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Ajay Goyal


Last seen: alrededor de 1 mes ago

Indian Institute of Technology Ropar

27 total contributions since 2015

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Question


How to convert data around a circle for circular statistics?
I have generated 36 values at equidistant distances at an interval of 10. I want to convert it to circular data. Is there a way?...

más de 2 años ago | 1 answer | 0

1

answer

Question


How to see difference in color which has been overlapped between two fills?
I have two curves; for example clc; clear all; close all; x1=[-1:0.01:1]; y1=1-x1.^2; x2=[-2:0.01:2]; y2=1-x2....

casi 3 años ago | 1 answer | 0

1

answer

Question


How to determine over-fitting from non linear least square optimization tool?
I have developed a non-linear equation. It has 4 parameters to be optimized. I have trained the function with 10 experimental da...

más de 3 años ago | 1 answer | 0

1

answer

Question


How to add standard errors in bar charts (hatched)?
I have got 4 categories (say A,B,C,D) each having 3 values i.e. bar_3_categories=[1 2 3 4;1 2 3 4;1 2 3 4]; Error bars are e...

más de 3 años ago | 1 answer | 0

1

answer

Question


How to check optimized values after stopping the program midway?
I am using lsqnonlin (Levenberg-Marquardt algorithm) code to optimize 4 variables as can be seen in attached file. Many times I ...

alrededor de 4 años ago | 1 answer | 0

1

answer

Question


How to define following function?
I have two row vectors (say A1(1:5) and B1(1:5)). I wish to define a function 'a(t)' as given below. I am repeatedly getting err...

alrededor de 4 años ago | 1 answer | 0

1

answer

Question


How to generate a function from x-y vectors?
Hello MATLAB users. I got two vectors (say x and y). Is there any way to create a function i.e. y=f(x). I do not want the expres...

alrededor de 4 años ago | 4 answers | 0

4

answers

Question


How to convert time signal in frequency signal?
I have an equation de/dt=C1*(ds/dt)+C2*s. C1,C2=constants, e=strain, s=stress, d/dt=derivative wrt time (t). I want to conve...

más de 4 años ago | 1 answer | 0

1

answer

Question


How to make contour plots at a given section?
I got a circle. It has values ranging from -5:5 at its various points including circumference. I want a similar plot as attached...

más de 4 años ago | 0 answers | 0

0

answers

Question


Can anyone help me with fourier series of a signal?
I got a signal as attached. My doubt is can I break the signal in a triangle and a straight line, then calculating fourier serie...

más de 4 años ago | 1 answer | 0

1

answer

Question


what are x-axis and y-axis labels in residual plots in stepwise regression?
I have generated histograms residual plots in stepwise regression. As per my understanding, the x-axis is residual and the y-axi...

alrededor de 5 años ago | 0 answers | 0

0

answers

Question


How to get critical values and P values of F statistic and T statistic?
I am trying to develop a multivariable regression model having 2 input vectors and one output vector. there are 10 observations....

alrededor de 5 años ago | 1 answer | 0

1

answer

Question


How to get possible combinations of variables?
Dear Friends, I have got 20 vectors named (A1,A2...A20) with say 500 observations. I wanted to generate all possible combination...

alrededor de 5 años ago | 1 answer | 0

1

answer

Answered
Sum each element in a matrix with the previous elements on the same diagonal
Simple Brother, Use a(i,j)=a(i,j)+a(i-1,j-1) in your double loop (for i=1:2000(for rows); for j=1:2000(for columns)) Thanks fo...

alrededor de 5 años ago | 0

Question


How to Invert functions with same input variables?
Dear Sirs, I want to invert following set of equations: Y(i)=a(i)X1+b(i)X2+c(i)X3+d(i)X1X2+e(i)X1X3+f(i)X2X3+g(i)X1^2+h(i)X2...

alrededor de 5 años ago | 1 answer | 0

1

answer

Answered
Least squares method of estimation and removing of outliers
Solve inverse of the problem and use stepwise linear regression (stepwiselm) or simply least square method (regress). Then gener...

más de 5 años ago | 0

Question


How to determine whether to remove a generated outlier or not in stepwise regression?
Dear Friends, I have developed a stepwise regression model. I am getting a outlier. I need to know the effective weight of the ...

más de 5 años ago | 1 answer | 0

1

answer

Question


How to predict output values of new data in stepwise regression?
Dear Friends, I have generated a stepwise quadratic model using stepwiselm. At start of running the code, I have divided my trai...

más de 5 años ago | 1 answer | 0

1

answer

Question


HOW TO CHOOSE EFFECTIVE PARAMETERs IN STEPWISE REGRESSION?
Dear friends, I got 80 independent variables and one dependent variable with 1000 datasets. I was performing stepwise regressio...

más de 5 años ago | 1 answer | 0

1

answer

Question


Should I expect to get a better answer from stepwise regression model if input variables are 20 with 550 observations and one output variable
I am using stepwise regression to generate a model. There are 20 input variables and 1 output variable with 550 observations. I ...

más de 5 años ago | 0 answers | 0

0

answers

Question


I am getting p values more than 0.05 while doing step regression? How to handle the resulted equation
Dear Sirs, I am using stepwise regression using 'stepwiselm' function. In my resulted equation, I am getting following p values...

más de 5 años ago | 1 answer | 0

1

answer

Question


How to generate a signal with single frequency from a signal with number of frequencies?
Sirs, I have got a signal with 17 frequencies (side by side) i.e frequency 1 is followed by 2 and then 3..... upto 17Hz. I am ...

más de 5 años ago | 0 answers | 0

0

answers

Question


Numbering lines passing through centre of circle and located at 0,90,180,270 degrees
I have a circle of radius (say 5mm) and centre (say(0,0)). I have drawn 4 lines each at 90 degrees all passing trough centre of ...

más de 5 años ago | 1 answer | 0

1

answer

Question


How to get mathematical expression of input and target in artificial neural network
I have four input vectors of (1*36) matrix each and one output vector (1*36). I want to develop a coding using ANN which not onl...

alrededor de 6 años ago | 0 answers | 0

0

answers

Question


How to get Equation of Function developed by ANN (Curve fitting) after training
Can I get equation of the function in Curve fitting using Artificial Neural Network after training the inputs and outputs

alrededor de 6 años ago | 1 answer | 0

1

answer

Answered
How to get centroid specific part of an image
Christiaan Sir, Your help is deeply appreciated. You made my day since I was working on this problem for last 3 days. I have ma...

alrededor de 6 años ago | 0

Question


How to get centroid specific part of an image
I am intended to compute centroid of a part of image. I am getting centroid of all parts of the image which makes me confused of...

alrededor de 6 años ago | 3 answers | 2

3

answers