Answered

How to improve the curve fitting for my data using matlab?

Think about your data. Think about the model you are trying to fit. If necessary, plot your data. Well, actually, plot it ALWAYS...

How to improve the curve fitting for my data using matlab?

Think about your data. Think about the model you are trying to fit. If necessary, plot your data. Well, actually, plot it ALWAYS...

14 days ago | 0

Answered

Matlab taking forever to give a simple result - something that java does in seconds

Your implementation is just plain silly. Sorry, but it is. You used modpow when you computed it with java. But when you tried to...

Matlab taking forever to give a simple result - something that java does in seconds

Your implementation is just plain silly. Sorry, but it is. You used modpow when you computed it with java. But when you tried to...

14 days ago | 3

| accepted

Answered

Constantly running out of memory - Would Parallel Computing fix this ?

Echoing what Walter has said - parallel processing is essentially never done to decrease memory load. If anything, it will more ...

Constantly running out of memory - Would Parallel Computing fix this ?

Echoing what Walter has said - parallel processing is essentially never done to decrease memory load. If anything, it will more ...

15 days ago | 0

Answered

How can I find circle diameter using arc ?

Use the entire curve if possible. Well, all of it that you have. Not just a couple of isolated points. Extract points from th...

How can I find circle diameter using arc ?

Use the entire curve if possible. Well, all of it that you have. Not just a couple of isolated points. Extract points from th...

15 days ago | 0

Answered

How do I turn a maxtrix to a vector

So, you cannot use reshape in a different way? Suppose you first transpose the matrix, and THEN used reshape? (Hint.) The poi...

How do I turn a maxtrix to a vector

So, you cannot use reshape in a different way? Suppose you first transpose the matrix, and THEN used reshape? (Hint.) The poi...

15 days ago | 1

Answered

Modulus of a negative exponent in matlab?

Um, actually your ststement is mistaken. It is not that MATLAB won't accept a negative exponent. It is that vpi/powermod won...

Modulus of a negative exponent in matlab?

Um, actually your ststement is mistaken. It is not that MATLAB won't accept a negative exponent. It is that vpi/powermod won...

15 days ago | 1

| accepted

Answered

Equivalent of interp1 for several sets of sampling (same data).

Sorry, but that is a limitation for a very good reason. They are different curves when you change x. Interp1 interpolates val...

Equivalent of interp1 for several sets of sampling (same data).

Sorry, but that is a limitation for a very good reason. They are different curves when you change x. Interp1 interpolates val...

15 days ago | 0

Answered

Hi, How can I resolve this error message, please "Array indices must be positive integers or logical values" Below are my lines of code:

This is why it is always important to read the ENTIRE error message, as that will tell you much. And if you don't understand the...

Hi, How can I resolve this error message, please "Array indices must be positive integers or logical values" Below are my lines of code:

This is why it is always important to read the ENTIRE error message, as that will tell you much. And if you don't understand the...

15 days ago | 0

| accepted

Answered

Solving linear matrix equation

I think you do not understand how MATLAB works, how it returns results? Perhaps you have only used other tools like Excel or Mat...

Solving linear matrix equation

I think you do not understand how MATLAB works, how it returns results? Perhaps you have only used other tools like Excel or Mat...

15 days ago | 0

Answered

How to avoid the increasing RAM need of fmincon

Um, what do you expect? When you try to solve an optimization problem, a classical quasi-Newton scheme will have a basic flow...

How to avoid the increasing RAM need of fmincon

Um, what do you expect? When you try to solve an optimization problem, a classical quasi-Newton scheme will have a basic flow...

19 days ago | 0

Answered

possible combination of a number

The trivial solution: loc = A.*B == 50; A1 = A(loc); B1 = B(loc); No, I won't show you how to solve this for signi...

possible combination of a number

The trivial solution: loc = A.*B == 50; A1 = A(loc); B1 = B(loc); No, I won't show you how to solve this for signi...

20 days ago | 0

| accepted

Answered

Can anyone help me fix my large straight Yahtzee function in MATLAB?

As I recall, a large straight in that game is one of two cases: the sequence [1 2 3 4 5], OR the sequence [2 3 4 5 6]. So if ...

Can anyone help me fix my large straight Yahtzee function in MATLAB?

As I recall, a large straight in that game is one of two cases: the sequence [1 2 3 4 5], OR the sequence [2 3 4 5 6]. So if ...

20 days ago | 0

Answered

Passing a line through 2 determined points of a dataset automatically

Your problem is one of definition. Until you do that, i.e., define what you mean by "middle", you can do nothing. In fact, t...

Passing a line through 2 determined points of a dataset automatically

Your problem is one of definition. Until you do that, i.e., define what you mean by "middle", you can do nothing. In fact, t...

21 days ago | 0

| accepted

Answered

Simple if loop doesn't work

What if loop? An if is not a loop. And you have no ifs in this code anyway. I'll assume you meant to say a for loop. A while loo...

Simple if loop doesn't work

What if loop? An if is not a loop. And you have no ifs in this code anyway. I'll assume you meant to say a for loop. A while loo...

21 days ago | 1

Answered

How to calculate memory required to do mldivide?

You can't do it in general if the matrix is sparse, because the sparsity pattern of the matrix is the important factor. How many...

How to calculate memory required to do mldivide?

You can't do it in general if the matrix is sparse, because the sparsity pattern of the matrix is the important factor. How many...

21 days ago | 1

| accepted

Answered

Numerically integrate function over 2D ellipse?

James. You clearly have not thought about what I said. I never said you need to use an analytical integration. All I showed was ...

Numerically integrate function over 2D ellipse?

James. You clearly have not thought about what I said. I never said you need to use an analytical integration. All I showed was ...

22 days ago | 0

Answered

Optimized filling of sparse matrix using spalloc

DON'T FILL A SPARSE MATRIX SLOWLY. You will virtually never be happy with the result. DON'T create those row and column arrays a...

Optimized filling of sparse matrix using spalloc

DON'T FILL A SPARSE MATRIX SLOWLY. You will virtually never be happy with the result. DON'T create those row and column arrays a...

23 days ago | 0

Answered

Efficient pairwise logical operation on all combinations of vectors?

Note that a big part of the problem may be that you are just doing a LOT of tests, and grabbing pretty large chunks of RAM to do...

Efficient pairwise logical operation on all combinations of vectors?

Note that a big part of the problem may be that you are just doing a LOT of tests, and grabbing pretty large chunks of RAM to do...

23 days ago | 0

| accepted

Answered

Plot a line between 2 points and extend the line a determined distance

Why do you need filline, or anything like it? And why are you worrying about angles, etc.? You are making this far more complex ...

Plot a line between 2 points and extend the line a determined distance

Why do you need filline, or anything like it? And why are you worrying about angles, etc.? You are making this far more complex ...

24 days ago | 0

| accepted

Answered

How do I solve over determined system of non linear equation?

Why do people think they need to use syms, just because they don't know the value of a result? (I think that somehow comes from ...

How do I solve over determined system of non linear equation?

Why do people think they need to use syms, just because they don't know the value of a result? (I think that somehow comes from ...

24 days ago | 1

| accepted

Answered

Speed up a procedure that uses ACCUMARRAY and UNIQUE functions

But how much more than 255? You keep being almost evasive in answering questions. For example, this would work, IF the elemen...

Speed up a procedure that uses ACCUMARRAY and UNIQUE functions

But how much more than 255? You keep being almost evasive in answering questions. For example, this would work, IF the elemen...

24 days ago | 0

Answered

Issue with simpsons rule

What do you mean about "estimating f"? Simpson's rule has absolutely no purpose in estimating a function, merely an integral. ...

Issue with simpsons rule

What do you mean about "estimating f"? Simpson's rule has absolutely no purpose in estimating a function, merely an integral. ...

25 days ago | 0

| accepted

Answered

Find unknown from the equation with given values

b=a-1; WTP? Since your real problem is apparently more complex than grade school mathematics, use solve. syms a b ...

Find unknown from the equation with given values

b=a-1; WTP? Since your real problem is apparently more complex than grade school mathematics, use solve. syms a b ...

25 days ago | 0

Answered

i want to solve definite integral with variable limits . can i apply trapezoidal rule for the same?

Can you generate a set of values for t between t0 and t1? Yes. Use linspace. Can you evaluate that function at those points? ...

i want to solve definite integral with variable limits . can i apply trapezoidal rule for the same?

Can you generate a set of values for t between t0 and t1? Yes. Use linspace. Can you evaluate that function at those points? ...

26 days ago | 0

| accepted

Answered

Force a linsolve solution

NO. You cannot force linsolve to return the solution you wish to see for a non-invertible matrix. At least not without doing som...

Force a linsolve solution

NO. You cannot force linsolve to return the solution you wish to see for a non-invertible matrix. At least not without doing som...

27 days ago | 1

| accepted

Answered

Hi. Could you give me some advice on how to import some txt data in MAtlab and perform FFT on the data?

Read this to learn to format code. Then apply it to your data, so it will appear as you want it. <https://www.mathworks.com/m...

Hi. Could you give me some advice on how to import some txt data in MAtlab and perform FFT on the data?

Read this to learn to format code. Then apply it to your data, so it will appear as you want it. <https://www.mathworks.com/m...

27 days ago | 1

| accepted

Answered

How to find different coordinates from an array that satisfies the equation of circle?

This: A = [1:100; 1:100] does NOT generate combinations of those values in a grid. a = 2;b=2;r = 2; [A,B] = mesh...

How to find different coordinates from an array that satisfies the equation of circle?

This: A = [1:100; 1:100] does NOT generate combinations of those values in a grid. a = 2;b=2;r = 2; [A,B] = mesh...

28 days ago | 0

Answered

non uniform thickness calculations

This will be true whenever you have two nonlinear relationships, describing the upper and lower envelopes. Even if you have two ...

non uniform thickness calculations

This will be true whenever you have two nonlinear relationships, describing the upper and lower envelopes. Even if you have two ...

28 days ago | 0

Answered

How to find the highest common dominator of two freqiencies? (2 equations with 3 unknowns)

You want to solve for x, such that x is as large as possible, AND it satisfies 195310 / x == y 16e6 / x == z where bo...

How to find the highest common dominator of two freqiencies? (2 equations with 3 unknowns)

You want to solve for x, such that x is as large as possible, AND it satisfies 195310 / x == y 16e6 / x == z where bo...

28 days ago | 1