Answered
Eliminate zero and negative roots by Embedded Matlab Function
The input u is fixed-size, so it is impossible to delete elements from it. Instead, copy it to a variable-size array and then d...

10 years ago | 0

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Integrating indefinite integrals without Symbolic
First of all, when working with indefinite integrals numerically, we will need to fix the constant of integration. This is usua...

10 years ago | 1

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Answered
How to generate C code for both .m file and simulink?
It's hard to remember what all was supported in 2008b, and I'm also not a Simulink expert. What does your MATLAB script really ...

10 years ago | 0

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Use nargin/nargout on generated mex Functions
Not sure why this question slipped through unnoticed. I've created an enhancement request to make nargin and nargout work when ...

10 years ago | 0

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Z must be a matrix, not a scalar or vector
It's telling you that the variable "sol" is a vector, whereas X and Y are matrices. If you want to plot a set of points on a sur...

10 years ago | 0

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MATLAB Coder and Intel C++ Compiler
The "for all features" is just what gets put into the table when there isn't any distinction made. It means that support is "al...

10 years ago | 0

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Answered
Use quadgk with multiple Inputs with Matlab Coder
I don't have a lot of time to type this. Hopefully if it isn't clear I can come back and add some detail. The way we normall...

11 years ago | 2

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how to decrease the tolerence or accuracy of my results
Youseff, I did not try to read your code, but I see integral2() in there, and you mention not knowing how to use reltol and abst...

11 years ago | 0

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How can I evaluate a Double Integral with an additional variable dependent integral contained inside using dblquad?
I forget DBLQUAD's arcane requirements on the input sizes. If memory serves, the integrand has to work when one is a vector and...

11 years ago | 0

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Numerical integration in a loop
Is this what you mean? omega_11 = pi; % or whatever t = 0:0.01:5; Q = zeros(size(t)); % Preallocate Q for the sake of...

11 years ago | 0

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Is any way in Matlab to perform definite integral with conditions in the integration domain?
I'm not sure I understand your clarification correctly. Here is my best guess >> f = @(x)(x.^2+3*x).*(x <= 100) + x.^3.*(x...

11 years ago | 1

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How to evaluate this integral in Matlab?
Sorry I missed this question back in October. It is not easy to do these problems because one has to keep track of what works w...

11 years ago | 0

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how to clear variables in code generation ?
What problem are you trying to solve by clearing variables? Have you verified that it is still a problem with code generation? ...

11 years ago | 0

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Integration of function with two variables with respect to one of them
Here's an example. While it's _literally_ true that you can't do numerical integration with free variables, sometimes it misses...

11 years ago | 0

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How to solve a threedimensional integral of a nested function?
The devil here must be in the details. The example you give is easy enough >> g = @(x,y,z) x.*y.*2.*z; >> f = @(x,y,z) ...

11 years ago | 1

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Answered
How do I numerical integrate polynomial coefficients to a high order?
Suppose p is a polynomial in MATLAB (a vector of coefficients). Multiplying by x^2 and integrating could be done by Q = i...

11 years ago | 0

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Numeric integration of a matrix using integral2()
This is an advanced exercise for using integral2. I _think_ this does what you wanted. The approach is to work with all scalar...

11 years ago | 0

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numerical integraion with array limits
Assuming you want each individual integral to be integral(@(x)lognpdf(b(j)-x,2,1),a(j),b(j)) then Qab = @(aj,bj)in...

11 years ago | 0

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Answered
How to compute Double Integral of highly oscillating function?
So I assume you saw this: >> a = 10; >> f = @(x,y)sin(a*(x-y)) f = @(x,y)sin(a*(x-y)) >> integral2(f,0,10...

11 years ago | 1

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Trouble when using dblquad for product of functions
Your integrand function is not defined to be symmetric. We have dtemp(1,2) = dblquad('integrand',(0+(m)*h),(0+(m+1)*h),(0+...

11 years ago | 0

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Answered
How can i know the size of the rectangles in a numerical integration?
All the INTEGRAL and QUAD* functions are adaptive quadrature routines. INTEGRAL2 with the 'tiled' method transforms the integra...

11 years ago | 0

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finding a number that satisfies given conditions
Integrals? Not sure about that. A random search will finish faster. There are LOTS. You can use LINSPACE to generate evenly s...

11 years ago | 1

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Declaring const variable in generated code
This is a common request in one form or another. A common variant is that people would like to have numeric constants #defined ...

11 years ago | 1

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How can I concatenate matrices in an embedded matlab function block in simulink?
Kaustubha's comment is the answer to this question. Use coder.varsize to give s.a the variable-size properties that you need. ...

11 years ago | 1

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Not getting the same answer between Matlab and Simulink
Considering complexity of the operation, those are the same answers. All meaningful requirements on floating point numbers are ...

11 years ago | 1

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Row/Col major order in mex function
I have written numerical library routines for the better part of the last 25 years, and it didn't take me very long to realize t...

11 years ago | 3

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Coder: Exclude/ignore code sections?
You can wrap them with if coder.target('MATLAB') ... end Or if that gives an error, if isempty(coder.target) ...

11 years ago | 6

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Answered
How to use an integral inside another integral
Either this (find_integral is unchanged) function [answer]=find_integral2(z) F=@(y) arrayfun(@(y)find_integral(z-y).*fin...

11 years ago | 1

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Numerical volume integral with keeping parameters
Well, for starters, you need to change / to ./ in the definition of f. Second, however, you will need to use integral3 instead ...

11 years ago | 0

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How can I calculate the Chi-Squared CDF if I use MATLAB C-Coder?
This function is now supported for code generation in R2013b.

11 years ago | 1