Answered
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...

10 years ago | 0

Answered
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)

10 years ago | 0

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Answered
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:...

10 years ago | 0

Answered
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...

10 years ago | 0

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

10 years ago | 0

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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...

10 years ago | 1

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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...

10 years ago | 0

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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...

10 years ago | 0

Answered
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 ...

10 years ago | 0

Answered
Regarding Genetic Algorithm Optimization- How to stop GA tool after each generation
t=0.2; % or any other reasonable time value while exist('filename.extension','file')==2 pause(t) end

10 years ago | 0

Answered
problem with if test to test the increment in time
T = 1e-4; h = T/100; n = 1000;%par exemple Ts = 0:T:n*T; j = 1; for t =0:h:n*T if ismembc(t,Ts) ...

10 years ago | 0

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interpolate data points problem
At least one entry in Y is NaN (Not-A-Number). To find it, type in the command window: find(isnan(Y)) You should check ...

10 years ago | 0

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Answered
How to reduce execution time? "If" and "ismember" functions
To make ismember function faster, replace it with either *ismembc* or *ismembc2* functions. *ismembc* returns an array of logica...

10 years ago | 0

Answered
How to find the indices of element occuring once in a vector?
A=[1 1 -1 0 0 0 1 0 1 1]; [~,c]=histc(A,unique(A)); out=find(c==1);

10 years ago | 0

Answered
How to find the indices of element occuring once in a vector?
A=[1 1 0 -1 0 0 1 0 1 1]; [~,c]=histc(A,unique(A)); out=A(c==1);

10 years ago | 3

Answered
code of euler's method
A simple application of Euler method: Define the function: function E=euler(f,a,b,ya,M) h=(b-a)/M; Y=zeros(1,M+1);...

10 years ago | 1

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Answered
To sum functions which have two unknowns and finding the min values of these unknowns
See if this works: F=zeros(200,1); xy=zeros(200,2); BS=rand(4,2); r=rand(200); for ti=1:200 for m=1:4 ...

10 years ago | 0

Answered
How to generate a total random 6 by 6 Latin Square?
Look at the following: http://www.mathworks.com/matlabcentral/fileexchange/12315-latsq/content/latsq.m Hope this helps!

10 years ago | 0

Answered
How to make an anonymous function whose variable is itself a function of another variable?
z = @(phi) cos(phi).^2 + 4*sin(phi).^2 phi = @(x) x.^3 + 4*x.^2 + x +3 z(phi(3))

10 years ago | 1

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Answered
how to make output a for loop subtract sequentially a data set below it to give sum of differences
Do you want this: b=2; c=1; d=1; n=4; Y=b*c*d*n; X = [10 13 15 12 17 23 26 19]; f = [1 4 8 10 12 16 18 20];...

10 years ago | 0

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Answered
Breaking a function into components?
Make a function named myfunc as follows: %---------------------- function out=myfunc(a,vec) out=a.*vec; end %----...

10 years ago | 0

Answered
How to generate an array alternating the values of two others?
A = [1 2 3 4 5 6]; B = [10 20 30 40 50 60 70 80 90 100 110 120 130 140 150]; M1=[A,A,A(1:3)]; M2=B; M=[M1;M2]; Se...

10 years ago | 1

Answered
fminunc stopped because it exceeded the function evaluation limit, options.MaxFunEvals = 100 (the default value).
Define the objective function by setting its output with the opposite sign as follows: function F=fun(x) F=-0.2662*x.^6+...

10 years ago | 0

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Answered
hi am working on a code for gaussian elimination
The correct function is: function [x,U]=gausselim(A,b) % function to perform gauss eliminination %FORWARD ELI...

10 years ago | 1

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Answered
How can I solve system of the matrix differential equation within MATLAB?
eqn = 'D2y - A*Dy - B*y = C'; inits2 = 'y(0)=a, Dy(0)=b'; y=dsolve(eqn,inits2,'x') where a and b are the initial or bou...

10 years ago | 0

Answered
trying to delete 2 cells of Nans, NOT To delete the row
At least one of the values of JT_S_TN([13,14,15,34,35,36,55,56,57,76,77,78],2) must be equal to 2 and at least one of the ...

10 years ago | 0

Answered
matlab sovle newton raphson method
Look for the following Newton-Raphson solver in the File Exchange: http://www.mathworks.com/matlabcentral/fileexchange/44315-...

10 years ago | 0

Answered
simpsons rule in matlab
a= Initial point of integration interval b= Last point of integration interval n= number of sub-intervals (panels) of in...

10 years ago | 0

Answered
a problem with for loop and indexinf
A={Array_1;Array_2;Array_3;Array_4;Array_5;Array_6;Array_7;Array_8;Array_9;Array_10}; for k=1:10 AR{k}=exp(A{k})+A{k...

10 years ago | 0

Answered
delete a NAN but leave a zero instead to be later taken out
A=[NaN 0; 1 3; 1 3; 1 3; 2 4; 2 4; 2 4; 3 1; 3 1; 3 1; 4 2; 4 2; 4 2; NaN 0; 5 4]; sizA=size(A,1); A=A(:); ...

10 years ago | 0

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