Respondida
How to solve complex equations in matlab.?
I think he wants to actually solve the equation, so perhaps he is looking for something like this >> syms R; Y=-(1-R)/(1...

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Respondida
How can I define an array of symbolic functions?
Are you looking for something like this? >> syms t; >> a=zeros(3,1); >> a=sym(a); >> a(1)=t; >> a(2)=t+1; >>...

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Resuelto

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

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Resuelto

Add two numbers
Given a and b, return the sum a+b in c.

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Pregunta

How to calculate autocorrelation matrix eigenvalues without actually creating the matrix
Hi, I am working with a large autocorrelation vector (size 1.023e6 ). It is well known that the autocorrelation matrix can be fo...

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respuesta

Respondida
function creating new vector
if 0<x(1,i)<1 should be if x(1,i)>0 && x(1,i)<1

más de 12 años hace | 0

Respondida
about the fft plot of a discreate signal
Hi, the zero frecuency is the continous component of your signal (which is the mean value of your signal). For instance if you a...

más de 12 años hace | 0

Resuelto

Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

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Resuelto

Is my wife right?
Regardless of input, output the string 'yes'.

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Resuelto

Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

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Resuelto

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

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Resuelto

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

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Resuelto

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

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Respondida
integrate definite integrals matlab
>> syms x >> int((5*x)/((x^3-(7*x))^4),-1,1) ans = NaN Which is correct if you consider you are worki...

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Respondida
fft on samples of an audio file in matlab
If you have a .wav audio named filename you can do [y, Fs] = wavread(filename) Where Fs is the sampling frecuency and y yo...

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Respondida
how to display two graphs in separate figure windows using plot command?
Use figure command plot(a); figure;plot(b,'r');

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Respondida
looping a matrix from a text file
Is it necessary to use a loop? So if I understand well you want to sum the rows, in this case if A = 1.0000 ...

casi 13 años hace | 0

Respondida
use the for or while looping to the series S=4*[sin(theata)/1 +sin(3theata)/3+sin(5theata)/5+.....] ,,in the range 0<theata<pi with error bound of 10^-6..?....please help me to solve this question in the earliest opportunity
Try this theata=pi/2; a=1; S=0; n=1; while (a>10e-6) a=sin(n*theata)/n; S=S...

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Respondida
plotting an array of doubles
He means that you should do for n =1:1:5001 snr1(n) = rms(input(n))/ rms(out(n)); end

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Respondida
How do I create a vector of n exponentially increasing values from a to b?
>> y=zeros(4,1); >> n=1:1:4; >> y(1:4)= a*gf.^(n(1:4)-1); >> y y = 1.0000 2.1544 4.64...

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Respondida
"DOUBLE cannot convert the input expression into a double array. If the input expression contains a symbolic variable, use the VPA function instead."
The problem comes in double(subs(C)) From your code C=u1^2+3*u2^2+2*u3^2; so when you do subs(C) an...

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Respondida
MATLAB 7.5 doesn't calculate the whole operation
Try typing format long in your command window.

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Respondida
How to save .mat file in a function?
Your last line should be save('example.mat', 'result');

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Respondida
how to use the 'solve' function?
Using arbitrary values for x, h, h0, A and L >> syms eta; >> x=1;h=1;ho=1;A=0.1;L=1; >> f=x/L -(1-(h+eta)/ho) - A...

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Respondida
how to use the 'solve' function?
Doing >> tmp = solve('x/L = (1-(h+eta)/ho) - A*log(((h+eta)/ho - A)/(1-A))','eta')% no semicolon here tmp = ...

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Respondida
How to tell Matlab to give real cube roots instead of complex ones?
Try this sign(x).*abs(x.^(1/3)) >> sign(-1).*abs(-1.^(1/3)) ans = -1

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Respondida
Regarding Wavelets and DWT.
Basically the wavelet transform is similar to the STFT(Short time Fourier Transform), because it links the frecuency of a signal...

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Respondida
Insert a blank column every n columns
Try this, if you want to insert a blank column every 5 columns A=rand(10,360); A=num2cell(A); A(:,1:5:end)=cell(1);

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Respondida
there is a problem about these code in Matlab
Try function [y1,y2]=test(x1,x2) if nargin==1 y1=x1; if nargout==2 y2=x1; end else ...

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Respondida
Could someone teach me how to add numbers in a series?
Consider the Euler series to sum pi: ((pi^2)/6)=∑ (1/n^2),then pi= sqrt(6*∑ (1/n^2)) To implement the above method in Matl...

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