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How to I find x in sin(x) = 0.65
Simple enough. I'll use solve, since you mentioned that. What happens if you just call solve? syms x solve(sin(x) == 0.5) So ...

mehr als 4 Jahre vor | 1

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How do I create this full diagonal matrix
What are you doing with the matrix x, once you create a matrix with the diagonal in question? Does MATLAB know what you are doin...

mehr als 4 Jahre vor | 0

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Polynomial surface fitting problem with constraint y <=1
You have the model: y = a*x1^b + c*x2^d I'll assume that x1 is temperature, and x2 is current discharged. You have told u...

mehr als 4 Jahre vor | 1

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Is it posible to solve system of differential equations with piecewise function inside?
Well, actually, yes you can solve the problem using a numerical ODE solver. That is trivial. For example, consider the simple pr...

mehr als 4 Jahre vor | 0

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how to get common range for several intervals
Please stop asking the same question over and over again. Finding the sub-interval that covers the maximum number of intervals...

mehr als 4 Jahre vor | 1

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A set of data has two large intervals, can it be divided into two sets of data? Thanks for your answer.
Are you asking how to divide this into two separate curves, the upper half, and the lower half? I can only assume that is your g...

mehr als 4 Jahre vor | 1

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Writing a script for Goldbach's Conjecture
Let me suggest you are starting from the wrong end? Instead, start with all primes less than your target maximum, so 1000. Can ...

mehr als 4 Jahre vor | 0

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who does logical works
When something is too big or complicated, TAKE IT APART. TRY IT. x= [ 2 3 4 8 10 0 -2] So x is a vector of integers. What doe...

mehr als 4 Jahre vor | 1

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CRT gamut solid
Not totally pertinent, but years ago, I built a solid model of some gamuts. I no longer have it, since I gave it away when I ret...

mehr als 4 Jahre vor | 1

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Backslash for inverse to solve Ax=B
When you have a singular system, then pinv and backslash will both attempt to solve the problem, to the extent they can. I seri...

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how do i write commands for errors and warnings in Matlab
You wrote code for an ERROR message. If you don't know if it is correct, then TRY IT! Does it do as requested? An error termina...

mehr als 4 Jahre vor | 1

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How to get the expression of a 3d surface
Congratulations! You are the one millionth person to ask this same question. Your reward for this is a one way, unpaid trip to N...

mehr als 4 Jahre vor | 0

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Failure in initial objective function evaluation. FMINCON cannot continue.
You need to read the examples. Look at the help for fmincon. Why? What is nvars? nvars = 2; nvars is the scalar 2. I assume y...

mehr als 4 Jahre vor | 0

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Alternating forward and reversed cos function
This may be easier than you think. But since you asked, and had no idea how to do it, it may be harder than you think. DRAT. Now...

mehr als 4 Jahre vor | 0

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How to calculate R^2 based on external linear equation?
Unfortunately, R^2 is not a completely simple concept when working with an orthogonal regression. To compute a valid R^2, we nee...

mehr als 4 Jahre vor | 4

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How can i graph these equations?
None of the solutions you tried are correct, because they try to treat these functions as single valued relations. That is not t...

mehr als 4 Jahre vor | 0

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Count number of digits after decimal point?
MATLAB does not distinguish between numbers with trailing zeros after the decimal point. That is, 0.25 == 0.250 == 0.250000000. ...

mehr als 4 Jahre vor | 1

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Factoring out a smaller equation, using symbolic math, from a larger equation
You were using collect in the wrong way. You were thinking in terms of what you wanted to see INSIDE the parens. Instead, you ne...

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How can I set bounds for ga that change with the values of the optimization variables?
You cannot. Bounds are FIXED constants. They do not vary at all, and the optimizer assumes that as fact. If you have a constrai...

mehr als 4 Jahre vor | 1

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What do I do to upgrade from MatLab 2013a to run-on MacOS Catalina
What can you do now? Looking at the system requirements page, we see that R2019b is the oldest release supported for Mac OS 10....

mehr als 4 Jahre vor | 0

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how to get convolution for two signals without using conv command
Several ways you could do this. If your signal is represented as a discrete sequence, then just use a double loop, accumulating ...

mehr als 4 Jahre vor | 0

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Countering error while using interp1 function
Your problem is NOT in interp1. It is in the incorrect use of datetime. Read the error message: Error using datetime (line 597)...

mehr als 4 Jahre vor | 2

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Does Matlab have a way to find the formula that defines a sequence?
Things are never as easy as you think. For example, is there a simple difference relation that will generate this sequence: P =...

mehr als 4 Jahre vor | 2

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Comparison of very large numbers
@Steven Lord said it exactly correct. The problem is not that a tool like ismember rounds anything, nor that ismembertol would h...

mehr als 4 Jahre vor | 0

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How to convert BigInteger into binary?
You would not expect dec2bin to do it, when you convert the number oto a double. It will fail above 2^53-1, and that number is s...

mehr als 4 Jahre vor | 1

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Matrix in matlab equation
An alternative to repmat is to use a dot product (if you are an old APL person like me, then the phrase "outer product" will com...

mehr als 4 Jahre vor | 0

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How to get more than 1 ans
The thing to remember with functions that return more than one argument is what MATLAB does with those arguments. Consider any f...

mehr als 4 Jahre vor | 0

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Create a double identity matrix matlab
There are many basic ways, some not so basic. Perhaps my favorite is just: n = 8; A = triu(tril(ones(n)),-1) Here is another ...

mehr als 4 Jahre vor | 2

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How to find the coefficient matrix of a set of nonlinear equations?
This is a linear problem, IF you recognize that each of the right hand sides are linear in a,b,c,d except for the cube around th...

mehr als 4 Jahre vor | 1

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Difference in exp(a*b) and (exp(a))^b when b is a fraction and a is a complex number
They look like they should be the same, yes. But sometimes your intuition about what is mathematically correct leads you astray ...

mehr als 4 Jahre vor | 3

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