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sasha


Actif depuis 2014

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Question


plotting step function with variable step length
I want to do a plot of y as a function of time. Where the values of y are either zero or one and they alternate. The time that y...

environ 10 ans il y a | 1 réponse | 0

1

réponse

Question


Stand alone C file
I have my matlab code which is working, but a little slow. I want to write it for C, but I have an error that comes up when I us...

environ 10 ans il y a | 2 réponses | 0

2

réponses

Question


numerically integrate multidimensional function along one dimension.
I have a function: f(x,y,z). I want to numerically integrate this function along x and be left with a function of only y and z. ...

plus de 10 ans il y a | 2 réponses | 0

2

réponses

Question


Does order of multiplication in a for loop matter?
I am currently trying to rewrite my code in a way to get rid of the for loops I have, but as I was doing that, I stumbled on som...

plus de 10 ans il y a | 2 réponses | 0

2

réponses

Question


how to vectorize a for-loop or use parfor to speed it up?
I have this for loop right now: for x = 2:Nx_max-1 for y = 2:Ny_max-1 lp(x,y,t1) = (1/(2*h^2))...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question


speeding up nested for loops
I have a couple of nested for loops that take a very long time to calculate. Basically they look like: for x= 1:Nx for...

plus de 10 ans il y a | 2 réponses | 0

2

réponses

Question


question regarding what is allowed in a parfor loop
I am confused about a section of the description of how to use parfor: " Next assume that A, B, and C are variables and that ...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question


How to save an array output to file every 1000 iterations?
My array is 201 by 201. And I want to watch it evolve by looking at every 1000 steps in time. Basically I have an initial array ...

plus de 10 ans il y a | 4 réponses | 0

4

réponses

Question


Trying to define an array as the derivative of the terms of another array gives just zeros.
I have this code. Most of it is working fine. The problem is when I'm trying to define the array dpx and dpy. Instead of giving ...

plus de 10 ans il y a | 1 réponse | 0

1

réponse

Question


Why is my if statement making the values of a previous array disappear?
My code basically looks like: for x = 1:xmax for y = 1:ymax for l = 1:xmax for m = 1:ymax ...

plus de 10 ans il y a | 2 réponses | 0

2

réponses

Question


How to save only latest ~10 iterations on for loop
I'm trying to run a for loop that will give me a new iteration of a matrix at each time step. The problem comes in because I nee...

plus de 10 ans il y a | 2 réponses | 0

2

réponses