John D'Errico
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How to use the constant e in MATLAB?
There are significant issues in this. Some (@Harsh, for example) have suggested creating a variable named e. And while this can ...
How to use the constant e in MATLAB?
There are significant issues in this. Some (@Harsh, for example) have suggested creating a variable named e. And while this can ...
4 days 前 | 0
已回答
Can we simulate a material suddenly becoming unstable in MATLAB ?
This is probably closer to a thesis level question in mechanical engineeering than one for Answers, at least, depending on how d...
Can we simulate a material suddenly becoming unstable in MATLAB ?
This is probably closer to a thesis level question in mechanical engineeering than one for Answers, at least, depending on how d...
13 days 前 | 1
| 已接受
已回答
Find x from y using a fit equation?
The simple and fully general solution is to use fzero. For example... x = rand(20,1); y = 2*x + 3 + randn(size(x))/5; plot(x,...
Find x from y using a fit equation?
The simple and fully general solution is to use fzero. For example... x = rand(20,1); y = 2*x + 3 + randn(size(x))/5; plot(x,...
20 days 前 | 1
| 已接受
已回答
Find angle from equation has sin(theta)/theta
Note that there is no analytical solution to a problem with sin(theta)/theta. This is as opposed to the very similar looking for...
Find angle from equation has sin(theta)/theta
Note that there is no analytical solution to a problem with sin(theta)/theta. This is as opposed to the very similar looking for...
23 days 前 | 0
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Error while outputting graph
I'm pretty sure you want to substitute in different values of the undetermined constants, then plot each corresponding curve, bu...
Error while outputting graph
I'm pretty sure you want to substitute in different values of the undetermined constants, then plot each corresponding curve, bu...
2 months 前 | 0
| 已接受
已回答
Does anyone know why no matter what I change, I cant get dsolve to work?
I dropped out some of the stuff you did that was unnecessary. For example, the first line creates y(t), and implicitly also defi...
Does anyone know why no matter what I change, I cant get dsolve to work?
I dropped out some of the stuff you did that was unnecessary. For example, the first line creates y(t), and implicitly also defi...
2 months 前 | 0
已回答
What is the ECCN of Matlab 2014
I would argue that any release of MATLAB will live under the same ECCN. The wording in no way applies only to the current releas...
What is the ECCN of Matlab 2014
I would argue that any release of MATLAB will live under the same ECCN. The wording in no way applies only to the current releas...
2 months 前 | 0
已回答
Lake America used as a name in Mapping Toolbox
I know enough people at MathWorks to believe they will not be bullied into such a stupid thing. Ok, I hope not, trusting in the ...
Lake America used as a name in Mapping Toolbox
I know enough people at MathWorks to believe they will not be bullied into such a stupid thing. Ok, I hope not, trusting in the ...
2 months 前 | 1
| 已接受
已回答
Nonlinear Newton solver fails near resonance for porous moonpool model
Um, so what should we do? First, Newton's method is generally a great scheme. (You even understand that aspect from what I read ...
Nonlinear Newton solver fails near resonance for porous moonpool model
Um, so what should we do? First, Newton's method is generally a great scheme. (You even understand that aspect from what I read ...
2 months 前 | 0
已回答
How to multiple very large numbers in Matlab?
Remember that Excel, just like MATLAB, is representing those numbers in a double precision form, and that limits you to roughly ...
How to multiple very large numbers in Matlab?
Remember that Excel, just like MATLAB, is representing those numbers in a double precision form, and that limits you to roughly ...
2 months 前 | 0
已回答
Histogram gives a wrong result？
Never assume that two mathematically identical floating point numbers will, if computed using different expressions, produce the...
Histogram gives a wrong result？
Never assume that two mathematically identical floating point numbers will, if computed using different expressions, produce the...
3 months 前 | 0
| 已接受
已回答
Please help me determine positive values of s and h(s,h>0) such that L1 and L2 have opposite signs. Then print L1 and L2
What have you tried? Look carefully at what you have. Take it apart, one piece at a time. a1=0.2494; a2=0.75; a3=0.01; a12=1.69...
Please help me determine positive values of s and h(s,h>0) such that L1 and L2 have opposite signs. Then print L1 and L2
What have you tried? Look carefully at what you have. Take it apart, one piece at a time. a1=0.2494; a2=0.75; a3=0.01; a12=1.69...
3 months 前 | 0
已回答
What exactly does ε represent in numerical computing
Just to add some more info... For example, pi(x) is known as the prime counting function to some, the number of primes less tha...
What exactly does ε represent in numerical computing
Just to add some more info... For example, pi(x) is known as the prime counting function to some, the number of primes less tha...
4 months 前 | 0
已回答
Why does parfor slow down with large shared arrays?
I can't test this myself, and I lack a great understanding of the parallel tools. But it looks like there are a few issues, main...
Why does parfor slow down with large shared arrays?
I can't test this myself, and I lack a great understanding of the parallel tools. But it looks like there are a few issues, main...
4 months 前 | 0
已回答
How to get abbreviations into vars?
Can you just exclude a term just by looking at it, without knowing the parameters in it? Given the complexity of the mess you ha...
How to get abbreviations into vars?
Can you just exclude a term just by looking at it, without knowing the parameters in it? Given the complexity of the mess you ha...
4 months 前 | 0
已回答
Why is vecnorm So Slow?
The jump is often a question of algorithm changes. You would be surprised how often algorithms exhibit nonlinear breaks. As I re...
Why is vecnorm So Slow?
The jump is often a question of algorithm changes. You would be surprised how often algorithms exhibit nonlinear breaks. As I re...
4 months 前 | 1
已回答
HDL coder support for Microchip high level synthesis tool SmartHLS
I'm sorry, but Answers is not a team. And we have no access to any information about timelines or any knowledge of when a given ...
HDL coder support for Microchip high level synthesis tool SmartHLS
I'm sorry, but Answers is not a team. And we have no access to any information about timelines or any knowledge of when a given ...
4 months 前 | 0
已回答
why does factor(1) return 1? shouldn't it return null?
Yes, I agree, in that f1 = factor(1) could arguably return empty. 1 is not indeed prime, and so the result is inconsistent wit...
why does factor(1) return 1? shouldn't it return null?
Yes, I agree, in that f1 = factor(1) could arguably return empty. 1 is not indeed prime, and so the result is inconsistent wit...
4 months 前 | 0
已回答
solve() returning empty, does a solution exist?
Just because solve returns empty does not mean a solution does not exist. In fact, most relations you can write down have absolu...
solve() returning empty, does a solution exist?
Just because solve returns empty does not mean a solution does not exist. In fact, most relations you can write down have absolu...
4 months 前 | 1
| 已接受
已回答
Saving my path for future sessions.
The trick here is to use the help, because it teaches you what to use, at least it gives you a hint at how to solve it. If you m...
Saving my path for future sessions.
The trick here is to use the help, because it teaches you what to use, at least it gives you a hint at how to solve it. If you m...
4 months 前 | 0
已回答
Help using the toeplitz function
20x20 is not large by any measure I would ever imagine. 20000x20000 might be large. :) Of course, large is a purely subjective a...
Help using the toeplitz function
20x20 is not large by any measure I would ever imagine. 20000x20000 might be large. :) Of course, large is a purely subjective a...
5 months 前 | 0
| 已接受
已回答
MATLAB Randomly Changes Values in Array to Scientific Notation
It is literally a certainty that some of those values are only approximately integer. No question in my mind. And is certainly n...
MATLAB Randomly Changes Values in Array to Scientific Notation
It is literally a certainty that some of those values are only approximately integer. No question in my mind. And is certainly n...
5 months 前 | 0
| 已接受
已回答
How to call kummerU for a stand alone program
You cannot do it from MATLAB, as stated by others. However, it looks like python does offer similar functionality. And I believe...
How to call kummerU for a stand alone program
You cannot do it from MATLAB, as stated by others. However, it looks like python does offer similar functionality. And I believe...
5 months 前 | 0
已回答
Can I solve a symetric system using only the lower triangular portion of the matrix?
You don't show your matrix. Only a picture of it, and a picture is not quite worth a thousand words all of the time. ;-) But co...
Can I solve a symetric system using only the lower triangular portion of the matrix?
You don't show your matrix. Only a picture of it, and a picture is not quite worth a thousand words all of the time. ;-) But co...
5 months 前 | 0
已回答
free trail doubt issue
After it ends in 30 days, it will just end. You will have a choice then of continuing your use of MATLAB by paying the normal fe...
free trail doubt issue
After it ends in 30 days, it will just end. You will have a choice then of continuing your use of MATLAB by paying the normal fe...
5 months 前 | 0
已回答
Volume and Surface Area of a Compound Geometric Object
First, alpha shapes tend to be poor at representing volumes with sharp internal corners, like those between the intersection of ...
Volume and Surface Area of a Compound Geometric Object
First, alpha shapes tend to be poor at representing volumes with sharp internal corners, like those between the intersection of ...
5 months 前 | 1
已回答
Call parameters by their variable name in Simulink rather than having to index the value.
If you can pass in a vector, then you can pass in a structure. Just assign fields to the structure. parameters.khch = 2; There...
Call parameters by their variable name in Simulink rather than having to index the value.
If you can pass in a vector, then you can pass in a structure. Just assign fields to the structure. parameters.khch = 2; There...
5 months 前 | 0
已回答
looking for creator of specific code
The codes I did find were a bit more sophisticated in general, and I did not expect to find anything. HOWEVER, when I looked on ...
looking for creator of specific code
The codes I did find were a bit more sophisticated in general, and I did not expect to find anything. HOWEVER, when I looked on ...
5 months 前 | 1
已回答
¿Cómo podría solucionar matrices por el comando [L,U]? no sé nada respecto al tema
I think your confusion stems from a misunderstanding. LU is fine, even with rank deficient matrices. As long as you use the MATL...
¿Cómo podría solucionar matrices por el comando [L,U]? no sé nada respecto al tema
I think your confusion stems from a misunderstanding. LU is fine, even with rank deficient matrices. As long as you use the MATL...
5 months 前 | 0
已回答
Convergence error in numerical method.
99,9% probable user error, 0.1%, it could be real. Hey we cannot know, since we don't see your code. But the point is, you hav...
Convergence error in numerical method.
99,9% probable user error, 0.1%, it could be real. Hey we cannot know, since we don't see your code. But the point is, you hav...
6 months 前 | 1
