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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 前 | 0

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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 前 | 0

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已回答
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 前 | 0

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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 前 | 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 前 | 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 前 | 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 前 | 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 前 | 0

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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 前 | 0

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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 前 | 0

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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 前 | 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 前 | 0

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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 前 | 0

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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 前 | 0

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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 前 | 3

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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 前 | 1

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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 前 | 0

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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 前 | 0

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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 前 | 1

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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 前 | 0

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

10 years 前 | 0

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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 前 | 1

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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 前 | 0

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已回答
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 前 | 1

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已回答
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 前 | 0

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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 前 | 0

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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 前 | 0

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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 前 | 0

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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 前 | 0

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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 前 | 0

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