trying to plot acf and pacf for a series of data.The acf plot d...

oltre 7 anni ago | 0 answers | 0

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answers

Question


I want to plot the auto correlation function for 15 numbers without using the inbuilt function. My series is P=[ 47,64,23,71,38,64,55,41,59,48,71,35,57,40,58 ] and the plot should be autocorrelation function vs lags.
I want to plot the auto correlation function for 15 numbers without using the inbuilt function. My code is as follows: P...

circa 8 anni ago | 2 answers | 0

2

answers