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Hi I have a basic doubt about the integrator block in simulink
Sreerag, the integral of sine is a negative cosine plus an integration constant. Integrating a sine between 0 and pi results in ...

12 years ago | 1

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i had matrix s of size 4*12540, i want to take power of this matrix raise to 4*12540,how should i do it?
Amina, I am not sure I can follow. In general, if you need to take the nth power simply use n = 3; s3 = s.^n; or s...

12 years ago | 1

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Find the negative entries in a array.
E, use [row col] = find(a<0)

12 years ago | 2

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Where or How can I access past editions of the Matlab Digest?
MathWorks only publishes the current MATLAB Digest. All technical articles that have appeared in Digests are live in the <http:...

12 years ago | 0

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Excluding specific elements from matrix index
Jonah, how about A(2,end-2:end) = 2 or, simply, A(2,2:4) = 2

12 years ago | 1

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Solve system of equations when symbolic vector is referencing its own elements?
Michael, use syms a1 a2 a3 a4 a5 a6 a7 a = [a1 a2 a3 a4 a5 a6 a7]'; eq = [ 2610.0 - 0.0001*a5 - 1.0e-6*a7 - 0.01*a3, ...

12 years ago | 0

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How to record excution time of a subfunction during runtime?
Daniel, use <http://www.mathworks.de/de/help/matlab/ref/tic.html |tic|> and |toc|. tic [your subroutine call or commands] ...

12 years ago | 1

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Answered
Using An Equation As An Input Argument For A Function
Mike, check out the code below: function fun_test() f = @(x) x^8 - 1.5; xl = 0; xu = 1; sol = fun_solve(f, x...

12 years ago | 2

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Can you put a function inside a for loop?
Sure, e.g., a = [5 4 3 2]; for ii = 1:numel(a) b(ii) = times(a(ii),ii); end You can have any other function inst...

12 years ago | 0

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how to use a uitable to add two numbers
Sivakumaran, does this do the trick? f = figure('Position',[200 200 350 150]); a = 2; b = 4; dat = [a b a+b]; cna...

12 years ago | 0

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Calculation the coordinate of a point
Mick, x2 = x1 + d*cos(al); y2 = y1 + d*sin(al); where |d| is the distance and |al| is the angle in rad measured between...

12 years ago | 1

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Vectors must be the same lengths
Daan, turn the script into a function and you should be good. As the first line in your code, add function myEuler() % or s...

12 years ago | 0

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Adding 3 numbers out of 5
Sarah, you could use data = [A B C D E]; datasum = sum(combnk(data,3),2);

12 years ago | 0

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How can I add the solutions of xd as a matrix , I tried with xd1 , but it still give an error. and how can I make the new value as a initial value for the next st. x0 known and kmax =10. While the solution should be a matrix of 10 rows .. Thank you !
Ammar, use for k = 1:kmax t1 = k*h; xd(k) = modeu(Fdfpek,t1,x0,h); x0 = xd(k); end

12 years ago | 0

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How to change mathematical symbols of division (/ to ./) and multiplication(* to .*) in a very long formula obtained by symbolic tool.
Mahak, copy-paste the formula into a script/function editor and use CTRL+F to replace the strings.

12 years ago | 0

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Could you please tell me algorithm how to chose numbers in a matrix which is sastified a condition?
Luc, use a = [1 2 3;3 4 6;8 9 13]; [row col] = find(a>= 2 & a<=5); which will give you the row and colum indic...

12 years ago | 0

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sprintf changes in each iteration
Md, do you mean something like for iFile=1:10 sprintf('A_%d_20%4d',iFile,1403-iFile+1) end To load a .mat file in...

12 years ago | 0

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how to give three inputs to a scope block in simulink ?
Kishore, simply use a multiplexer (Mux) block (in > Commonly Used Blocks) to combine the signals into one vector signal. The vec...

12 years ago | 0

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How to extract certain rows of a matrix?
Mnr, you could use rows = find(all(data==0,2))

12 years ago | 0

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Finding varible in equation from vectors.
Giuseppe, use c = y - m.*x

12 years ago | 0

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How to Start simulating matlab code using raspberry pi
Nitesh, I recommend watching this <http://www.mathworks.com/videos/raspberry-pi-programming-using-simulink-81996.html?form_seq=c...

12 years ago | 0

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how do i change a scientific figures?
YJ, how about this: X = '0.0000012345'; Y = '0.0987654321'; strValues = sprintf('(%4.1e,%4.1e)',str2num(X),str2num(Y)); ...

12 years ago | 0

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How to delete leading zeros in a row vector in MATLAB?
If it's a vector of chars, this should do: data = regexprep(data,'^0*','')

12 years ago | 5

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Circshift not working for values of zero.
Use x_2 = circshift(x',-1,1)'

12 years ago | 1

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Can someone tell me where is the problem? Matlab doesnt want to show me the real and the imag part of equation
Stefan, the problem is that the real and imaginary parts depend on the values of the variables, of course. Let me illustrate wit...

12 years ago | 1

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how to construct the matrix of size 10x1000
Asram, by 10x1000 do you mean 10 columns, 1000 rows? mymat = ones(1000,1)*(1:10) or rather 10 rows, 1000 columns, where t...

12 years ago | 1

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Creating two vectors from one.
Giuseppe, use xr = x(1:end-1,1).*x(2:end,2) xr = -16 6 4 and equivalent for the other calculation.

12 years ago | 1

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How to cancel the shadow of the blocks in .mdl files? (Matlab 2013a)
Mike, select File > Simulink Preferences > Editor Defaults > Use classic diagram theme (in the Simulink model window).

12 years ago | 0

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Undefined function 'qquadrature' for input arguments of type 'double'
Note, that |qquadrature()| is not a built-in MATLAB function. What does MATLAB return for which qquadrature If it is ...

12 years ago | 0

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Plots for second order control system in the same graph
Carlos, check out function myDE() prompt = {'xmin:','xmax:'}; name = 'Input x-range'; numlines = 1; xlimits ...

12 years ago | 0