Answered

How to make Triu in reverse axis for triangular matrices ?

Are you asking to do no more than this? A = magic(6) A = flip(tril(flip(A))) That is a simple way to do it. There would be ot...

How to make Triu in reverse axis for triangular matrices ?

Are you asking to do no more than this? A = magic(6) A = flip(tril(flip(A))) That is a simple way to do it. There would be ot...

alrededor de 17 horas ago | 0

| accepted

Answered

Zone identification on curve

Should a function automatically identify a staircase function? No. That can be quite difficult, especially if your staircase is,...

Zone identification on curve

Should a function automatically identify a staircase function? No. That can be quite difficult, especially if your staircase is,...

2 días ago | 1

Answered

How can I put the outputs of for loop into a matrix?

First, don't use loops at all. For example, with n==3... n = 3; ind = 1:n; a = ind.'*5/n + ind*8/n Since this is probably ho...

How can I put the outputs of for loop into a matrix?

First, don't use loops at all. For example, with n==3... n = 3; ind = 1:n; a = ind.'*5/n + ind*8/n Since this is probably ho...

3 días ago | 0

| accepted

Answered

Why is it that Matlab has so many data types?

So? If you don't need them, then something you don't use has no impact on you. MATLAB is a complex, powerful language, that can ...

Why is it that Matlab has so many data types?

So? If you don't need them, then something you don't use has no impact on you. MATLAB is a complex, powerful language, that can ...

3 días ago | 0

| accepted

Answered

Some difference between MatLab and VS calculation

Which is more correct? Neither is correct in the bolded digits you post. In fact, the digit preceding that is also incorrect, in...

Some difference between MatLab and VS calculation

Which is more correct? Neither is correct in the bolded digits you post. In fact, the digit preceding that is also incorrect, in...

3 días ago | 0

| accepted

Answered

how to plot verticle lines?

Plot two points, connected by a line. Both points will have the same value for x. You can choose the start and end point in y to...

how to plot verticle lines?

Plot two points, connected by a line. Both points will have the same value for x. You can choose the start and end point in y to...

3 días ago | 0

| accepted

Answered

Finding min and max of an element without using builtin function

You are missing the point here. This is an exercise. The intent is for you to find a solution that does not use max or min. Doe...

Finding min and max of an element without using builtin function

You are missing the point here. This is an exercise. The intent is for you to find a solution that does not use max or min. Doe...

3 días ago | 1

Answered

3D Printer Costs

Honestly, this is something more easily written using a spreadsheet. They are perfect for such an application. Fill out the hal...

3D Printer Costs

Honestly, this is something more easily written using a spreadsheet. They are perfect for such an application. Fill out the hal...

3 días ago | 0

| accepted

Answered

The fix(x) command does not work

Fix does work. You need to understand what you asked it to do. A = [4 3 2 1;2 5 6 2;0 0 1 3;-1 -2 9 8]; format long g B = inv...

The fix(x) command does not work

Fix does work. You need to understand what you asked it to do. A = [4 3 2 1;2 5 6 2;0 0 1 3;-1 -2 9 8]; format long g B = inv...

4 días ago | 0

| accepted

Answered

Solve: Unable to find explicit solution.

I spent 20 minutes writing a detailed answer to your question, only to find you appeared to have deleted the question. Now it is...

Solve: Unable to find explicit solution.

I spent 20 minutes writing a detailed answer to your question, only to find you appeared to have deleted the question. Now it is...

4 días ago | 0

| accepted

Answered

I'm trying to plot this equation, if anyone can help

If no value is supplied for a, then what will you plot? Perhaps you might do this: a = 0.25:0.25:2; L = cell(size(a)); for i...

I'm trying to plot this equation, if anyone can help

If no value is supplied for a, then what will you plot? Perhaps you might do this: a = 0.25:0.25:2; L = cell(size(a)); for i...

4 días ago | 0

Answered

How to hinder ongoing spamming II?

I've been deleting the posts as I see them. First, get any new account ids, so I can send that info to our admin, so he can di...

How to hinder ongoing spamming II?

I've been deleting the posts as I see them. First, get any new account ids, so I can send that info to our admin, so he can di...

4 días ago | 0

Answered

lsqcurvefit bad fitting results

Honestly, I would NOT solve it like that. Not even remotely so. Using lsqcurvefit for this just seems fraught with problems. Wh...

lsqcurvefit bad fitting results

Honestly, I would NOT solve it like that. Not even remotely so. Using lsqcurvefit for this just seems fraught with problems. Wh...

4 días ago | 0

Answered

understanding and converting two matlab function to c++/c code

You could read the documentation for thse functions. In there, you will find a complete explanation of what those codes do. The ...

understanding and converting two matlab function to c++/c code

You could read the documentation for thse functions. In there, you will find a complete explanation of what those codes do. The ...

4 días ago | 0

Answered

User defined FFT function parameter not recognized

How did you call the function? When you get an error, report the ENTIRE error message, everyting in red. This lets us know how y...

User defined FFT function parameter not recognized

How did you call the function? When you get an error, report the ENTIRE error message, everyting in red. This lets us know how y...

4 días ago | 1

Answered

What is the difference between Double 1.0000 and Double 1 ?

If you see the number in MATLAB displayyed as 1.000 in the command window, then almost always you don't have the number 1. Inste...

What is the difference between Double 1.0000 and Double 1 ?

If you see the number in MATLAB displayyed as 1.000 in the command window, then almost always you don't have the number 1. Inste...

4 días ago | 0

Answered

How to fit this signal to x axis at y=0 using polyfit/polyval?

This is just another case of someone not understanding how polynomials work or behave. Seriously, to fit a polynomial to that d...

How to fit this signal to x axis at y=0 using polyfit/polyval?

This is just another case of someone not understanding how polynomials work or behave. Seriously, to fit a polynomial to that d...

4 días ago | 0

Answered

How can I fit an exponential curve?

x = [35.668 34.448 33.317 30.357 27.598]; y = [180 504 1260 10300 80900]; plot(x,y,'o-') First, recognize you have only 5 ...

How can I fit an exponential curve?

x = [35.668 34.448 33.317 30.357 27.598]; y = [180 504 1260 10300 80900]; plot(x,y,'o-') First, recognize you have only 5 ...

5 días ago | 0

| accepted

Answered

Calculation of two less than equal

You want to solve for a scalar m such that the inequalities are always true? Regardless, does a solution ever exist? Note that u...

Calculation of two less than equal

You want to solve for a scalar m such that the inequalities are always true? Regardless, does a solution ever exist? Note that u...

5 días ago | 1

Answered

i am new. i need help. kindly answer.

If this is homework? It very possibly is, because there are relatively few good reasons I can think of to solve any integration ...

i am new. i need help. kindly answer.

If this is homework? It very possibly is, because there are relatively few good reasons I can think of to solve any integration ...

5 días ago | 2

Answered

Euler's Method and exact solution plot

Sorry, but your code is wrong (so is your exact solution.) Why? Look at what you wrote. h=0.05; % time step t=...

Euler's Method and exact solution plot

Sorry, but your code is wrong (so is your exact solution.) Why? Look at what you wrote. h=0.05; % time step t=...

7 días ago | 1

| accepted

Answered

MATLAB cannot integrate trigonometry in the form of degree

I think you do not understand integration, IF your expectation really is the two should be the same. That is, you think the inte...

MATLAB cannot integrate trigonometry in the form of degree

I think you do not understand integration, IF your expectation really is the two should be the same. That is, you think the inte...

7 días ago | 1

Answered

how to plot a function symbolically?

You have the relationship z(r) = H - C^2/(2*g*r^2) If H and C are not known, with g fixed at 9.8, then they make this in...

how to plot a function symbolically?

You have the relationship z(r) = H - C^2/(2*g*r^2) If H and C are not known, with g fixed at 9.8, then they make this in...

7 días ago | 0

Answered

Query regarding finding the index which will give 90% of the total area under the curve

No. You found some approximations of the area, using either trapz or polyarea. In both cases, they produced what is a trapezoida...

Query regarding finding the index which will give 90% of the total area under the curve

No. You found some approximations of the area, using either trapz or polyarea. In both cases, they produced what is a trapezoida...

7 días ago | 1

Answered

fit these curves and what type of fit they are?

Your data is noisy. There is NO specific function that describes the data. It is NOT truly linear. It is NOT truly exponential, ...

fit these curves and what type of fit they are?

Your data is noisy. There is NO specific function that describes the data. It is NOT truly linear. It is NOT truly exponential, ...

7 días ago | 0

| accepted

Answered

I want to set a range of variable to three or four places of decimals

Are you asking to create a variable that only carries 3 or 4 digits of precision? You can't choose to set an arbitrary precision...

I want to set a range of variable to three or four places of decimals

Are you asking to create a variable that only carries 3 or 4 digits of precision? You can't choose to set an arbitrary precision...

7 días ago | 0

| accepted

Answered

atan2 not consisent

What you don't understand is that just because MATLAB displays a number represented to 15 digits, does not mean it is EXACTLY th...

atan2 not consisent

What you don't understand is that just because MATLAB displays a number represented to 15 digits, does not mean it is EXACTLY th...

9 días ago | 0

Answered

Error using ==> asind Argument should be real.

So what is the problem? It seems the error message states exactly what happened, and why MATLAB sees a problem. Honestly, it ju...

Error using ==> asind Argument should be real.

So what is the problem? It seems the error message states exactly what happened, and why MATLAB sees a problem. Honestly, it ju...

9 días ago | 1

| accepted

Answered

how do I right x^2 in MATLAB

Is x a scalar? If so, then you write it as x^2. Is x a vector? Then, assuming you want to perform an element-wise squaring, yo...

how do I right x^2 in MATLAB

Is x a scalar? If so, then you write it as x^2. Is x a vector? Then, assuming you want to perform an element-wise squaring, yo...

10 días ago | 0

| accepted

Answered

4D Interpolation scattered Data

Sorry, but you cannot use tools like griddata or scatteredInterpolant to interpolate non-single valued relations. It seems all y...

4D Interpolation scattered Data

Sorry, but you cannot use tools like griddata or scatteredInterpolant to interpolate non-single valued relations. It seems all y...

10 días ago | 0