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Sattik Basu


Last seen: 1 year ago |  Active since 2017

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Convert function handle to a function in ODE45
Suppose I have a symbolic matrix J J = [2*y(1), 4*y(2), y(1)*y(2); y(3), 2*y(1)^2, 5*y(2); 5*y(3), 2*y(2)*y(1), 2*y...

1 year ago | 1 answer | 0

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Question


Obtaining assembled FEMatrices and then further changing them to be used as inputs
The MKAF matrices (and the BC matrices) can be obtained by using using the assembleFEMatrices command. Let's say, I obtain the m...

2 years ago | 1 answer | 1

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Question


Non-constant Numerical coefficients (m,d,a,c,f)
The pdetoolbox is equipped to solve a PDE with non-constant coefficients. However, from what i read in the manuals, the coeffici...

2 years ago | 1 answer | 0

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Question


PDE Toolkit - what is d when m is non-zero?
To solve the following equation we need to input values of m,d,c,a and f. I have been able to input m,c,a,f, however, for d,...

2 years ago | 1 answer | 0

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Question


PdeModeler App Generic System of Equations are different from those in the Manual
I have uploaded from the PDE Toolbox manual, the kind of generic equation that can be solved using this toolbox. However, inside...

2 years ago | 1 answer | 0

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Question


Non-Linear Coupled First-Order ODEs (with multiple derivative terms in each equation).
I have looked extensively, and was not able to solve a system like this on Matlba. All this while, I have used Mathematica to so...

3 years ago | 1 answer | 0

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Question


how do i use BVP4C for these kind of coupled odes?
The equations are coupled C1 p(x) + C2 dp(x)/dx + C3 u(x) + C4 du(x)/dx = 0 C5 p(x) + C6 dp(x)/dx + C7 u(x) + C8 du(x)/dx...

6 years ago | 1 answer | 0

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Question


solution of coupled first order odes numerically
eqn1 = coeff1*var1 + coeff2*diff(var1) + coeff3*var2 +coeff4*diff(var2) == 0; eqn2 = coeff5*var1 + coeff6*diff(var1) + coeff7...

6 years ago | 1 answer | 0

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Question


why does a NaN in contourf display half the cell removed?
I used NaN for those particle cells. and instead of giving me a uniform figure, it removed a rotated square instead of just a sq...

6 years ago | 0 answers | 0

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Answered
too many input arguments in my imshow statement.
i have received the answer to this thanks to Walter Robinson. just added the following lines after the imshow command. images...

6 years ago | 0

Question


too many input arguments in my imshow statement.
it works fine before the jet is added to the statement. Do i have to call it separately, and if so, how? imshow(P,[],jet,'Ini...

6 years ago | 2 answers | 0

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Question


I am getting a colorbar with uniform color. I want there to be variations so the distribution makes sense.
The P matrix varies from 1 to 2, however the returned figure shows one square with one uniform color. it would be a great help, ...

6 years ago | 1 answer | 0

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Question


How do I remove the printed data on the heat map?
For a smaller matrix, the data seems to be present on the heatmap output. Also, I tried set(gca....) and "axis off" to remove th...

6 years ago | 2 answers | 1

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Question


I made a Heat map. I want to remove the x and y axis ticks. How is that possible?
I tried using set(gca............), but that is for plot. i am stuck at this.

6 years ago | 3 answers | 1

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Question


I am getting the following error for the below code: Subscript indices must either be real positive integers or logicals. How can i remove that error.
clc clear all g=9.81; u=10; t=0:.1:10; y(1)=0; while (y(t)>=0) y(t)=(u*t)-(0....

6 years ago | 1 answer | 0

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