Answered

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...

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...

8 years ago | 0

| accepted

Answered

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; >>...

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; >>...

8 years ago | 0

Solved

Determine if input is odd

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

8 years ago

Question

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...

8 years ago | 1 answer | 1

Answered

function creating new vector

if 0<x(1,i)<1 should be if x(1,i)>0 && x(1,i)<1

function creating new vector

if 0<x(1,i)<1 should be if x(1,i)>0 && x(1,i)<1

9 years ago | 0

Answered

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...

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...

9 years ago | 0

Solved

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...

9 years ago

Solved

Weighted average

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

9 years ago

Solved

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.

9 years ago

Solved

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...

9 years ago

Solved

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:...

9 years ago

Answered

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...

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...

9 years ago | 1

| accepted

Answered

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...

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...

9 years ago | 1

| accepted

Answered

how to display two graphs in separate figure windows using plot command?

Use figure command plot(a); figure;plot(b,'r');

how to display two graphs in separate figure windows using plot command?

Use figure command plot(a); figure;plot(b,'r');

9 years ago | 9

| accepted

Answered

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 ...

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 ...

9 years ago | 0

Answered

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...

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...

9 years ago | 0

Answered

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

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

9 years ago | 0

Answered

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...

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...

9 years ago | 0

Answered

"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...

"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...

9 years ago | 1

Answered

MATLAB 7.5 doesn't calculate the whole operation

Try typing format long in your command window.

MATLAB 7.5 doesn't calculate the whole operation

Try typing format long in your command window.

9 years ago | 0

Answered

How to save .mat file in a function?

Your last line should be save('example.mat', 'result');

How to save .mat file in a function?

Your last line should be save('example.mat', 'result');

9 years ago | 0

Answered

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...

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...

9 years ago | 0

Answered

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 = ...

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 = ...

9 years ago | 0

Answered

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

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

9 years ago | 0

Answered

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...

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...

9 years ago | 0

| accepted

Answered

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);

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);

9 years ago | 0

Answered

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 ...

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 ...

9 years ago | 0

Answered

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...

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...

9 years ago | 0