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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...

12年以上前 | 0

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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; >>...

12年以上前 | 0

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

12年以上前

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

12年以上前

質問

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...

12年以上前 | 1 件の回答 | 1

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

13年以上前 | 0

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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...

13年以上前 | 0

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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...

13年以上前

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

13年以上前

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

13年以上前

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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.

13年以上前

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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...

13年以上前

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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:...

13年以上前

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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...

13年以上前 | 1

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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...

13年以上前 | 1

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

13年以上前 | 11

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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 ...

13年以上前 | 0

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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...

13年以上前 | 0

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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

13年以上前 | 0

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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...

13年以上前 | 0

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"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...

13年以上前 | 1

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

13年以上前 | 0

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

13年以上前 | 0

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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...

13年以上前 | 1

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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 = ...

13年以上前 | 0

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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

13年以上前 | 0

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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...

13年以上前 | 0

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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);

13年以上前 | 0

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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 ...

13年以上前 | 0

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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...

13年以上前 | 0