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operator '*' is not supported for operands of type 'function_handle'.
This question (or the equivalent) gets asked over and over again. I can understand where things get confusing. For example: f =...

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Why does MATLAB (Symbolic Math Toolbox) not integrate this simple function.
Your problem is, you need to define a properly. So, if you do only this: syms x a I = int((1-x^2/a^2)^(3/2),x) Now you see th...

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How to generate a matrix with random numbers between 0 and 1 and mean of the distribution is unspecified.
You need to understand the difference between a sample mean, and the population mean. x = rand(1,100); mean(x) This is a rand...

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fmincon solution different for different start values
There are many scenarios where a solver can produce different solutions for different start values. First, know that fmincon is ...

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Spline vs Linear Interpolation
This is not remotely a question about MATLAB. I'll answer it only because I have some time, and because I do understand interpol...

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Quadratic spline having shape preserving property
You cannot define a shape preserving quadratic spline that is differentiable across the breaks. So while you think you want it,...

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How to optimize the solution of one optimization function using another?
Why do you think this has any remote reason to converge? Consider this trivial example of a pair of problems, based exactly on t...

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reading the numbers resulting from the loop
Why would it mean anything else? That is, what is the product of the numbers 10^4*2.2567? 10^4* 2.2567

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What to do when solving a system with a sparse matrix and a dense matrix results in a singular matrix, even after normalization?
Normalizing the matrix in some way will not help. In fact, it might invalidate the FEM solution, depending on what you did. Sinc...

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Plot figure for f(y,z)=0
Simple enough. Define the two functions. Then subtract them, and plot using fimplicit. f = @(z) 0.07*z.^2./(0.09 + z.^2); g = ...

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Formulate an objective function with summation terms to solve a linear programming problem
Why would you need fmincon on a purely linear problem? u and v may be different vectors in your eyes, but they can trivially b...

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Solve differential equation from Matlab
Making various assumptions, we see the solution as: syms ka kd C xmax syms x(t) dsolve(diff(x) == (ka*C*(xmax-x)-kd*x)/(1+ka*...

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Obtaining the combinations of a vector array to satisfy lineal constrains.
Is it possible? Of course. Exhaustive enumeration. Just try all combinations, saving those that work. Is that easy? OF COURSE NO...

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Random number generation with min, max and mean
Sigh. I've probably seen different variations of this question asked at least many hundreds of times over the 40+ years I have b...

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fit tool with errors in x and y
You can't. Period. You cannot use fit to solve a problem with errors in both x and y. That does not say the problam is never sol...

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roots(x) vs root= interp1(y,x,0)
You need to understand the mathematics. Lost you will be without that (to misquote someone named Yoda.) For this polynomial: s...

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How to create random matrix with specified step in interval [a, b]
You can also use indexing. The idea is to generate random indexes. ValidRandomSet = 5:3:34 m = 7; n = 6; ind = randi(numel(V...

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Interpolate using a different method without the original image
Um, no, or, yes. Anyway, you cannot do it directly. And it may be completely impossible to do. All of that depends on several th...

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How to find the volume of cross-sectional area of a cylinder
Is there a ready made function that will do the mathematics for you, based only on an inequality? No. You will need to do some m...

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Error solving bvp4c - Singular jacobian
You have a simple classical ODE, with two INITIAL conditions, not boundary conditions at different ends. So use a tool like ODE4...

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noisy plot after calculating first derivative
You should recognize that differentiation is a noise amplification operator. So any small amounts of noise in your signal, even ...

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fminsearch with side conditions
Generally, the solution is to not use fminsearch. Use a better optimizer instead. It will be faster, and you will get a better a...

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Obtaining value of highest order derivative over simulation period
Can you use schemes like ODE45, combined with gradient to compute exact estimates of the high order derivatives? Sadly, no. High...

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Acceleration at the center of the triangle
If you have some known parameter at the three corners of a triangle, then the best estimator of that parameter at the center of ...

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How to use bitn
You cannot define a scalar variable as a binary one with an arbitrary number of bits. You can define integer variables, with a s...

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Why I'm getting error (too many arguments) in my integral
You need to pay MUCH more attention to your code. For example, just a quick look shows this: Intdoble6=int(int(2*y^2,x,0,1)4*x...

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I nee to write a code to solve a definite integral. The output format has to be fprintf.
Do you understand that MATLAB REQUIRES a multiplication operator? You cannot just put a number next to a letter, and expect MATL...

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Maximum Likelihood Estimation function
Is there another way? Why not negate the function, and then use a tool like fminbnd? Or fminsearch. Or fmincon or fminunc, or .....

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What optimizer should I use?
This is not a problem of finding an optimizer. This is a problem of understanding how to formulate a problem so that it is possi...

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simulation stopped because of step size tolerance and constraints
Let me see. You posed an optimization problem. The solver returned a result, one that SATISFIES the tolerances you posed. You we...

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