# Vira Roy

Research Scholar at IIT Kharagpur.

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Python

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**Content Feed**

Question

Plotting the content of huge matrix.

Problem: I have a huge 449x10001 dimension matrix and want to make a scatter plot from that. While for loop works good enough fo...

5 months ago | 1 answer | 0

### 1

answerQuestion

Manipulating a multidimensional array.

PROBLEM: I have managed to create a multidimensional array storing eigenvectors of a hamiltonian. Now I want to manipulate the a...

6 months ago | 1 answer | 0

### 1

answerQuestion

Energy eigenvalues plot of a Hamiltonian(Weyl)

Question: I have a Hamiltonian which I have to construct in a meshgrid and then plot the energy eigenvalues to get a surf plot. ...

9 months ago | 1 answer | 0

### 1

answerQuestion

Matrix form for a square lattice arrangement.

Question: I want to have a matrix form for hopping between nearest points on a square lattice. My Attempt: To start and explai...

1 year ago | 2 answers | 0

### 2

answersSolved

Make the vector [1 2 3 4 5 6 7 8 9 10]

In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

1 year ago

Solved

The Piggy Bank Problem

Given a cylindrical piggy bank with radius g and height y, return the bank's volume. [ g is first input argument.] Bonus though...

1 year ago

Question

Matrix form for creation and annihilation operator with spins.

This might be little geared towards physics but if anyone can help, it would so much helpful for me. So basically I want the mat...

1 year ago | 1 answer | 0

### 1

answerQuestion

Comparing the entries of matrix in pairs

Problem: I have a matrix A (of n by m dimension) which for this example is 10 by 3. Now I want to compare the entries of the ma...

1 year ago | 1 answer | 0

### 1

answerQuestion

Generation of a basis vector following a constraint.

Problem: I Want to generate a set of basis vectors which follows the constraint . While I can do that as seen from the below wo...

1 year ago | 1 answer | 0

### 1

answerQuestion

Solving a system of differential equations using ODE45 by switching between two functions depending upon the solution obtained in last iteration.

Problem: I have a system of two coupled differential equations but i want to put an conditional statement so that depending upon...

2 years ago | 1 answer | 0

### 1

answerQuestion

3 dimensional plotting by varying the initial conditions

I have a set of four differential equations(DE) and I want to see how one of them varies with the other two. I can solve the equ...

2 years ago | 1 answer | 0

### 1

answerQuestion

3D Phase portrait for a set of differential equations

I have a set of three differential equations and I want to make a phase portrait of them. I have some idea of using quiver or pl...

2 years ago | 1 answer | 0

### 1

answerQuestion

Solving system of Non-linear Equations graphically

Problem Statement: I want to solve a set of equations graphically by plotting their graphs and looking at the interesection. I k...

2 years ago | 1 answer | 0

### 1

answerQuestion

Eigenvalues of a Matrix for a mesh of values and 3D plot.

Problem: Here is what i want to do. I need to construct an Hamiltonian matrix of dimension 2 by 2, then diagonalise it and find ...

3 years ago | 1 answer | 0

### 1

answerQuestion

Plotting of null surfaces and Warning: Matrix is singular to working precision.

Problem: I have the following three sets of equation which i need to plot as planes in 3D system. ...

3 years ago | 0 answers | 0

### 0

answersQuestion

Numerical Integration from -Inf to Inf

Problem: I have the following integral which i need to evaluate numerically. ...

3 years ago | 1 answer | 0

### 1

answerQuestion

Executing a function in iterations

Problem Statement: I have a system of differential equations in which i need to run a particular function for n iterations using...

3 years ago | 1 answer | 0

### 1

answerQuestion

Adding a piecewise time dependent term in system of differential equation

Problem Statement: I have a system of differential equation and out of which few has time dependent coefficients and in my case ...

3 years ago | 2 answers | 1

### 2

answersQuestion

Data fitting to the solution of coupled differential equation with all the different parameters.

So here is my problem. The general idea is that, I have a set of data for growth (n) and time(t) which i need to fit to the coup...

3 years ago | 2 answers | 0