Resuelto


Test if a matrix is symmetric
Write a logical function that returns 1 if the input matrix is symmetric and 0 otherwise.

alrededor de 11 años hace

Respondida
How to do this: Multivariate Interpolation with random data (non-gridded)
vq = griddata(x1,x2,y,x10,x20) hth, George Papazafeiropoulos

más de 11 años hace | 0

Respondida
how to write the nonlinear constraints in fmincon
Define the constraint function as follows: function [C,Ceq]=confun(x) F1=... F2=... F3=... F4=... F5=... ...

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Respondida
I have n points (x ,y coordinates known) of two parallel lines (not perfect straight ) want to draw lines from first boundary points to second boundary with proper slope . Also want to find min & max distance between the lines.
BOUN1=[ 191 220 189 221 188 222 186 223 186 224 185 225 185 226 185 227 185 228 186 229 187 230 187 231 187 232 187 233 187 23...

más de 11 años hace | 0

Respondida
How to solve linear and non linear equation system?
For 14 equations with 14 unknowns, try fsolve, or any other iterative solver (Newton-Raphson, Arc-Length, line search, etc...) ...

más de 11 años hace | 0

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Respondida
Defining a function (including vector dot product) for all the points in 3D
% data dx = 0.1; dy = 0.5; dz = 0.1; [x, y, z] = meshgrid( (1:100)*dx, (1:100)*dy, (1:100)*dz ); X = [x(:) y(:)...

más de 11 años hace | 0

Respondida
Remove NaN from a matrix
ind=sum(~isnan(B)); B(isnan(B))=0; mean=sum(B)./ind

más de 11 años hace | 2

Respondida
find min or max value element from more than two matrices
% data matrix1=rand(2); matrix2=rand(3); matrix3=rand(4); % engine c=nan(4,4,3); c(1:2,1:2,1)=matrix1; c(...

más de 11 años hace | 1

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Respondida
How to get the output to a variable
Try this after running your code: fit1.Constant fit1.GARCH{1} fit1.ARCH{1} fit1.Offset

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Respondida
how to select higher value in a matrix and change that by introducing an error?
Are you looking for something like this? a= [ 0.83 0.85 0.97 0.1 0.95 0.93 0.2; 0.2 0.12 0.12 0.76 0.77 0.78 0.25; ...

más de 11 años hace | 1

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Respondida
i want to save all the value of variable a from all iterations into a single matrix ?
% initial data f=[1 3 5 7 9 11; 2 4 6 8 10 12]; b=[1 2;3 4]; % engine b=b'; [nn,n]=size(f); [m,c]=size(b...

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Respondida
Draw a line on a 2D plot at a particular x and y values
x=linspace(0,4); y=x.^2; plot(x,y); line([3;3],[0;9],'linestyle','--'); line([0;3],[9;9],'linestyle','--');

más de 11 años hace | 2

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Resuelto


Numbers spiral diagonals (Part 1)
Inspired by Project Euler n°28 et 58. A n x n spiral matrix is obtained by starting with the number 1 and moving to the right...

más de 11 años hace

Respondida
how to make vector sum to one?
W'*ones(N,1)=1

más de 11 años hace | 2

Respondida
how to use multiple linear equality constraints
Convert them into matrix form and look about the input arguments Aeq and Beq in the documentation of fmincon.

más de 11 años hace | 1

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Extend a vector by extending its elements
If X is a column vector: % initial data d=10; % engine X=(1:d)'; ind=ones(d^2,1); ind(d+1:d:d^2)=1-d; % r...

más de 11 años hace | 0

Respondida
How to detect if a line intersects with itself?
% initial data A = [1 1; 1 2; 2 2; 2 1; 3 1]; tour_order = [2; 1; 4; 3; 5; 2]; % engine sizeA=size(A,1); meanA=...

más de 11 años hace | 0

Respondida
Testing for an Integer and displaying that value.
% initial data ll=99; ul=500; f=5; % engine lb=floor(ll/f); if lb/2~=floor(lb/2) lb=lb+1; end r...

más de 11 años hace | 0

Respondida
Reduce dimensionality using indices
This is an alternative solution which does not contain external functions, thanks to Jos! % initial data A=ceil(10*rand(...

más de 11 años hace | 1

Respondida
Reduce dimensionality using indices
After specifying A... d=[1 2 3; 1 1 3; 2 1 1]; B=zeros(3,3,3); B(:,:,1)=(d==1); B(:,:,2)=2*(d==2); ...

más de 11 años hace | 0

Respondida
Multiple linear regression nonlinear constraints with fmincon
As an example for doing this, I give you an example. Define a function as follows: function er = objfun(a) global y x ...

más de 11 años hace | 0

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Respondida
Help me about the error with symsum function to calculate the sum of series ?
Maybe because there is not any analytical formula which gives this sum. Can this function be integrated in an analytic way? I su...

más de 11 años hace | 0

Respondida
Matlab problem: How to calculate a rough, approximate, derivative vector by using the following formula?
x=-10:10; y=x.^2; Yprimenum=diff(y)./diff(x)

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Respondida
Making each element of a row vector equal to zero
You can create a new vector with all zeros by typing the command: new=zeros(1,100) or by using a for loop: for I=1:...

más de 11 años hace | 0

Respondida
detect consecutive duplicates in a structure
A(1).a=1 A(2).a=1 A(3).a=3 A(1).b=true A(2).b=true A(3).b=false for ii=2:3 ttest(ii-1)=A(ii).a==A...

más de 11 años hace | 0

Respondida
Different length array comparison and replacements
% data A=[445; 874]; B= [265; 446; 744; 872; 875]; % engine AA=A(:,ones(1,size(...

más de 11 años hace | 0

Respondida
Extra term in "min" function in while loop
The extra ,DC1(1,j) bit is the next command. You can erase the initial comma and press enter to get it in the next lin...

más de 11 años hace | 1

Respondida
Finding x & y-values that maximize an expression!!!!
The expression for J does not have any maxima. This can be seen easily by geometric interpretation of the formula. J can be mini...

más de 11 años hace | 0

Respondida
fft normalization and parseval
In the following code: var1=128; h=complex(randi([-1 1],var1,1),randi([-1 1],var1,1)); h=h/std(h); % no h is normaliz...

más de 11 años hace | 0

Respondida
HOW TO ACCESS THE FOLLOWING ELEMENTS FROM THE GIVEN ARRAY
a=[ 0 0 0.3013 1.1305; 1.0000 2.0000 0.7390 0.4223; 3.0000 2.0000 1.1305 ...

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